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Configuring and Monitoring
the DLSw Protocol
This chapter includes all of the configuration and monitoring commands applicable to DLSw. It contains these sections:
About DLSw Configuration and Monitoring Commands
Accessing the DLSw Configuration Prompt
Accessing the DLSw Monitoring Prompt
DLSw Commands
About DLSw Configuration and Monitoring
Commands
DLSw configuration commands are available at the DLSw config> prompt. Changes made to the router's configuration do not take effect immediately. They only become part of the router's non-volatile configuration memory when it restarts.
Conversely, DLSw monitoring commands are available at the DLSw> prompt. Monitoring commands take effect immediately, but do not become part of router's non-volatile configuration memory. Thus, while monitoring commands allow you to make real-time changes to the router's configuration, these changes are temporary. The router's configuration memory overwrites them when the router restarts.
Monitoring consists of these actions:
Monitoring the protocols and network interfaces currently in use by the router.
Displaying ELS (Event Logging System) messages relating to router activities and performance.
Making real-time changes to the DLSw configuration without permanently affecting the router's non-volatile configuration memory.
Accessing the DLSw Configuration Prompt
Use the router's configuration process to change the configuration of the router. The new configuration takes effect when you restart the router.
To enter the configuration environment, enter config. This brings you to the Config> prompt:
MOS Operator Control
* config
Config>
If the Config> prompt does not appear immediately, press Return again.
All DLSw configuration commands are entered at the DLSw config> prompt. To access this prompt, enter protocol dls as shown:
Config>protocol dls
DLSw protocol user configuration
DLSw config>
Accessing the DLSw Monitoring Prompt
To enter the monitoring environment, enter monitor. This brings you to the monitoring environment as shown:
MOS Operator Control
* monitor
Monitor>
You enter DLSw monitoring commands at the DLSw> prompt. To access this prompt, enter protocol dls at the Monitor> prompt as shown:
Monitor> protocol dls
DLSw>
DLSw Commands
Table 1 lists the DLSw
configuration and monitoring commands.
[C] means the command is available at the DLSw config> prompt.
[M] means the command is available at the DLSw> prompt.
Table 1 DLSw Commands
|
Command
|
Function
|
|---|
| Add [C] [M]
|
Adds an SDLC link station or a TCP neighbor IP address. |
| BAN [C] [M]
|
Displays the Boundary Access Node prompt. |
| Close-Sap [C] [M]
|
Closes a currently opened Service Access Point (SAP). SDLC interfaces use SAPs for communication on the network. |
| Delete [C] [M]
|
Removes configured SDLC link stations and TCP connections. |
| Disable [C] [M]
|
Disables the DLSw protocol, Auto-TCP-Reconnect, SDLC link station, and LLC disconnect functionality. |
| Enable [C] [M]
|
Enables the DLSw protocol, Auto-TCP-Reconnect, SDLC link station, and LLC disconnect functionality. |
| Join-Group [C] [M]
|
Allows DLSw neighbors to find each other dynamically. |
| Leave-Group [C] [M]
|
Removes the router from the specified DLSw group. |
| List [C] [M]
|
Displays information for SDLC link stations, SAPs, circuit priority, DLSw groups, and DLSw sessions. The command also provides detailed information on TCP capabilities, connections, and statistics. |
| NetBIOS [C] [M]
|
Displays the NetBIOS prompt. |
| Open-Sap [C] [M]
|
Allows DLSw to transmit data over the specified SAP. |
| Set [C] [M]
|
Configures LLC2 parameters, number of DLSw sessions, SRB segment number, TCP buffer size, memory allocation, protocol timers, and circuit priority. |
| Exit [C] [M]
|
Returns you to the Config> prompt or Monitor> prompt. |
Add [C] [M]
Configures an SDLC link station or a TCP neighbor IP address.
Syntax: add
- sdlc
- tcp
sdlc
Adds information specifically for adding an SDLC link station to the configuration on an SDLC interface. You must use add sdlc once for each secondary station on the SDLC link.
The source and destination MAC addresses and SAPs are mandatory and must be correct for a DLSw connection to take place. If the local devices are to communicate with remote SNA devices on an SNA LAN, such as a Token Ring, then the SAPs must correspond to those in use on the remote LAN. However, if the local SDLC devices are to communicate with remote SNA devices that are attached by an SDLC data link, then the MAC addresses and SAPs are arbitrary, provided they are legal values. In this case, the MAC addresses and SAPs must logically map to the reverse source and destination addresses at the remote router.
In SDLC-to-SDLC configurations, the destination SAP (DSAP) of the primary link role router has special significance. If you set it to zero, it designates that a successful SDLC protocol handshake with the adjacent device should not generate a DLSw connection (CANUREACH). For PU2 (non-negotiable) links with each router connected via an SDLC interface, set the DSAP of the local primary router to zero. This prevents unnecessary DLSw circuit startups from occurring. Otherwise, the local primary router attempts a DLSw CANUREACH connection to the local secondary router, but since the secondary router cannot itself activate the data link to the adjacent SDLC primary station, the connection is guaranteed to fail.
Example: add sdlc
Interface #[0]?
SDLC Address [C1]?
Source MAC Address [0000C9123456]
Idblk in Hex (0-0xfff) [0]?
Idnum in Hex (0-0xfffff) [0]?
LLC Source SAP (0 for auto-assign) [0]?
LLC Destination SAP [4]?
Destination MAC Address [400000000001]?
|
Interface #
|
The number of the SDLC interface you are adding to the SDLC link station. |
|
SDLC Address
|
The SDLC address of the link station that you are connecting between 01 - FE. |
Source MAC
address
|
The MAC address for the attached SDLC PU. |
|
Idblk in Hex
|
The 3-digit hexadecimal value that identifies the device (PU) to which you are connecting. Normally you use Idblk for PUs defined as switched major nodes. Therefore, this value should match this same parameter in the VTAM Switched Major Node that corresponds to this PU. |
|
Idnum in Hex
|
The 5-digit hexadecimal value that identifies the specific device type (2.0) that you are connecting. Normally you use Idnum for PUs that are switched major nodes. Therefore, this value should match this same parameter in the VTAM Switched Major Node that corresponds to this PU. |
|
LLC Source SAP
|
Identifies the PU link station to the DLSw domain. This can be explicitly assigned via configuration or automatically assigned by software. SAPs only apply to LLC use. |
|
LLC Destination SAP
|
Defines the SAP to be used when automatically attempting a connection when the link station comes up. If this SAP is 0, then the link station is in passive mode and does not attempt to establish a circuit. In this case, the router ignores the destination MAC address. See above for more information on setting the DSAP. |
|
Destination MAC Address
|
The MAC address of the remote link station with which a connection is established when the SDLC device becomes active. The MAC address is in non-canonical bit order (Token Ring) format. This is true even if the remote end station is on the Ethernet. |
tcp
Adds the IP address of the DLSw neighbor to which the TCP is connected. You can make this connection in two ways: manual configuration of IP neighboring addresses or with DLSw groups.
