This document describes the Nx Networks implementation of NetBIOS over bridged networks and over DLSw networks. It includes the following topics:

About NetBIOS

NetBIOS relies on broadcast frames for most of its functions. While this may not present a problem in LAN environments, these broadcasts can be costly in internetwork environments by causing congestion, as well as increased costs for WAN links.

NetBIOS uses LLC type 1 (LLC1) and LLC type 2 (LLC2) services:

• LLC1 provides connectionless data transfer. It requires name conflict resolution, station status gathering flows, and circuit and connection setup flows.

• LLC2 provides a connection-oriented data transfer that uses I-frame traffic sent on established LLC2 connections.

NetBIOS names have 16 ASCII characters. IBM and Microsoft reserve the 16th character of the NetBIOS name.

There are two types of NetBIOS names:

• Individual names represent a single NetBIOS client or server and should be unique within the NetBIOS network.

• Group names represent a group of NetBIOS stations (an OS/2 LAN Server domain, for example). These names should not be the same as any individual NetBIOS names in the network.

NetBIOS Name Conflict Resolution

NetBIOS Session Setup Procedure

The following is the process of establishing a session:

1. The client repeatedly broadcasts a Spanning Tree Explorer (STE) NetBIOS UI frame that contains the NetBIOS name of the server to all NetBIOS stations.

2. When the server receives the frame, it responds to the client with a corresponding All Routes Explorer (ARE) NetBIOS UI frame that contains the MAC address of the server and, for Token Ring, the route to the server.

The client can then do either of the following:

a. Establish an LLC2 connection to communicate with the server using I-frames.

b. Begin communicating with the server, using specifically-routed NetBIOS UI frames.

• Filter as many broadcast NetBIOS frames as possible.

• Forward unfiltered NetBIOS UI frames on as few bridge ports or DLSw TCP sessions as possible.

Once the router filters frames, name caching and route caching control how the router forwards the remaining frames.

Using MAC Filtering describes MAC address filtering.

The following sections describe frame type, duplicate frame, and response filtering, name and route caching, and name and byte filtering.

Frame Type Filtering

• Name Conflict Resolution

• General Broadcast

• Trace Control

Use the following guidelines to determine when to filter Name Conflict Resolution frames:

• It is critical that the NetBIOS names of stations to which a NetBIOS session is established (typically a server) be unique.

• It is also usually critical that the individual NetBIOS names of stations within the same group (or domain) be unique.

• It is often not critical that the NetBIOS names of stations from which a NetBIOS session is set up (typically a client) be unique, especially across domains.

  For this reason, networks in which there is good control over server names may gain advantage by filtering name conflict resolution frames. This is especially true for DLSw networks.

Trace Control Frames

Configuring Frame Type Filtering

For DLSw traffic, the router filters all of the above frame types as the default. To turn frame type filtering on or off for DLSw, enter set filters dlsw.

For example:

NetBIOS config>set filters bridge

Filter Name Conflict frames? [No]: yes

Name conflict filtering is              ON

Filter General Broadcast frames? [No]: yes

General broadcast filtering is          ON

Filter Trace Control frames? [No]: yes

Trace control filtering is              ON

Duplicate frame filtering causes the router to forward only one instance of each frame within a configurable amount of time. Figure 1 shows how duplicate frame filtering reduces the number of broadcast frames forwarded over the DLSw WAN.

Here is the process that the originating NetBIOS client in Figure 1 uses to set up a session with the target NetBIOS server.

1. After verifying that its name is unique, the originating NetBIOS client sends six Name-Query frames at half-second intervals.

2. The originating DLSw router receives the first Name-Query frame and forwards it to the target DLSw router. The originating router filters the remaining five frames.

3. The target DLSw router receives the first Name-Query frame. It then assumes responsibility for setting up the session and sends Name-Query frames to its attached LAN as though it were the originating NetBIOS station.

