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Chapter 1
Introduction and Planning
The GTS 205 and GTS 250 provide routing and bridging across LANs and WANs. These routers support routing for multiple network protocols over a variety of media, as well as four types of bridging. They also contain a Simple Network Management Protocol (SNMP) agent. You can manage these routers using network management systems that implement certain SNMP management information base (MIB) standards.
This chapter covers the following topics:
Models of the GTS 205
Models of the GTS 250 3
Indicator Lights
Reset Button
Configuring Your GTS 205 and GTS 250
Accessing Your GTS 205 and GTS 250
Models of the GTS 205
There are two models of the GTS 205 that support different types of networks.
Figure 1-1 shows the combinations of LAN and WAN connections available on the GTS 205.
Figure 1-1 GTS 205 Back Panel
Models of the GTS 250
There are three models of the GTS 250 that support different types of networks.
Figure 1-2 and Figure 1-3 show the combinations of LAN and WAN connections available on the various models of the GTS 250.
Figure 1-2 GTS 250 Back Panel
Figure 1-3 GTS 250 Back Panel (Continued)
Indicator Lights
The GTS 205 and GTS 250 have lights that indicate success (green) or failure (amber) of the system and of individual ports. These lights appear on the rear panel and on the front panel.
Reset Button
Figure 1-4 and Figure 1-5 show the Reset button on the GTS 205 and
GTS 250 respectively. If you press the Reset button and let go, it executes a warm start. If you press the Reset button and hold it depressed for 4 seconds or longer, it executes a cold start, including POST (Power On Self Test).
If you have configured your GTS to write the contents of system memory over the network to a file when a system failure occurs (dump), it works as follows:
Note: The Reset button is recessed to prevent accidental activation. Use the point of a pen to depress it.
Figure 1-4 GTS 205 Reset Button
Figure 1-5 GTS 250 Reset Button
Configuring Your GTS 205 and GTS 250
The GTS 205 and GTS 250 support Quick Config, which prompts you for information to configure interfaces, bridging protocols, selected routing protocols, and boot records. After creating a minimal configuration, you can transfer a complete configuration to your GTS using the Trivial File Transfer Protocol (TFTP), or you can finish a configuration through router console menus.
To use Quick Config, you must attach an ASCII terminal to your router. See Chapter 2 for information on how to attach an ASCII terminal. See
Chapter 3 for information on how to use Quick Config.
Accessing Your GTS 205 and GTS 250
You can access your GTS either locally or remotely. Access your router locally by attaching to a service port. Access your router remotely through
Local Access
Access your GTS locally by attaching an ASCII terminal or personal computer (with the appropriate emulation software) to the Service Port (on the GTS 205) and the Service 1 Port (on the GTS 250). Use local access to perform the following tasks:
Remote Access
After a GTS becomes active on the network, remote access could be the most convenient method of accessing the router. You can use remote access to
Remote Access Through Telnet
Telnet is a protocol in the TCP/IP (Transmission Control Protocol/Internet Protocol) protocol suite. It provides remote access and control of one host from another host on the IP network. Telnet lets you use the local workstation as if it were directly connected to the remote host.
To use Telnet, you must know
Remote Access Through a Service Port
You can access the GTS remotely by attaching a modem to a service port on your router.
Remote access lets you configure or monitor your router at branch offices and other remote sites.
To resolve a problem with your router, service personnel can request permission to establish a temporary, remote connection to the router.
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