Example: add tcp
Enter the DLSw neighbor IP Address [0.0.0.0]? 128.185.14.1
Transmit Buffer Size (Decimal) [5120]?
Receive Buffer Size (Decimal) [5120]?
Maximum Segment Size (Decimal) [1024]?
Enable/Disable Keepalive? (E/D) - [D]?
Neighbor Priority (H/M/L) [M]?
Enter the DLSw neighbor IP
Address
|
The IP address of the remote DLSw neighbor in the IP network to which you want to make a connection. |
|
Transmit Buffer Size
|
The size of the packet transmit buffer between 1024 and 32768. The default size is 5120. |
|
Receive Buffer Size
|
The size of the packet receive buffer between 1024 and 32768. The default size is 5120. |
Maximum
Segment Size
|
The maximum size of the TCP segment is between 1024 and 16384. The default size is 1024. |
|
Enable/Disable Keepalive (E/D)
|
Indicates whether you want the DLSw neighbor to send link keepalive messages. The default is D (Disable). |
|
Neighbor Priority
|
Allows you to specify the neighbor priority as either High, Medium, or Low. DLSw uses this parameter to determine which DLSw neighbor to choose when multiple neighbors can reach a target station. |
BAN [C] [M]
Displays the Boundary Access Node (BAN) configuring or
monitoring prompt. See Using Boundary Access Node
for information on the commands available at these prompts.
Syntax: ban
Example: ban
BAN (Boundary Access Node) configuration
BAN config>
Close-Sap [C] [M]
Disables DLSw for the specified Service Access Point (SAP). LLC uses these SAPs for configuration on the network.
Syntax: close-sap
Example: close-sap
Interface # [0]?
Enter SAP in hex (range 0-F4), 'SNA', 'NB' or 'LNM' [4]? nb
SAP F0 closed on interface 0
|
Interface #
|
The interface number used by the open SAP. |
|
Enter SAP
|
You can enter inidividual SAPs in hex or you can enter SNA, NB (NetBIOS), or LNM.
SNA closes SAPs 0, 4, 8, and C
NB closed SAP F0 for NetBIOS
LNM closes SAP F4
If you enter SAPs in hex, the range is 0 to F4, and the SAP must be an even number. |
Delete [C] [M]
Removes an SDLC link station or a TCP neighbor IP address from the DLSw configuration.
Delete [C]
Syntax: delete
- sdlc
- tcp
sdlc
Removes the specified SDLC link station from the list of stations to which DLSw can connect. This also terminates any existing session.
Example: delete sdlc
Interface #[0]?
SDLC Address [C1]?
Record deleted
|
Interface #
|
The interface number of the router that connects to the SDLC link station. |
|
SDLC Address
|
The SDLC address of the remote link station that you are deleting. Values are in the range 01 to FE. |
tcp
Removes the IP address of the DLSw neighbor to which you are making the TCP connection.
Example: delete tcp
IP Address [0.0.0.0]? 128.185.14.1
Delete [M]
Syntax: delete
- sdlc
- tcp
sdlc
Removes the specified SDLC link station from the list of stations to which DLSw can connect. This also terminates any existing session.
Example: delete sdlc
Interface #[0]?
SDLC Address [C1]?
Record deleted
|
Interface #
|
The interface number of the router that connects to the SDLC link station. |
|
SDLC Address
|
The SDLC address of the remote link station that you are deleting. Values are in the range 01 to FE. |
tcp
Removes the IP address of the DLSw neighbor to which you are making the TCP connection. This also terminates the TCP connection if one exists.
Example: delete tcp
IP Address [0.0.0.0]? 128.185.14.1
Disable [C] [M]
Disables the DLSw protocol, an SDLC link station, the LLC disconnect functionality, and automatic TCP reconnection.
Syntax: disable
- dls
- llc disconnect on session loss
- sdlc
- auto-tcp-reconnect
dls
Prevents the router from transmitting DLSw functions over all DLSw configured interfaces.
Example: disable dls
llc
Prevents the router from terminating an LLC connection actively by issuing a DISC LLC frame when a DLSw session terminates.
This command does not affect switching functionality for LLC in DLSw. Use the close-sap command to stop LLC switching functionality.
Example: disable llc
sdlc
Prevents DLSw connections to the specified SDLC link station.
If you enter this command in the monitoring environment, it terminates the existing SDLC connection.
Example: disable sdlc
Interface #[0]? 1
SDLC Address [C1]?
Record updated
auto-tcp-reconnect
Disables automatic TCP station re-establishment. When you disable this feature, DLSw does not establish TCP sessions until it needs them.
Example: disable auto
Enable [C] [M]
Enables the DLSw protocol, SDLC link stations, the LLC switching functionality, and auto-tcp-reconnect.
Enable [C]
Syntax: enable
- dls
- llc
- sdlc
- auto-tcp-reconnect
dls
Enables DLSw operation on the router.
Example: enable dls
llc
Allows the router to terminate an LLC connection upon the loss of the TCP connection.
Example: enable llc
sdlc
Enables DLSw connections to the specified SDLC link station.
Example: enable sdlc
Interface #[0]? 1
SDLC Address [C1]?
Record updated
auto-tcp-reconnect
Enables DLSw to automatically establish TCP sessions at startup and to re-establish a session when it breaks. The default is enabled.
Example: enable auto-tcp-reconnect
Enable [M]
Syntax: enable
- llc
- sdlc
- auto-tcp-reconnect
llc
Allows the router to terminate an LLC connection upon the loss of the TCP connection.
Example: enable llc
sdlc
Enables DLSw connections to the specified SDLC link station.
Example: enable sdlc
Interface #[0]? 1
SDLC Address [C1]?
Record updated
auto-tcp-reconnect
Enables DLSw to automatically establish TCP sessions at startup and to re-establish a session when it breaks. The default is enabled.
Example: enable auto
Join-Group [C] [M]
Allows DLSw neighbors to find and to create TCP sessions with each other dynamically. This eliminates the need to define TCP neighbors with the add tcp command.
There are three types of groups: Client, Server and Peer-to-Peer. DLSw groups alleviate the need for long lists of static IP addresses and the costs of maintaining them. The IP internet being used must support multicast routing.