4. The target NetBIOS station responds to the Name-Query frames with a corresponding Name-Recognized frame that contains its MAC address. For Token Ring frames, the target NetBIOS station also sends the route to the server.

5. The target DLSw router then returns a Specifically-Routed Frame (SRF) to the originating DLSw router, which forwards the frame to the originating NetBIOS station.

Figure 2 shows the duplicate frame filtering process for bridged traffic. In this example, the router receives six Name-Query frames in half-second intervals. The Duplicate Frame Filter Timeout is set to 1.5 seconds, and the Duplicate Frame Detect Timeout is set to 5 seconds.

Here are the steps for duplicate frame filtering:

1. When the router receives a new frame, it creates an entry for that frame in the duplicate frame database and forwards the frame.

2. The router filters any duplicate frames that it receives within the duplicate frame filter timeout (in this case, 1.5 seconds).

3. If the router receives a duplicate frame after the timer expires, it forwards the frame and resets the timer.

For DLSw traffic, the duplicate frame filtering process is the same, except that DLSw does not use the duplicate frame filter timer. DLSw uses only the duplicate frame detect timer. Once the originating router creates an entry, it filters all duplicate frames until the duplicate frame detect timer expires. For DLSw, you can also control how many query frames the target DLSw router sends during a configurable time period.

Configuring Duplicate Frame Filtering

Duplicate frame filtering is disabled for bridged traffic as the default. You can enable or disable it for bridging using the enable duplicate-filtering and disable duplicate-filtering commands.

To change the timers, enter the following:

NetBIOS config>set general

WARNING! Setting Duplicate Frame Filter Timeout to zero...
         disables duplicate frame checking!

Duplicate frame filter timeout value in seconds [1.5]? 
Duplicate frame detect timeout value in seconds [5.0]? 

General parameters set

Command frame retry count [5]? 
Command frame retry timeout value in seconds [0.5]? 

Response Frame Filtering

If the router receives a response to a command frame that it did not forward, it drops the response and does not forward it.

You cannot disable response frame filtering on the router.

Response Frame Filtering for DLSw

As described in Duplicate Frame Filtering, a target DLSw router takes responsibility for setting up a session.

A router takes responsibility for setting up a session if it matches Name-Query and Name-Recognized frames within the duplicate frame detect timeout period. If the router does not match those frames within that time period, it does not forward Name-Recognized response frames, and it does not set up the session.

The default duplicate frame detect timeout is five seconds. Do not set the duplicate frame detect timeout to zero, or the router will have no time to set up the session. You can increase the duplicate frame detect timeout using the set general command.

NetBIOS config>set general

WARNING! Setting Duplicate Frame Filter Timeout to zero...
         disables duplicate frame checking!

Duplicate frame filter timeout value in seconds [1.5]? 
Duplicate frame detect timeout value in seconds [5.0]? 

General parameters set

With name caching, the router maintains a database of NetBIOS names and routes. Each time the router receives a Name-Recognized frame, it extracts the MAC address and route and enters that information into the database.

When the router receives a Name-Query or Status-Query, it checks to see if the name being queried is already in its database. If it is, route caching converts the frame from an STE frame to a Specifically-Routed Frame (SRF). A timer on the entry invalidates the database information, if the server does not respond before the timer expires.

Enabling Caching

Types of Name Cache Entries

• Permanent entries are those that you add at the NetBIOS configuration prompt (NetBIOS config>). The router saves permanent entries, and they are still available when you restart the router.

• Static entries are those that you enter at the NetBIOS monitoring prompt (NetBIOS>). The router does not save static entries, and they are not available after you restart the router.

• Dynamic entries are those that the router learns through Name-Query and Name-Recognized processing. A timer removes dynamic entries that are not referenced within a configurable amount of time. The router does not save dynamic entries, and they are not available after you restart the router.

• Individual is a NetBIOS individual name.

• Group is a NetBIOS group name.

• Unknown means the router does not yet have information about the name, indicating that a search for the name is not complete.

