Cisco WS-C4003 Software Guide - Page 271

19 C H A P T E R Checking Port Status and Connectivity This chapter describes how to check switch port status and connectivity on the Catalyst enterprise LAN switches. Note For complete syntax and usage information for the commands used in this chapter, refer to the Command Reference-Catalyst 4000 Family, Catalyst 2948G, and Catalyst 2980G Switches. This chapter consists of these sections: • Checking Module Status, page 19-1 • Checking Port Status, page 19-2 • Checking Port Capabilities, page 19-4 • Using Telnet, page 19-5 • Changing the Login Timer, page 19-6 • Using Secure Shell Encryption for Telnet Sessions, page 19-6 • Monitoring User Sessions, page 19-7 • Using Ping, page 19-8 • Using Layer 2 Traceroute, page 19-10 • Using IP Traceroute, page 19-11 Checking Module Status The Catalyst enterprise LAN switches are multimodule systems. You can see what modules are installed, as well as the MAC address ranges and version numbers for each module, by using the show module command. You can use the [mod_num] arguement to specify a particular module number to see detailed information on that module. The Catalyst 4912G, 2948G, and 2980G switches are fixed-configuration switches, but are logically modular. You must apply configuration commands to the appropriate module. For example, on a Catalyst 2948G series switch, the 24 Fast Ethernet ports belong logically to module 2. 78-12647-02 Software Configuration Guide-Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4 19-1