A DLSw router can be a member of a maximum of 64 groups. DLSw group membership uses the MOSPF protocol. To use the functionality of the join-group command, you must configure OSPF and MOSPF from the OSPF Config> prompt.
When you assign a DLSw router to a group, DLSw automatically adds one of two addresses to the group number to form a multicast address. The router transmits the multicast address to identify itself to other group members and to transmit packets to those members. The two addresses that are added to the group number are 225.0.1.0 for DLSw clients and neighbors, and 225.0.1.64 for DLSw servers.
For example, the multicast address for client in group 2 would be 225.0.1.2.
Syntax: join-group
Example: join-group
Group ID (1-64 Decimal) [1]? 2
Client/Server or neighbor Group member (C/S/P)- [C]?
Transmit Buffer Size (Decimal) [5120]?
Receive Buffer Size (Decimal) [5120]?
Maximum Segment Size (Decimal) [1024]?
Enable/Disable Keepalive (E/D)- [D]?
Neighbor Priority (H/M/L) [M]?
|
Group ID
|
The number of the group that you want this router to join. |
|
Client/Server or neighbor Group Member
|
The type of group that you want to join, C for client, S for server, and P for peer-to-peer. A server forms a TCP connection with a client. |
|
Transmit Buffer Size
|
The size of the packet transmit buffer in the range of 1024 to 32768. The default is 5120. |
|
Receive Buffer Size
|
The size of the packet receive buffer between 1024 and 32768. The default size is 5120. |
Maximum
Segment Size
|
The maximum size of the TCP segment in the range of 64 to 16384. The default is 1024. |
|
Enable/Disable Keepalive
|
Indicates whether you want the DLSw neighbor to send link keepalive messages. Default is D (Disable). |
Neighbor Priority
(H/M/L) [M]?
|
Specifies the neighbor priority as High, Medium, or Low. DLSw uses this parameter to determine which DLSw neighbor to choose when multiple neighbors can reach a target station. |
Leave-Group [C] [M]
Removes the router from any specified DLSw groups that you configured with the join-group command.
Leave-Group [C]
In the configuration environment, leave-group does not affect existing TCP connections belonging to the specified group.
Syntax: leave-group group#
Example: leave-group 2
Leave-Group [M]
In the monitoring environment, leave-group terminates existing TCP connections belonging to the specified group.
Syntax: leave-group group#
Example: leave-group 2
List [C] [M]
Displays DLSw information on SDLC link stations, circuit priority, SAPs, TCP neighbors, and groups.
List [C]
Syntax: list
- dls
- groups
- llc2 sap parameters
- open llc2 saps
- priority
- sdlc link stations
- tcp neighbors
dls
Displays the information configured with the enable and set commands.
Example: list dls
DLSw is ENABLED
LLC2 send Disconnect is ENABLED
Automatic TCP connection ALWAYS CONNECT
SRB Segment number 0030
MAC <-> IP mapping cache size 128
Max DLSw sessions 3000
DLSw global memory allotment 60000
LLC per-session memory allotment 8192
SDLC per-session memory allotment 4096
NetBIOS UI-frame memory allotment 40960
Database age timer 1200 seconds
Max wait timer for ICANREACH 20 seconds
Wait timer for LLC test response 15 seconds
Wait timer for SDLC test response 15 seconds
Join Group Interval 900 seconds
Neighbor priority wait timer 2.0 seconds
|
DLSw is
|
Status of the DLSw protocol, enabled or disabled. |
LLC2 send
Disconnect is
|
Status of preventing the router from terminating an LLC2 connection upon the loss of the TCP connection. Values are enabled or disabled. |
|
SRB Segment number
|
The SRB segment that identifies DLSw in the RIF. |
Max DLSw
Sessions
|
The maximum number of DLSw sessions that the router supports. |
|
DLSw global memory allotment
|
The maximum amount of memory allowed for use by DLSw. |
|
LLC per-session memory allotment
|
The maximum amount of memory allowed for use by each LLC session. |
|
SDLC per-session memory allotment
|
The maximum amount of memory allowed for use by each SDLC DLSw session. |
NetBIOS UI-frame memory
allotment
|
The number of bytes the router allocates as a buffer for NetBIOS UI frames. |
Database age
timer
|
The maximum time to hold active database entries. |
|
Max wait timer for ICANREACH
|
The time to wait for a response to a CANUREACH before giving up. |
|
Wait timer for LLC response
|
The maximum amount of time (in seconds) the router waits for an LLC TEST response before retransmitting an LLC TEST frame. |
Wait timer for SDLC test
response
|
The maximum amount of time (in seconds) the router waits for an SDLC TEST response before retransmitting an SDLC TEST frame. |
Join Group
Interval
|
Amount of time (in seconds) between DLSw group advertisement broadcasts. |
|
Neighbor Priority Wait Timer
|
Amount of time DLSw waits before selecting a neighbor. |
groups
Displays group information for a DLSw neighbor previously configured with the join-group command.
Example: list groups
Group Role Xmit Bufsize Rcv Bufsize Max Segsize Keepalive Priority
1 CLIENT 5120 5120 1024 DISABLED MEDIUM
|
Group
|
The group number. |
|
Role
|
The type of group: Client, Server, or Peer-to-Peer. |
|
Xmit Bufsize
|
The size of the TCP transmit buffer in the range of 1024 and 32768. The default is 5120. |
|
Rcv Bufsize
|
The size of the TCP receive buffer in the range of 1024 and 32768. The default is 5120. |
|
Max Segsize
|
The maximum size of the TCP segment in the range of 64 and 16384. The default is 1024. |
|
Keepalive
|
The status of the keepalive functionality, enabled or disabled. |
|
Priority
|
Displays the priority of the neighbor router in the selection process. Neighbor priority is either High, Medium, or Low. |
llc2 sap parameters
Displays the LLC2 parameters configured with the set llc2
command (see the set command on page 77 for a complete
explanation of these parameters). You set these parameters for each interface.
If you did not use the set llc2 command to change the LLC2 parameters, no output
is generated.
Example: list llc2
SAP t1 t2 ti n2 n3 tw rw nw acc
0 1 1 30 8 1 2 2 1 0
|
SAP
|
SAP number. |
|
t1
|
Reply timer. |
|
t2
|
Receive Ack timer. |
|
ti
|
Inactivity timer. |
|
n2
|
Maximum retry value. |
|
n3
|
Number of I-frames received before sending ACK. |
|
tw
|
Transmit window. |
|
rw
|
Receive window. |
|
nw
|
ACKs needed to increment the working window (Ww). |
|
acc
|
The current LLC2 implementation does not use access priority. As a result, this parameter always defaults to 0. |
open
Displays all open SAPs and their associated interfaces.
