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CHAPTER
5-1
Software Configuration Guide—Release 12.2(25)SG
OL-7659-03
5
Checking Port Status and Connectivity
This chapter describes how to check switch port status and connectivity on the Catalyst 4500 series
switch.
This chapter includes the following major sections:
• Checking Module Status, page 5-1
• Checking Interfaces Status, page 5-2
• Displaying MAC Addresses, page 5-3
• Checking Cable Status Using TDR, page 5-3
• Using Telnet, page 5-5
• Changing the Logout Timer, page 5-6
• Monitoring User Sessions, page 5-6
• Using Ping, page 5-7
• Using IP Traceroute, page 5-8
• Using Layer 2 Traceroute, page 5-9
• Configuring ICMP, page 5-11
Note For complete syntax and usage information for the switch commands used in this chapter, refer to the
Catalyst 4500 Series Switch Cisco IOS Command Reference and related publications at
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/index.htm.
Checking Module Status
The Catalyst 4500 series switch is a multimodule system. You can see which 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.