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Routing ma'm how i can create subinterface on router for intervaln and what is the command for creating subinterface on 2500series router

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Show ip int brief This will show you the available interfaces and type.If you want to create on Fa0/0 for example the config will be as follows:
On configuration mode type
Interface fa0/0.[vlan Id]
encapsulation isl | dot1q [Vlan id]
Assuming you are using dot1q and terminating vlan 200 The config is as follows
int fa0/0.200
encapsulation dot1q 200
ip address --------

on Gig Port

Int gi0/0.200
encapsulation dot1q 200
ip address

The encapsulation used should match the switch trunk.Default encapsulation is isl on cisco switch.If you are connecting another vendor use dot1q encapsulation.

Posted on Dec 30, 2007


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