Example: list open
Interface SAP
0 0
0 4
1 4
priority
Lists the circuit priorities selected for SNA and NetBIOS circuits, the transmit ratios between the various circuit priorities, and the largest frame size configured for NetBIOS.
Example: list priority
Priority for SNA DLSw sessions is MEDIUM
Priority for NetBIOS DLSw sessions is MEDIUM
Message allocation by C/H/M/L priority is 4/3/2/1
Maximum frame size for NetBIOS is 2052
Circuit priorities are Critical, High, Medium, or Low. The router uses the priority value you assign to selectively limit the burst-length of specific types of traffic. For example, if you assign SNA traffic a priority of Critical and NetBIOS traffic a priority of Medium, with a message allocation of 4/3/2/1, the router processes 4 SNA frames before it processes 2 NetBIOS frames. After the router processes 2 NetBIOS frames, it processes 4 SNA frames, and so on. In this scenario, two thirds of available bandwidth is dedicated to SNA traffic (a ratio of 4 to 2). Note that the router counts frames, rather than bytes, when allocating bandwidth according to the priorities you assign.
sdlc
Displays the SDLC link station information configured with the add sdlc command.
Example: list sdlc
Net Addr Status Idblk Idnum Source SAP/MAC Dest SAP/MAC
5 C1 Enabled 017 A0021 04 4018997E05C1 04 401AA9200C1
|
Net
|
The number of the interface that connects to the SDLC link station. |
|
Addr
|
The SDLC address, between 01 and FE, of the connecting link station. |
|
Status
|
The status of the link station, enabled or disabled. |
|
Idblk
|
The 3-digit hexadecimal value that identifies the device (PU) that you are connecting. Normally you use Idblk for PUs on switched lines (as opposed to leased lines). Therefore, this value should match this same parameter in the VTAM Switched Major Node that corresponds to this PU. |
|
Idnum
|
The 5-digit hexadecimal value that identifies the specific SDLC PU type (2.0). Normally you use Idnum for PUs on switched lines (as opposed to leased lines). Therefore, this value should match this same parameter in the VTAM Switched Major Node that corresponds to this PU. |
|
Source SAP/MAC
|
Identifies the PU link to the DLSw domain and the MAC address of the local link station. The MAC address is in non-canonical bit order (token-ring) format. This is true even if the remote end station is on the Ethernet. Use the Bridge monitoring flip command to flip the MAC address, in such cases. |
|
Dest SAP/MAC
|
Identifies the remote side of the connection to the DLSw domain. If this SAP is 0, then the link station is in passive mode and does not attempt to establish a circuit. The MAC address is in non-canonical bit order (token-ring) format. This is true even if the remote end station is on the Ethernet. Use the Bridge monitoring flip command to flip the MAC address, in such cases. |
tcp neighbors
Displays configured DLSw neighbors that are TCP neighbors. The neighbors were configured with the add tcp command.
Example: list tcp
Neighbor Xmit Bufsize Rcv Bufsize Max Segsize Keepalive Priority
-------- ------------ ----------- ----------- --------- --------
128.185.122.234 5120 5120 1024 DISABLED MEDIUM
|
Neighbor
|
The IP address of the TCP neighbor |
|
Xmit Buffer Size
|
The size of the packet transmit buffer in the range of 1024 and 32768. The default is 5120. |
|
Rcv Buffer Size
|
The size of the TCP receive buffer in the range of 1024 and 32768. The default is 5120. |
|
Maximum Segment Size
|
The maximum size of the TCP segment in the range of 64 and 16384. The default is 1024. |
|
Keepalive
|
The status of the keepalive functionality, enabled or disabled. |
|
Priority
|
The priority of the neighbor router in the selection process, either High, Medium, or Low. |
List [M]
Syntax: list
- dls
- dls global
- dls sessions all
- dls sessions ban
- dls sessions dest
- dls sessions detail
- dls sessions src
- dls sessions ip
- dls sessions nb
- dls sessions range
- dls sessions src
- dls sessions state
- dls cache all
- dls cache range
- dls memory
- groups
- llc2 open
- llc2 sap
- llc2 session
- sdlc sessions
- sdlc config
- tcp capabilities
- tcp config
- tcp sessions
- tcp statistics
dls
Displays information that pertains to the DLSw protocol. The options (global, sessions, cache, and nb) for the DLSw parameters appear below and on the following pages.
|
Global
|
Displays status, timer, and MAC address information about the DLSw protocol. |
|
Sessions
|
Displays current DLS session information including source, destination, state, flags, destination IP address, and ID. |
|
Cache
|
Lists the addresses in the DLSw MAC address cache. |
|
NB
|
Lists information on current active circuits that support NetBIOS. |
dls global
Displays DLS global parameter information.
Example: list dls global
DLSw is ENABLED
LLC2 send Disconnect is ENABLED
Automatic TCP connection ALWAYS CONNECT
SRB Segment number 000
MAC <-> IP mapping cache size 128
Max DLSw sessions 1000
DLSw global memory allotment 141056
LLC per-session memory allotment 8192
SDLC per-session memory allotment 4096
NetBIOS UI-frame memory allotment 40960
Database age timer 1200 seconds
Max wait timer for ICANREACH 20 seconds
Wait timer for LLC test response 15 seconds
Wait timer for SDLC test response 15 seconds
Join Group Interval 900 seconds
Neighbor priority wait timer 2.0 seconds
|
DLSw is
|
Status of the DLSw protocol, enabled or disabled. |
LLC2 send
disconnect is
|
Status of preventing the router from terminating an LLC2 connection upon the loss of the TCP connection. Values are enabled or disabled. |
|
SRB Segment number
|
The SRB segment that identifies DLSw in the RIF. |
|
MAC <-> IP mapping cache size
|
Specifies the size of the MAC-IP mapping cache. |
|
Max DLSw Sessions
|
The maximum number of DLSw sessions that the router can support. |
|
DLSw global memory allotment
|
The maximum amount of memory allowed for use by DLSw. |
|
LLC per-session memory allotment
|
The maximum amount of memory allowed for use by each LLC session. |
|
SDLC per-session memory allotment
|
The maximum amount of memory allowed for use by each SDLC session. |
|
NetBIOS UI frame memory allotment
|
The number of bytes the router allocates as a buffer for NetBIOS UI frames. |
Database age
timer
|
The maximum time to hold active database entries. |
|
Max wait timer for ICANREACH
|
The time to wait for a response to a CANUREACH before giving up. |
|
Wait timer for LLC test response
|
The maximum amount of time (in seconds) the router waits for an LLC TEST response before retransmitting an LLC TEST frame. |
Wait timer for SDLC test
response
|
The maximum amount of time (in seconds) the router waits for an SDLC TEST response before retransmitting an SDLC TEST frame. |
Join Group
Interval
|
Amount of time (in seconds) between DLSw group advertisement broadcasts. |
|
Neighbor priority wait timer
|
Specifies the amount of time to wait for ICANREACH responses before selecting a transport. |
dls sessions all
Displays current dls session information.