• Local is an entry the router can reach locally via the bridge network. The router saves the MAC address associated with the name. If route caching is enabled, the router also saves the best LLC route between the router and the NetBIOS station.

• Remote is an entry the router can reach remotely via a DLSw TCP session. The router saves the best TCP sessions.

You can enter NetBIOS names in ASCII and hexadecimal, either separately or intermixed. For example, you would need to enter an adapter address in hexadecimal mode. The default data entry mode is ASCII. To enter hexadecimal mode, type a left angle bracket (<). To return to ASCII mode, type a right angle bracket (>).

Enter add cache-entry at the NetBIOS config> prompt to add permanent entries.

Enter add cache-entry at the NetBIOS> prompt to add static entries.

NetBIOS config>add cache-entry

Enter up to 15 characters of NetBIOS name(no wild cards)[]? nbs<F8>
Enter IP Address [0.0.0.0]? 20.15.8.2

Name cache entry has been created

NetBIOS config>set cache-parms

Significant characters in name [15]? 
Best path aging timeout value in seconds [60.0]? 
Reduced search timeout value in seconds [1.5]? 
Unreferenced entry timeout value in minutes [5000]? 
Max nbr local name cache entries [500]? 
Max nbr remote name cache entries [100]? 

Cache parameters set

From the NetBIOS configuration prompt, you can use the list cache commands in Table 2.

Table 2 NetBIOS List Cache Configuration Commands

Command	Displays . . .
list cache all	All active entries in the router's name cache, including permanent, static, and dynamic entries.
list cache entry-number	A cache entry according to its entry number.
list cache name	A cache entry for a specific NetBIOS name.
list cache ip-address	A cache entry for a specific IP address.

From the NetBIOS monitoring prompt, you can use the list cache commands in Table 3.

Table 3 NetBIOS List Cache Monitoring Commands

Command	Displays . . .
list cache active	All active entries in the router's name cache, including permanent, static, and dynamic entries.
list cache config	Static and permanent entries. Does not show dynamic entries.
list cache group	Entries that exist for NetBIOS group names.
list cache local	Local cache entries. Local cache entries are those that the router learns over the bridge.
list cache name	A cache entry for a specific NetBIOS name.
list cache remote	Remote cache entries. Remote cache entries are those that the router learns over the DLSw WAN.
list cache unknown	Entries where the type of NetBIOS entry is unknown. The router considers all entries unknown until it learns the type of entry.

NetBIOS Name Filtering

• Add-Group-Name-Query (source)

• Add-Name-Query (source)

• Datagram (destination)

• Name-Query (source and destination)

NetBIOS Byte Filtering

To build a byte filter, you specify

• An offset from the beginning of the NetBIOS header

• A byte pattern to match

• An optional mask to apply to the selected fields of the NetBIOS header

About NetBIOS Configuration and Monitoring Commands

Enter NetBIOS monitoring commands at the NetBIOS> prompt. This document refers to changes you make at the monitoring prompt as static. Monitoring commands take effect immediately, but the router does not save them after you restart the router.

Displaying the NetBIOS Configuration Prompt

Changes you make at the NetBIOS config> prompt affect both bridging and DLSw.

1. To display the NetBIOS config> prompt from the Bridge configuration environment, enter protocol bridge at the Config> prompt and netbios at the Bridge Config> prompt.

Config>protocol bridge
Transparent Bridge user configuration
Bridge Config>netbios

NetBIOS Support User Configuration

NetBIOS config>

2. To display the NetBIOS config> prompt from the DLSw configuration environment, enter protocol dls at the Config> prompt and netbios at the DLSw config> prompt.

Config>protocol dls
DLSw protocol user configuration
DLSw config>netbios

NetBIOS Support User Configuration

NetBIOS config>

Changes you make at the NetBIOS> prompt affect both bridging and DLSw.

1. To display the NetBIOS> prompt from the Bridge monitoring environment, enter protocol bridge at the Monitor> prompt and netbios at the Bridge> prompt.

