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Encapsulation wont work

I am trying to set up subinterfaces on a cisco 1720 router.

i am running IOS version:

System flash directory:

File Length Name/status

1 4654424 c1700-sy-mz.122-10a.bin (12.2.10a IP/PLUS )

What I am trhing to emulate is the configuration below on this specific router. the config below is a cut and past from a different box.

interface FastEthernet0/0.12

description * Mobile VLAN 12 *

encapsulation dot1Q 12

ip address 10.23.1.3 255.255.255.0

ip pim sparse-dense-mode

ip cgmp

any help would be appreciated

Thanks

- Rich

1 REPLY
Cisco Employee

Re: Encapsulation wont work

1700 series routers do not support trunking on the FastEthernet interfaces

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