Example: list dls session all
Source Destination State Flags Dest. IP Addr Id
1. 400000000003 04 500000000003 04 Connected 128.185.236.51 2 2
dls sessions ban
Displays current information on BAN sessions.
Example: list dls session ban
BAN port number (user 0 for all ports) [0]?
No active sessions
dls session dest
Displays DLS session information by destination MAC address.
Example: list dls session dest
Destination MAC Address [40000000001]? 50000000003
Source Destination State Flags Dest. IP Addr Id
1. 400000000003 500000000003 Connected 128.185.236.51 2
2. 400000000002 500000000003 Connected 128.185.236.52 3
dls session detail
Displays detailed DLS session information.
Example: list dls session detail
Session Identifier [1]?
Source Destination State Dest. IP Addr Id
1. 400000000003 500000000003 04 Connected 128.185.236.51 2
Personality: TARGET
XIDs sent: 2
XIDs rcvd: 0
Datagrams sent: 0
Datagrams rcvd: 0
Info frames sent: 15
Info frames rcvd: 0
RIF: 0620 0202 B0B0
|
Personality
|
The ORIGINATOR (initiator) or TARGET (recipient) of the connection. |
XIDs sent
XIDs rcvd
|
XIDs that this DLSw peer has sent and received from the remote DLSw peer. |
Datagrams sent
Datagrams rcvd
|
Datagrams that this DLSw peer has sent and received from the remote DLSw peer. |
Info frames sent
Info frames rcvd
|
I-frames that this DLSw peer has sent and received from the DLSw peer. |
|
RIF
|
The information that is included in the RIF of the LLC test frame. |
dls session ip
Displays IP session information.
Example: list dls session ip
Source Destination State Dest.IP Addr Id
1.400000000003 500000000003 04 Connected 128.185.236.51 1
dls sessions nb
Lists information about the current active circuits that support NetBIOS.
Example: list dls sessions nb
Source Destination State Flags Dest. IP Addr Id
1. 0000C91373C1 F0 0003152CCCE6 F0 Connected 128.185.236.245 92
dls session range
The range of DLS sessions that you want to display. This number is located to the left of the source MAC address.
Example: list dls session range
Start [1]?
Stop [1]?
Source Destination State Dest. IP Addr Id
1.400000000003 500000000003 04 Connected 128.185.236.51 2
dls session src
Displays all DLSw session information by source MAC Address.
Example: list dls session src
Source MAC Address [400000000001]?
Source Destination State Flags Dest. IP Addr Id
1. SDLC 04 400000000002 04 Connected 10.1.49.401 1
Note:
In this example source MAC address 400000000002 maps to the "SDLC 04" name. If you do not know the source MAC address, enter list sdlc config all to obtain it.
dls session state
Displays all DLSw sessions in the specified state. The DLSw session states are defined as follows:
Example: list dls session state
DISCONECT = 0, RSLV_PEND = 1
CIRC_PEND = 2, CIRC_EST = 3
CIR_RSTRT = 4, CONN_PEND = 5
CONT_PEND = 6, CONNECTED = 7
DISC_PEND = 8, HALT_PEND = 9
REST_PEND = 10
Enter state value (0-10) [7]?
Source Destination State Flags Dest. IP Addr Id
1. 400000000003 04 10005AF181A4 04 Connected 128.185.236.84 0
2. 400000000002 04 400000000088 04 Connected 128.185.236.84 1
dls cache all
Lists the entries in the DLSw MAC address cache. This cache contains a database of the most recent MAC address to IP neighbor translations. It provides the MAC address, time to live (in seconds) in the cache, and the neighbor's IP address.
Example: list dls cache all
Mac Address Secs to live IP Address(es) Largest Frame
1. 10005AF1809B 810 128.185.236.84 1470
2. 10005AF181A4 1170 128.185.236.84 2052
3. 400000000088 1170 128.185.236.84 2052
dls cache range
Displays information for a specified range of cache entries.
Example: list dls cache range
Start[2]?
Stop[2]?
Mac Address Secs to live IP Address(es) Largest Frame
2. 10005AF181A4 1170 128.185.236.84 2052
dls memory
Lists all existing DLSw sessions and the amount of memory in use by each session. It also displays the following flow control states.
|
Ready
|
The session is not congested. |
|
Session
|
The session has used most of its session allotment and probably has flow controlled the data link. |
|
Global
|
The session is congested due to a shortage of memory in the router. |
The currently in use field shows the total amount of memory currently allocated by DLS. This includes all session allocations, control messages and TCP receive buffers.
Note:
To change the memory allocation use the set memory command.
Example: list dls memory
Total DLSw bytes requested: 141056
Global receive pool bytes granted: 84633
Currently in use: 0
Global transmit pool bytes granted: 56423
Currently in use: 232
No active sessions
groups
Displays information for all configured groups to which the router belongs.
Example: list groups
Group Role Xmit Bufsize Rcv Bufsize Max Segsize Keepalive Priority
1 CLIENT 5120 5120 1024 DISABLED MEDIUM
|
Group
|
Number of the group. |
|
Role
|
Type of group. |
|
Xmit Bufsize
|
Size of the TCP transmit buffer in the range of 1024 and 32768. The transmit buffer size must be at least twice the maximum segment size. Default is 5120. |
|
Rcv Bufsize
|
Size of the TCP receive buffer in the range of 1024 and 32768. The receive buffer size must be at least twice the maximum segment size. Default is 5120. |
|
Max Segsize
|
Maximum size of the TCP segment, in the range of 64 and 16384. The default is 1024. |
|
Keepalive
|
The status of the keepalive functionality, enabled or disabled. |
|
Priority
|
Displays the priority of the DLSw group as either High, Medium, or Low. |
llc2 open
Displays information that pertains to LLC2. The options (open SAPs, SAP parameters, and sessions) for LLC2 are described below and on the following pages.
|
Open
|
Displays information for all currently open SAPs on interfaces between LLC2 peers. |
Example: list llc2 open
Interface SAP
0 0
0 4
llc2 sap
Displays LLC2 parameter configuration information. Only configurations that were changed are displayed. If you did not use the set llc2 command, no output is generated.