Monitor>protocol bridge
Bridge>netbios

NetBIOS Support User Console

NetBIOS>

2. To display the NetBIOS> prompt from the DLSw monitoring environment, enter protocol dls at the Monitor> prompt and netbios at the DLSw> prompt.

Monitor>protocol dls
DLSw>netbios

NetBIOS Support User Console

NetBIOS>

• To configure name caching parameters, enter set cache-parms.

• To configure duplicate frame filtering, enter set general.

• To configure frame type filtering, enter set filters bridge or set filters dlsw.

• Add name cache entries for DLSw neighbors.

• Open NetBIOS SAPs.

• Set a priority for SNA and NetBIOS sessions.

• Set the maximum NetBIOS frame size.

• Set the memory allocation for NetBIOS UI frames.

You can enter NetBIOS names in ASCII and hexadecimal, either separately or intermixed. See cache-entry for more information. NetBIOS names are case sensitive and must match the case of the network NetBIOS names.

NetBIOS config>add cache-entry
Enter up to 15 characters of NetBIOS name (no wild cards)[] Accounting<0000>
Enter IP Address [0.0.0.0]? 20.2.1.3

Name cache entry has been created

DLSw config>open-sap
Interface # [0]? 
Enter SAP in hex(range 0-F4),'SNA', 'NB' or 'LNM'[4]? nb
SAP F0 opened on interface 0

To do so, at the DLSw config> prompt, enter set priority to set a priority of Critical, High, Medium, or Low for SNA sessions and NetBIOS sessions. Also, set a message allocation that corresponds to a session's priority.

DLSw config>set priority
Priority for SNA DLSw sessions (C/H/M/L) [M]?  H 
Priority for NetBIOS DLSw sessions (C/H/M/L) [M]? 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]? 

• SNA traffic a priority of Critical, and Critical sessions have a message allocation of 4, and

• NetBIOS traffic a priority of Medium, and Medium sessions have a message allocation of 2,

You can change the message allocation for sessions from the default of 4/3/2/1. You must always enter four digits, between 1 and 9, in descending order. For example, if the SNA priority is Critical, the NetBIOS traffic is Medium, and you change the message allocation to 8/7/6/5, the router processes 8 SNA frames before it processes 6 NetBIOS frames, and so on.

Setting the Maximum NetBIOS Frame Size

Setting the Memory Allocation for NetBIOS UI Frames

Note that the number of bytes allocated for NetBIOS is global, and not per session.

DLSw config>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]? 

[C] means the command is available at the NetBIOS config> prompt.

[M] means the command is available at the NetBIOS> prompt.

Table 4 NetBIOS Commands

Command	Function
Add [C] [M]	Adds cache entries to the router's name cache.
Delete [C] [M]	Deletes cache entries that you added using the add cache-entry command.
Disable [C] [M]	Disables duplicate frame filtering and route caching.
Enable [C] [M]	Enables duplicate frame filtering and route caching.
Exit [C] [M]	Returns to the previous prompt.
List [C] [M]	Displays various cache entries and configuration information depending on whether you are at the configuration prompt or the monitoring prompt.
Set [C] [M]	Configures parameters for name caching, duplicate frame filtering, and frame type filtering. Also, displays the NETBIOS Filter config> prompt.

Add [C] [M]

From the configuration prompt, adds a permanent entry. From the monitoring prompt, adds a static entry.

Syntax: add

cache-entry

You can add multiple entries with different IP addresses for a single NetBIOS name. This allows DLSw to send the frame to multiple DLSw neighbors.

You can enter NetBIOS names in ASCII and hexadecimal, either separately or intermixed. For example, you would need to enter an adapter address in hexadecimal mode. The default data entry mode is ASCII. To enter hexadecimal mode, type a left angle bracket (<). To return to ASCII mode, type a right angle bracket (>).

Note: NetBIOS names are case sensitive and must match the case of the network NetBIOS names.

