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Chapter 11
Troubleshooting Switched Ethernet
!
hostname RSM_A
!
interface Vlan1
description Admin VLAN
ip address 10.1.1.3 255.255.255.0
no ip redirects
standby 1 timers 5 15
standby 1 priority 10
standby 1 preempt
standby 1 ip 10.1.1.1
!
interface Vlan2
description User VLAN
ip address 10.1.2.1 255.255.255.0
!
The show port command provides the following information regarding
the RSM:
4/1 RSM_A connected trunk normal half 400
Route Switch
As noted previously, an external router may be used to connect VLANs
on the Catalyst switch. This usually occurs through a single connection con-
figured for ISL or another trunking protocol. Fast Ethernet and Gigabit
Ethernet connections are common for this configuration.
When configuring the router for this type of connection, each VLAN must
be defined to a subinterface, and the main interface must be configured with-
out a configuration. This usually appears as follows:
interface fastethernet 0/0
no ip address
no shutdown
full-duplex
interface fastethernet 0/0.1
description vlan1
ip address 10.1.1.1 255.255.255.0
encapsulation isl 1
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