Example: list llc2 sap
SAP T1 t2 ti n2 n3 tw rw nw acc
llc2 sessions all
Displays current information for all LLC2 sessions.
Example: list llc2 sessions all
SAP Int. Remote Addr Local Addr State RIF
1. 04 6 400000000003 500000000003 CONTACTED 0620 0202 B0B0
llc2 sessions range
Displays current information for the selected range of LLC2 sessions.
Example: list llc2 sessions range
Start[1]?
Stop[1]?
SAP Int. Remote Addr Local Addr State RIF
1. 04 6 400000000003 50000000000 Contacted 0620 0202 B0B0
sdlc sessions
Displays information about all SDLC DLS sessions within the router.
Example: list sdlc sessions
NET Addr. Source SAP Dst SAP Dest Mac InQ OutQ State
1. 2 C1 04 04 40:00:00:00:00:02 00 00 Contacted
sdlc config
Displays configured parameters for the SDLC attached PU.
Example: list sdlc config
Interface #, or 'ALL' [0]? 5
Net Addr Status Idblk Idnum Source SAP/MAC Dest SAP/MAC
5 C1 Enabled 000 00000 04 4018997E05C1 04 401AAB9200C1
tcp capabilities
Displays the information received from a partner DLSw router in the capabilities exchange message.
Example: list tcp capabilities
Enter the DLSw neighbor IP Address [0.0.0.0]? 1.1.1.2
Vendor ID: 0000C9
Vendor version: Netrix (tm) 5.2
Initial pacing window: 12
Preferred TCP connections: 1
Supported SAPs: 00 04 08 0C
tcp config
Displays information on all configured TCP sessions.
Example: list tcp config
Neighbor Xmit Bufsize Rcv Bufsize MaxSegsize Keepalive Priority
128.185.122.234 5120 5120 1024 DISABLED MEDIUM
tcp sessions
Displays the version, the number of currently active DLSw sessions using this TCP session, and the number of DLSw sessions that have ever used this TCP session.
Example: list tcp sessions
Group IP Address Conn State Version Active Sess SessCreates
1 1.1.1.1 ESTABLISHED AIW V1R0 2 4
tcp statistics
Displays statistics on the use of TCP sessions.
Example: list tcp statistics
Enter the DLSw neighbor IP Address [0.0.0.0]? 1.1.1.1
Transmitted Received
----------- -----------
Data Messages 217 314
Data Bytes 31648 43796
Control Messages 64 74
CanYouReach Explorer Messages 6 0
ICanReach Explorer Messages 0 4
NameQuery Explorer Messages 0 0
NameRecognized Explorer Messages 0 0
NetBIOS [C] [M]
Displays the NetBIOS configuration or monitoring prompt. See Bridging in the Online Library for more information on the commands available at this prompt.
Syntax: netbios
Example: netbios
NetBIOS Support User Configuration
NetBIOS config>
Open-Sap [C] [M]
Enables DLSW to transmit data for the specified link SAP.
You should execute open-sap on the router that resides on the session initiator side of the connection. For example, if the client is always the sessions initiator, you need to open the SAPs only on the client side router. If you are unsure which side initiates the connection, open the SAPs on both sides. The commonly used SNA SAP values are 04, 08, and 0C. NX Networks recommends that you open 04, 08, and 0C on all participating DLSw routers.
Syntax: open-sap
Example: open-sap
Interface # [0]?
Enter SAP in hex (range 0-F4), 'SNA', 'NB' or 'LNM' [4]? lnm
SAP F4 opened on interface 0
|
Interface #
|
The number of the interface over which you want to open the SAP. |
|
Enter SAP in hex
|
You can enter individual SAPs in hex, or you can enter SNA, NB (NetBIOS), or LNM.
SNA opens SAPs 0, 4, 8, and C
NB opens SAP F0 for NetBIOS.
LNM opens SAP F4.
If you enter SAPs in hex, the range is 0 to F4, and the SAP must be an even number. |
Set [C] [M]
Configures the size of the MAC address-to-IP address mapping cache, LLC2 parameters, maximum number of DLSw sessions, SRB segment number, protocol timers, and TCP receive buffer size.
Set [C]
Syntax: set
- cache
- llc2
- maximum
- memory
- srb
- timers
- priority
cache size
Lets you specify the size of the MAC address-to-IP address mapping cache.
DLSw uses information stored in this cache to discover routes to remote stations. Thus, the larger the cache, the better the chances of DLSw finding a desired remote station without broadcasting CANUREACH frames to all known TCP/IP neighbors.
Nonetheless, it is wise to avoid setting this cache size too large. Doing so consumes memory in the router. The effect is a reduction in the number of DLSw sessions the router can handle.
Example: set cache
MAC <-> IP cache size (4 - 65535) [128]?
llc2
Allows you to configure specific LLC2 attributes for a specific SAP.
Example: set llc2
Enter SAP in hex (range 0-FE) [0]?
Reply timer (T1) in sec. [1]?
Receive Ack timer (T2) in 100 millisec. [1]?
Inactivity Timer (Ti) in sec. [30]?
Transmit Window (Tw), 1-128, 0=default [2]?
Receive Window (Rw), 127 Max [2]?
Acks needed to increment Ww (Nw) [1]?
Max Retry value (N2) [8]?
Number I-frames received before sending ACK (N3) [1]?
|
Enter SAP in hex
|
The SAP number that you want to tune. Values in the range of 0 - FE. |
|
Reply timer (T1)
|
This timer expires when the LLC2 neighbor fails to receive a required acknowledgment or response from the other LLC2 neighbor. |
|
Receive Ack timer (T2)
Inactivity Timer (Ti)
|
The delay it takes to send an acknowledgment for a received I-format frame in milliseconds.