Enter up to 15 characters of NetBIOS name (no wild cards)[] nbserve<F1>
Enter IP Address [0.0.0.0]? 20.2.1.3

Name cache entry has been created

Delete [C]

Syntax: delete

cache-entry

Enter name cache record number [1]? 2

Name cache entry has been deleted

Note: NetBIOS names are case sensitive.

cache-entry

Enter up to 15 characters of NetBIOS name (no wild cards) []? ADMIN
Name cache entry NOT found in Active list for name entered
Name cache entry has NOT been deleted from Active list

Static name cache entry deleted from Config list

Syntax: disable

duplicate-filtering

route-caching

Example: disable duplicate-filtering

Duplicate frame filtering is           OFF

Example: disable route-caching

Route caching is                       OFF

Syntax: enable

duplicate-filtering

route-caching

Example: enable duplicate-filtering

Duplicate frame filtering is            ON

Example: enable route-caching

Route caching is                        ON

Syntax: exit

List [C] [M]

See NetBIOS Name Caching and Route Caching for a description of the types of cache entries.

List [C]

Syntax: list

cache all

cache entry-number

cache name

cache ip-address

filters all

filters bridge

filters dlsw

general

The router displays all hexadecimal data in angle brackets. The number in angle brackets just before the IP address is the 16th character of the NetBIOS name. IBM and Microsoft reserve the 16th character of the NetBIOS name, and it always appears in hexadecimal.

Example: list cache all

Entry  Name                 IP Address
-----  -------------------  ---------------
    1  Accounting     <00>  20.2.1.3       
    2  Notes<00000>   <00>  20.2.3.4      

Example: list cache entry-number

Enter name cache record number [1]? 1

Entry  Name                 IP Address
-----  -------------------  ---------------
    1  Accounting     <00>  20.2.1.3      

Following are examples of valid uses of wildcards that match San Francisco:

*Fran*	S??*?????????
San?Fran?isco	S?*
S*	S?a?n?F?a?c?s?
*o	????????????
isco?	isco$
San?F*	*

Use as many wildcards as you like, up to the maximum number of characters in a NetBIOS name (15 or 16, depending on how many significant characters you configured using the set cache-parms command).

Note: NetBIOS names are case sensitive.

Enter up to 15 characters of NetBIOS name (wild cards ok) []? Acc*

Entry  Name                 IP Address
-----  -------------------  ---------------
    1  Accounting     <00>  20.2.1.3     

Example: list cache ip-address

Enter IP Address [0.0.0.0]? 20.2.1.3

Entry  Name                 IP Address
-----  -------------------  ---------------
    1  Accounting     <00>  20.2.1.3      

Example: list filters all

Bridge name conflict filtering is       OFF
Bridge general bcast filtering is       OFF
Bridge trace control filtering is       OFF

DLS name conflict filtering is          ON
DLS general bcast filtering is          ON
DLS trace control filtering is          ON

Example: list filters bridge

Bridge name conflict filtering is       OFF
Bridge general bcast filtering is       OFF
Bridge trace control filtering is       OFF

Example: list filters dlsw

DLS name conflict filtering is          ON
DLS general bcast filtering is          ON
DLS trace control filtering is          ON

Example: list general

Bridge-only Information:

Bridge duplicate filtering is            OFF
Bridge duplicate frame filter t/o       1.5 seconds

DLS-only Information:

DLS command frame retry count            5
DLS max remote name cache entries      100
DLS command frame retry timeout        0.5 seconds

DLS-Bridge Common Information:

Route caching is                        OFF
Significant characters in name           15
Max local name cache entries            500
Duplicate frame detect timeout          5.0 seconds
Best path aging timeout                60.0 seconds
Reduced search timeout                  1.5 seconds
Unreferenced entry timeout             5000 minutes

Syntax: list

cache active

cache config

cache group

cache local

cache name

cache remote

cache unknown

filters all

filters bridge

filters dlsw

general

statistics cache

statistics frames bridge

statistics frames dlsw

statistics general bridge

statistics general dlsw

The router displays all hexadecimal data in angle brackets. The number in angle brackets just before the IP address is the 16th character of the NetBIOS name. IBM and Microsoft reserve the 16th character of the NetBIOS name, and it always appears in hexadecimal.

