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New Member

2612 router.

I've got a friend who has a 2612 router. He told me that you can configure Ethernet interfaces as VLAN trunks. I told him that only Fast Ethernet and Gigabit Ethenret interfaces could become VLAN trunks. Am I right?

Also on the router you are able to enter:

Router(config)#interface ethernet 0/0.10

Router(config-subif)#encapsulation isl 10

Router(config)#interface ethernet 0/0.20

Router(config-subif)#encapsulation isl 20

Therefore, the router know's it is an Ethernet only interface, but allows you to configure it as a trunk! You can then issue a 'show vlans' and it displays the vlans configured on the subinterfaces. Unfortunately, he has no device to connect the router to, but can someone explain why we can configure VLAN trunks on Ethernet interfaces?


New Member

Re: 2612 router.

Sorry guys, the trunk encapsulation was supposed to be dot1q - NOT ISL!!

Cisco Employee

Re: 2612 router.

That used to be case. 10 Meg Ethernet dot1q trunks are know supported in IOS, check the release-notes to verify which release supports it.

New Member

Re: 2612 router.

Thanks Richard. The software is 12.0(7)T2 image file: c2600-is-mz.120-7.T2.bin.

Do you know where the link is that explains this' new' feature?

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