This timer expires when the LLC does not receive a frame for a specified time period. When this timer expires, the LLC2 neighbor transmits an RR until the LLC2 neighbor responds or the N2 retry count is exceeded. Default is 30 seconds. |
Transmit Window
(Tw)
|
The maximum number of I-frames that can be sent before receiving an RR. Values in the range 1 - 127. 0 sets Tw to the default. Default is 2. |
|
Receive Window (Rw)
|
The maximum number of unacknowledged sequentially numbered I-frames that an LLC2 neighbor can receive from a remote host. |
|
Acks needed to increment Ww (Nw)
|
The working window (Ww) is a dynamically changing shadow of the transmit window (Tw). After an LLC error is detected, the working window (Ww) is reset to 1. The Acks needed to increment Ww value specifies the number of acks that the station must receive before incrementing Ww by 1. The Ww continues to be incremented in this fashion until Ww = Tw. |
|
Max Retry value (N2)
|
The maximum number of times the LLC2 neighbor transmits an RR without receiving an acknowledgment when the inactivity timer (Ti) expires. |
|
Number I-frames received before sending ACK (N3)
|
The value used with the T2 timer to reduce acknowledgment traffic for received I-frames. This counter is set to a specified value and decrements each time an I-frame is received. When this counter reaches 0 or the T2 timer expires, an acknowledgment is sent. The default is 1. To ensure good performance, set N3 to a value less than the remote LLC's Tw. |
maximum #-of-sessions
Sets the maximum number of DLSw sessions that the DLSw protocol can support.
Example: set maximum
Maximum number of DLSw sessions (1-60000) [1000]?
memory
Allows you to specify the total amount of memory allocated to DLSw, and the total amount of memory to be allotted to each DLSw session.
Example: set memory
Number of bytes to allocate for DLSw (at least 26368) [141056]?
Number of bytes to allocate per LLC session [8192]?
Number of bytes to allocate per SDLC session [4096]?
Number of bytes to allocate for NetBIOS UI-frames [40960]?
The default for the number of bytes to allocate to DLSw is probably too low to be useful for more than a small number of DLSw sessions. Raise the memory value depending on the anticipated number of DLSw sessions, TCP neighbors, and the amount of memory available in the router.
The maximum memory required by a single session is approximately the following:
session_allocation * number_of_sessions * 75%
Adjust this number to 80-85% if the data stream includes many small packets.
Each TCP connection to a DLSw neighbor requires roughly 512 bytes.
For example, assuming 8K per LLC session and 4K per SDLC session, a total of 100 DLSw sessions (20 SDLC and 80 LLC) through a combination of 4 DLSw neighbors requires approximately
(20 * 4K * 75%) + (80 * 8K * 75%) + (4 * 512) = 555,008 bytes.
If you anticipate many small packets, then
(20 * 4K * 85%) + (80 * 8K * 85%) + (4 * 512) = 628,736 bytes.
At no point does bad judgment in determining the DLSw allocation result in lost data. In general, the more memory allocated to DLSw, the better the overall DLSw performance. When DLSw runs out of memory, an ELS message, DLS.161 (Entering GLOBAL congestion on global DLS pool) is generated. It is okay for these messages to appear occasionally. If they appear very often, consider increasing the DLSw allocation value.
srb segment-number
Sets the Source Routing Bridge (SRB) segment number that identifies DLSw on Token Ring networks. Specify the segment number as a three-digit hexadecimal value.
Example: set srb
Enter segment number hex (1-FFF) [5]?
timers
Sets the DLSw protocol timers.
Example: set timers
Database age timer (1-1000 secs. Decimal) [1200]?
Max wait timer ICANREACH (1-1000 secs Decimal) [20]?
Wait timer LLC test response (1-1000 secs. Decimal) [15]?
Wait timer SDLC test response (1-1000 secs. Decimal) [15]?
Group join timer interval (1-60000 secs. Decimal) [15]?
Neighbor priority wait timer (1.0-5.0 secs. Decimal) [5.0]?
|
Database age timer
|
How long to hold unused DLSw database entries. Database entries map destination MAC addresses into the set of DLSw neighbors that can reach them. |
|
Max wait timer ICANREACH
|
How long to wait for an ICANREACH response for a previously transmitted CANUREACH. |
|
Wait timer LLC test response
|
How long to wait for an LLC test response before giving up. |
|
Wait timer SDLC test response
|
How long to wait for an SDLC test response before giving up. |
|
Group join timer interval
|
The group interval timer is significant when you configure a pair of DLSw routers to use a TCP group with the join command, rather than statically configuring each router with the adjacent IP address of its DLS neighbor using the add tcp command.
When you use set timer from the DLSw> prompt, you are prompted for a group update interval value. When the router is first powered up, it sends group packets every 15 seconds or the configured group update interval, whichever is smaller, for the first 6 transmissions, and then the configured time thereafter.
If an IP router between two partner DLSw routers goes down, the attempt to re-establish the TCP connection takes place once the configured group update interval value has elapsed after the IP router has recovered. If the configured value is 15 seconds, then the attempt to re-establish the TCP connection takes place 15 seconds after the recovery of the IP router is detected.
The range is 1 to 60000 seconds in decimal. The default is 900 seconds. |
|
Neighbor priority wait timer
|
Amount of time (in seconds) to wait during exploration before selecting a neighbor. |
priority
Lets you specify the circuit priorities to use for SNA circuits and NetBIOS circuits. You can use this command to specify circuit priority as Critical, High, Medium, or Low. Note that you must assign circuit priorities in descending order from Critical to Low.
The router uses the priority value you assign to selectively limit the burst-length of specific types of traffic. For example, if you assign SNA traffic a priority of Critical and NetBIOS traffic a priority of Medium, with a message allocation of 4/3/2/1, the router processes 4 SNA frames before it processes 2 NetBIOS frames. After the router processes 2 NetBIOS frames, it processes 4 SNA frames, and so on. In this scenario, two thirds of available bandwidth is dedicated to SNA traffic (a ratio of 4 to 2). Note that the router counts frames, rather than bytes, when allocating bandwidth according to the priorities you assign.
You can also use this command to set the maximum frame size to use for NetBIOS. Set this parameter to the largest frame size you expect to need, and no larger. Setting the frame size larger than needed reduces the number of available buffers.
Example: set priority
Priority for SNA DLSw sessions (C/H/M/L) [M]?
Priority for NetBIOS DLSw sessions (C/H/M/L) [M]?
Message allocation by C/H/M/L priority (4 digits) [4/3/2/1]?
Maximum NetBIOS frame size (516, 1470, 2052, or 4399) [2052]?
Set [M]
Syntax: set
- llc2
- memory
- priority
- timers
llc2
Allows you to configure specific LLC2 attributes for a specific SAP.
Example: set llc2
Enter SAP in hex (range 0-F4) [0]?
Reply timer (T1) in sec. [1]?
Receive Ack timer (T2) in 100 millisec. [1]?
Inactivity Timer (Ti) in sec. [30]?
Transmit Window (Tw), 1-128, 0=default [2]?
Receive Window (Rw), 127 Max [2]?
Acks needed to increment Ww (Nw) [1]?
Max Retry value (N2) [8]?
