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This chapter describes how to perform various administrative tasks on Catalyst 5000, 4000, 2948G, and 2926G series switches.
This chapter consists of these sections:
The system name on the switch is a user-configurable string used to identify the device. The default configuration has no system name configured.
If you do not manually configure a system name, the system name is obtained through DNS if you configure the switch as follows:
If the DNS lookup is successful, the DNS host name of the switch is configured as the system name of the switch and is saved in NVRAM (the domain name is removed).
If you have not configured a system prompt, the first 20 characters of the system name are used as the system prompt (a greater-than symbol [>] is appended). The prompt is updated whenever the system name changes, unless the prompt is manually configured using the set prompt command.
The switch performs a DNS lookup for the system name whenever one of the following occurs:
If the system name is user configured, no DNS lookup is performed.
These sections describe how to statically configure the system name and prompt:
To statically configure the system name, perform this task in privileged mode:
| Task | Command |
|---|---|
Statically set the system name. | set system name name_string |
This example shows how to set the system name on the switch:
Console> (enable) set system name Catalyst 5000 System name set. Catalyst 5000> (enable)
To statically configure the system prompt, perform this task in privileged mode:
| Task | Command |
|---|---|
Statically set the system prompt. | set prompt prompt_string |
This example shows how to statically configure the system prompt on the switch:
Console> (enable) set prompt Catalyst5500> Catalyst5500> (enable)
To clear the system name, perform this task in privileged mode:
| Task | Command |
|---|---|
Clear the system name. | set system name |
This example shows how to clear the system name:
Console> (enable) set system name System name cleared. Console> (enable)
You can specify the system contact and location to help you with resource management tasks.
To specify the system contact and location, perform this task in privileged mode:
| Task | Command |
|---|---|
Step 1 Set the system contact. | set system contact [contact_string] |
Step 2 Set the system location. | set system location [location_string] |
Step 3 Verify the global system information. | show system |
This example shows how to specify the system contact and location and verify the configuration:
Catalyst 5000> (enable) set system contact sysadmin@corp.com System contact set. Catalyst 5000> (enable) set system location Sunnyvale CA System location set. Catalyst 5000> (enable) show system PS1-Status PS2-Status Fan-Status Temp-Alarm Sys-Status Uptime d,h:m:s Logout ---------- ---------- ---------- ---------- ---------- -------------- --------- ok none ok off ok 0,04:04:07 20 min PS1-Type PS2-Type Modem Baud Traffic Peak Peak-Time ---------- ---------- ------- ----- ------- ---- ------------------------- other none disable 9600 0% 0% Tue Jun 23 1998, 16:51:36 System Name System Location System Contact ------------------------ ------------------------ ------------------------ Catalyst 5000 Sunnyvale CA sysadmin@corp.com Catalyst 5000> (enable)
To set the system clock, perform this task in privileged mode:
| Task | Command |
|---|---|
Step 1 Set the system clock. | set time [day_of_week] [mm/dd/yy] [hh:mm:ss] |
Step 2 Display the current date and time. | show time |
This example shows how to set the system clock and display the current date and time:
Console> (enable) set time Mon 06/15/98 12:30:00 Mon Jun 15 1998, 12:30:00 Console> (enable) show time Mon Jun 15 1998, 12:30:02 Console> (enable)
You can create a single or multiline message banner that appears on the screen when someone logs in to the switch. The first character following the motd keyword is used to delimit the beginning and end of the banner text. Characters following the ending delimiter are discarded. After entering the ending delimiter, press Return. The banner must be fewer than 255 characters.
To configure a login banner, perform this task in privileged mode:
| Task | Command |
|---|---|
Step 1 Enter the message of the day. | set banner motd c message_of_the_day c |
Step 2 Display the login banner by logging out and logging back into the switch. |
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This example shows how to set the login banner on the switch using the # symbol as the beginning and ending delimiter:
Console> (enable) set banner motd # Welcome to the Catalyst 5000 Switch! Unauthorized access prohibited. Contact sysadmin@corp.com for access. # MOTD banner set Console> (enable)
To clear the login banner, perform this task in privileged mode:
| Task | Command |
|---|---|
Clear the message of the day. | set banner motd cc |
This example shows how to clear the login banner:
Console> (enable) set banner motd ## MOTD banner cleared Console> (enable)
You can use the set alias command to define command aliases (shorthand versions of commands) for frequently used or long and complex commands. Command aliases can save you time and can help prevent typing errors when you are configuring or monitoring the switch.
The name argument defines the command alias. The command and parameter arguments define the command to enter when the command alias is entered at the command line.