If the Name Type field does not specify local, it is a remote entry. For a description of the fields in this display, see the list cache name command on page 28.

Example: list cache active

Cnt NetBIOS Name         Name Type          Entry Type
--- -------------------  -----------------  ----------
 1  HYPERION       <01>  INDIVIDUAL LOCAL   DYNAMIC   
 2  LANGROUP<F8>   <00>  UNKNOWN            STATIC
 3  ACCOUNTING<000><00>  GROUP              PERMANENT   

The router displays all hexadecimal data in angle brackets. The number in angle brackets just before the IP address is the 16th character of the NetBIOS name. IBM and Microsoft reserve the 16th character of the NetBIOS name, and it always appears in hexadecimal.

Example: list cache config

Name                IP Address      Source     Last Mod
------------------  --------------  ---------  ---------
Admin<00000>  <00>  20.3.120.8      STATIC     ADDED  
Finance       <01>  20.4.96.8       PERMANENT  MODIFIED 
Notes         <00>  20.8.210.3      PERMANENT  UNCHANGED

Example: list cache group

Cnt  NetBIOS Name     Entry Type   Loc Path St  Rem Path St
---  ---------------  -----------  -----------  -----------
  2  HYPERION   <01>  DYNAMIC      UNKNOWN         GROUP
  3  EXCEL      <  >  DYNAMIC      GROUP           GROUP

For NetBIOS clients the Local Path State is always Unknown and the MAC Address and Routing Information fields are always empty.

Example: list cache local

Cnt  NetBIOS Name     Loc Path St  MAC Address  Routing Information
---  ---------------  -----------  ----------- --------------------
  2  HYPERION   <01>  UNKNOWN     

Following are examples of valid uses of wildcards that match San Francisco:

*Fran*	S??*?????????
San?Fran?isco	S?*
S*	S?a?n?F?a?c?s?
*o	????????????
isco?	isco$
San?F*	*

Use as many wildcards as you like, up to the maximum number of characters in a NetBIOS name (15 or 16, depending on how many significant characters you configured using the set cache-parms command).

Note: NetBIOS names are case sensitive.

Enter up to 15 characters of NetBIOS name (wild cards ok) []? HYP*
NetBIOS Name         Name Type          Entry Type
-------------------  -----------------  ----------
HYPERION       <01>  INDIVIDUAL REMOTE   DYNAMIC   

Count of name cache entry hits                          2

Age of name cache entry                                 689
Age of name cache last reference                        85

Local path information:

  Loc Path St  Timestamp  MAC Address   LFS   Routing Information
  -----------  ---------  -----------   ---      -----------------------
  UNKNOWN          689

Remote path information:

  Rem Path St  Timestamp  LFS    IP Address(es)
  -----------  ---------  ---        --------------
  BEST FOUND      85      2 52    20.55.27.33 

cache remote

Example: list cache remote

Cnt  NetBIOS Name     Entry Type      Rem Path St       IP Address(es)
---  ---------------  --------------  --------------    --------------
  2  HYPERION   <01>  STATIC          BEST FOUND        20.55.27.33
  3  EXCEL      <00>  STATIC          SEARCH ALL        cache unknown

Example: list cache unknown

Cnt  NetBIOS Name   Entry Type   Loc Path St Rem Path St  IP Address(es)
---  -------------  -----------  ----------- -----------  --------------
  2  HYPERION   <01>  STATIC       UNKNOWN     BEST FOUND   23.21.21.2
  3  EXCEL      <00>  STATIC       UNKNOWN     UNKNOWN      

Example: list filters all

Bridge name conflict filtering is       OFF
Bridge general bcast filtering is       OFF
Bridge trace control filtering is       OFF