Number I-frames received before sending ACK (N3) [1]?
|
Reply timer (T1)
|
This timer expires when the LLC2 neighbor fails to receive a required acknowledgment or response from the other LLC2 neighbor. |
|
Receive Ack timer (T2)
|
The delay it takes to send an acknowledgment for a received I-format frame in milliseconds. |
|
Inactivity Timer (Ti)
|
This timer expires when the LLC does not receive a frame for a specified time period. When this timer expires, the LLC2 neighbor transmits an RR until the LLC2 neighbor responds or the N2 retry count is exceeded. Default is 30 seconds. |
Transmit Window
(Tw)
|
The maximum number of I-frames that can be sent before receiving an RR. Values in the range 1 - 127. 0 sets Tw to the default. Default is 2. |
|
Receive Window (Rw)
|
The maximum number of unacknowledged sequentially numbered I-frames that an LLC2 neighbor can receive from a remote host. |
|
Acks needed to increment Ww (Nw)
|
The working window (Ww) is a dynamically changing shadow of the transmit window (Tw). After an LLC error is detected, the working window (Ww) is reset to 1. The `Acks needed to increment Ww' value specifies the number of acks that the station must receive before incrementing Ww by 1. The Ww continues to be incremented in this fashion until Ww = Tw. |
|
Max Retry value (N2)
|
The maximum number of times the LLC2 neighbor transmits an RR without receiving an acknowledgment when the inactivity timer (Ti) expires. |
|
Number I-frames received before sending ACK (N3)
|
The value used with the T2 timer to reduce acknowledgment traffic for received I-frames. This counter decrements each time an I-frame is received. When this counter reaches 0 or the T2 timer expires, an acknowledgment is sent. Default is 1. |
memory
Specifies the total amount of memory allocated to DLSw and the total amount of memory to be allotted to each DLSw session. This command affects only new DLSw sessions.
Example: set memory
Number of bytes to allocate for DLSw (at least 26368) [141056]?
Number of bytes to allocate per LLC session [8192]?
Number of bytes to allocate per SDLC session [4096]?
Number of bytes to allocate for NetBIOS UI-frames [40960]?
The SDLC and LLC allocations will affect new sessions only
Note that the default value offered for the number of bytes to allocate to DLSw is probably too low to be useful for more than three to four DLSw sessions. You should raise the memory value depending on the anticipated number of DLSw sessions, TCP neighbors, and the amount of memory available in the router.
The maximum memory required by a single session is approximately the following:
session_allocation * number_of_sessions * 75%
This number should be adjusted to 80-85% if the data stream includes many small packets.
Each TCP connection to a DLSw neighbor requires roughly 512 bytes.
For example, assuming 8K per LLC session and 4K per SDLC session, a total of 100 DLSw sessions (20 SDLC and 80 LLC) through a combination of 4 DLSw neighbors requires approximately
(20 * 4K * 75%) + (80 * 8K * 75%) + (4 * 512) = 555,008 bytes.
If many small packets are anticipated, then
(20 * 4K * 85%) + (80 * 8K * 85%) + (4 * 512) = 628,736 bytes.
At no point will bad judgment in determining the DLSw allocation result in lost data. In general, the more memory allocated to DLSw, the better the overall DLSw performance. When DLSw runs out of memory, it generates ELS message DLS.161 (Entering GLOBAL congestion on global DLS pool). It is okay for these messages to appear occasionally. If they appear very often, then consider increasing the DLSw allocation value.
priority
Lets you specify the circuit priorities to use for SNA circuits and NetBIOS circuits. You can use this command to specify circuit priority as Critical, High, Medium, or Low. Note that you must assign circuit priorities in descending order from Critical to Low.
The router uses the priority value you assign to selectively limit the burst-length of specific types of traffic. For example, if you assign SNA traffic a priority of Critical and NetBIOS traffic a priority of Medium, with a message allocation of 4/3/2/1, the router processes 4 SNA frames before it processes 2 NetBIOS frames. After the router processes 2 NetBIOS frames, it processes 4 SNA frames, and so on. In this scenario, two thirds of available bandwidth is dedicated to SNA traffic (a ratio of 4 to 2). Note that the router counts frames, rather than bytes, when allocating bandwidth according to the priorities you assign.
You can use this command to set the maximum frame size to use for NetBIOS. Set this parameter to the largest frame size you expect to need, and no larger. Setting the frame size larger than needed reduces the number of available buffers.
Example: set priority
Priority for SNA DLSw sessions (C/H/M/L) [M]?
Priority for NetBIOS DLSw sessions (C/H/M/L) [M]?
Message allocation by C/H/M/L priority (4 digits) [4/3/2/1]?
Maximum NetBIOS frame size (516, 1470, 2052, or 4399) [2052]?
timers
Sets the DLSw protocol timers.
Example: set timers
Database age timeout (1-10000 secs. Decimal) [1200]?
Max wait timer ICANREACH (1-1000 secs. Decimal) [30]?
Wait timer LLC test response (1-1000 secs. Decimal) [15]?
Wait timer SDLC test response (1-1000 secs. Decimal) [15]?
Group join timer interval (1-60000 secs. Decimal) [900]?
Neighbor priority wait timer (1.0-5.0 secs. Decimal) [5.0]?
|
Database age timeout
|
How long to hold unused DLSw database entries. Database entries map destination MAC addresses into the set of DLSw neighbors that can reach them. |
|
Max wait timer ICANREACH
|
How long to wait for an ICANREACH response for a previously transmitted CANUREACH. |
|
Wait timer LLC test response
|
The length of time to wait for an LLC test response before giving up. |
|
Wait timer SDLC test response
|
The length of time to wait for an SDLC test response before giving up. |
|
Group join timer interval
|
The group interval timer is significant when you configure a pair of DLSw routers to use a TCP group with the join command, rather than statically configuring each router with the adjacent IP address of its DLSw neighbor using the add tcp command. When you use set timer from the DLSw> prompt, the router prompts you for a group update interval value.
When you first power up the router, it sends group packets every 15 seconds or the configured group update interval, whichever is smaller, for the first 6 transmissions, and then the configured time thereafter.
If an IP router between two partner DLSw routers goes down, the attempt to re-establish the TCP connection takes place once the configured group update interval value has elapsed after the IP router has recovered. If the configured value is 15 seconds, then the attempt to re-establish the TCP connection takes place 15 seconds after the recovery of the IP router is detected. The range is 1 to 60000 seconds in decimal. The default is 900 seconds (15 minutes). |
|
Neighbor priority wait timer
|
Specifies the amount of time DLSw waits before selecting a neighbor. |
Exit [C] [M]
Use the exit command to return to the Config> or Monitor> prompt.
Example: exit
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