Cisco WS-C2980G-A Software Guide - Page 335

20 C H A P T E R Checking Status and Connectivity This chapter describes how to check switch 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 Catalyst 4500 Series, Catalyst 2948G, and Catalyst 2980G Switches Command Reference. This chapter consists of these sections: • Checking Module Status, page 20-1 • Checking Port Status, page 20-2 • Displaying the Port MAC Address, page 20-4 • Displaying Port Capabilities, page 20-5 • Using Telnet, page 20-6 • Changing the Login Timer, page 20-6 • Using Secure Shell Encryption for Telnet Sessions, page 20-7 • Monitoring User Sessions, page 20-8 • Using Ping, page 20-9 • Using Layer 2 Traceroute, page 20-11 • Using IP Traceroute, page 20-12 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] argument 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. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 20-1