DLS name conflict filtering is          ON
DLS general bcast filtering is          ON
DLS trace control filtering is          ON

Example: list filters bridge

Bridge name conflict filtering is       OFF
Bridge general bcast filtering is       OFF
Bridge trace control filtering is       OFF

Example: list filters dlsw

DLS name conflict filtering is          ON
DLS general bcast filtering is          ON
DLS trace control filtering is          ON

Example: list general

Bridge-only Information:

Bridge duplicate filtering is          OFF
Bridge duplicate frame filter t/o      1.5 seconds

DLS-only Information:

DLS command frame retry count            5
DLS max remote name cache entries      100
DLS command frame retry timeout        0.5 seconds

DLS-Bridge Common Information:

Route caching is                       OFF
Significant characters in name          15
Max local name cache entries           500
Duplicate frame detect timeout         5.0 seconds
Best path aging timeout               60.0 seconds
Reduced search timeout                 1.5 seconds
Unreferenced entry timeout            5000 minutes

Example: list statistics cache

Local name cache entries                 1
Remote name cache entries                1
Local individual names                   1
Remote individual names                  0
Group names                              0
Unknown names                            1
Name cache hits                       2194
Name cache misses                        2

Example: list statistics frames bridge

Frames in cache                          0
Name query frames                        0
Status query frames                      0
Add name frames                          0
Add group name frames                    0
Name in conflict frames                  0
Frames not filtered as duplicates        0

Example: list statistics frames dlsw

Name query frames                        0
Status query frames                      0
Add name frames                          0
Add group name frames                    0
Name in conflict frames                  0
Frames not filtered as duplicates        0

Example: list statistics general bridge

Frames received                       1339
Frames discarded                         0
Frames forwarded to bridge            1339
Frames forwarded to DLS               1339

Example: list statistics general dlsw

Frames received                       1339
Frames discarded                         0
Frames forwarded to bridge            1339

Syntax: set

cache-parms

filters bridge

filters byte

filters dlsw

filters name

general

Example: set cache-parms

Significant characters in name [15]? 
Best path aging timeout value in seconds [60.0]? 
Reduced search timeout value in seconds [1.5]? 
Unreferenced entry timeout value in minutes [5000]? 
Max nbr local name cache entries [500]? 
Max nbr remote name cache entries [100]? 

Cache parameters set  

filters bridge

Example: set filters bridge

Filter Name Conflict frames? [No]: y

Name conflict filtering is             ON

Filter General Broadcast frames? [No]: 

General broadcast filtering is         OFF

Filter Trace Control frames? [No]: 

Trace control filtering is             OFF

From the NetBIOS> prompt, displays the NetBIOS filtering monitoring prompt (NETBIOS Filter>).

These prompts allow you to set up NetBIOS name and byte filters.

See Configuring and Monitoring NetBIOS Name and Byte Filters for information on the commands available at this prompt.

Example: set filters byte

NETBIOS Filtering configuration
NETBIOS Filter config>

Example: set filters dlsw

Filter Name Conflict frames? [Yes]: 

Name conflict filtering is              ON

Filter General Broadcast frames? [Yes]: 

General broadcast filtering is          ON

Filter Trace Control frames? [Yes]: 

Trace control filtering is              ON

From the NetBIOS> prompt, displays the NETBIOS Filter> prompt.

These prompts allow you to set up NetBIOS name and byte filters.

See Configuring and Monitoring NetBIOS Name and Byte Filters for a description of the commands available at this prompt.

Example: set filters name

NETBIOS Filtering configuration
NETBIOS Filter config>

Example: set general

WARNING! Setting Duplicate Frame Filter Timeout to zero...
         disables duplicate frame checking!

Duplicate frame filter timeout value in seconds [1.5]? 

Duplicate frame detect timeout value in seconds [5.0]? 

General parameters set

Command frame retry count [5]? 
Command frame retry timeout value in seconds [0.5]?