To define a command alias on the switch, perform this task in privileged mode:
| Task | Command |
|---|---|
Step 1 Define a command alias on the switch. | set alias name command [parameter] [parameter] |
Step 2 Verify the currently defined command aliases. | show alias [name] |
This example shows how to define two command aliases, sm8, that issues the show module 8 command, and sp8, that issues the show port 8 command. This example also shows how to verify the currently defined command aliases and what happens when you enter the command aliases at the command line:
Console> (enable) set alias sm8 show module 8 Command alias added. Console> (enable) set alias sp8 show port 8 Command alias added. Console> (enable) show alias sm8 show module 8 sp8 show port 8 Console> (enable) sm8 Mod Module-Name Ports Module-Type Model Serial-Num Status --- ------------------- ----- --------------------- --------- --------- ------- 8 2 DS3 Dual PHY ATM WS-X5166 007243262 ok Mod MAC-Address(es) Hw Fw Sw --- -------------------------------------- ------ ---------- ----------------- 8 00-60-2f-45-26-2f 2.0 1.3 51.1(103) Console> (enable) sp8 Port Name Status Vlan Level Duplex Speed Type ----- ------------------ ---------- ---------- ------ ------ ----- ------------ 8/1 notconnect trunk normal full 45 DS3 ATM 8/2 notconnect trunk normal full 45 DS3 ATM Port ifIndex ----- ------- 8/1 285 8/2 286 Use 'session' command to see ATM counters. Last-Time-Cleared -------------------------- Thu Sep 10 1998, 16:56:08 Console> (enable)
You can use the set ip alias command to define textual aliases for IP addresses. IP aliases can make it easier to refer to other network devices when using ping, telnet, and other commands, even when Domain Name System (DNS) is not enabled.
The name argument defines the IP alias. The ip_addr argument defines the IP address to which the name refers.
To define an IP alias on the switch, perform this task in privileged mode:
| Task | Command |
|---|---|
Step 1 Define an IP alias on the switch. | set ip alias name ip_addr |
Step 2 Verify the currently defined IP aliases. | show ip alias [name] |
This example shows how to define two IP aliases, sparc, that refers to IP address 172.20.52.3, and cat5509, that refers to IP address 172.20.52.71. This example also shows how to verify the currently defined IP aliases and what happens when you use the IP aliases with the ping command:
Console> (enable) set ip alias sparc 172.20.52.3 IP alias added. Console> (enable) set ip alias cat5509 172.20.52.71 IP alias added. Console> (enable) show ip alias default 0.0.0.0 sparc 172.20.52.3 cat5509 172.20.52.71 Console> (enable) ping sparc sparc is alive Console> (enable) ping cat5509 cat5509 is alive Console> (enable)
In some situations, you might need to add a static routing table entry for one or more destination networks. Static route entries consist of the destination IP network address, the IP address of the next hop router, and the metric (hop count) for the route.
In software release 5.1 and later, the destination IP network address can be variably subnetted to support Classless Interdomain Routing (CIDR). You can specify the subnet mask (netmask) for a destination network using the number of subnet bits or using the subnet mask in dotted decimal format. If no subnet mask is specified, the default (classful) mask is used.
The switch forwards IP traffic generated by the switch using the longest address match in the IP routing table. The switch does not use the IP routing table to forward traffic from connected devices, only IP traffic generated by the switch itself (for example, Telnet, TFTP, and ping).
In software releases prior to release 5.1, the classful subnet mask is always used (you cannot specify the subnet mask for the destination network).
To configure a static route, perform this task in privileged mode:
| Task | Command |
|---|---|
Step 1 Configure a static route to the remote network. | set ip route destination[/netmask] gateway [metric] |
Step 2 Verify that the static route appears correctly in the IP routing table. | show ip route |
This example shows how to configure a static route on the switch and how to verify that the route is configured properly in the routing table:
Console> (enable) set ip route 172.16.16.0/20 172.20.52.127 Route added. Console> (enable) show ip route Fragmentation Redirect Unreachable ------------- -------- ----------- enabled enabled enabled The primary gateway: 172.20.52.121 Destination Gateway RouteMask Flags Use Interface --------------- --------------- ---------- ----- -------- --------- 172.16.16.0 172.20.52.127 0xfffff000 UG 0 sc0 default 172.20.52.121 0x0 UG 0 sc0 172.20.52.120 172.20.52.124 0xfffffff8 U 1 sc0 default default 0xff000000 UH 0 sl0 Console> (enable)
Posted: Mon Jul 19 12:41:33 PDT 1999
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