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Webcast-Catalyst9k
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another 2610 question: trunking on the ethernet interface

You an now setup trunking on the ethernet interface of the 2610 router. I am running 12.2.11T IP Plus

I am running a trunk between the router and a cat 3524 switch, the configs all work ok on a standard Fast ethernet interfaced router.

The address of the switch is on the default vlan 1

I found that devices on connectto Vlans 55 and 56 on the switch could ping the router ok, but devices on the default vlan could not, nor could the switch ping the router.

It seems to me that the native Vlan does not work on a dot1q trnk when configured on a 2610 ethernet interface... comments please.

interface Ethernet0/0

no ip address

full-duplex

!

interface Ethernet0/0.1

description Management Vlan 1 subnet 57 kelso

encapsulation dot1Q 1 native

ip address 172.16.57.254 255.255.255.0

no ip redirects

no ip mroute-cache

!

interface Ethernet0/0.55

description Data Vlan subnet 55 Kelso

encapsulation dot1Q 55

ip address 172.16.55.254 255.255.255.0

traffic-shape group 110 64000 8000 8000 1000

traffic-shape group 111 64000 8000 8000 1000

h323-gateway voip bind srcaddr 172.16.55.254

!

!

interface Ethernet0/0.56

description IP Phone Vlan subnet 56 Kelso

encapsulation dot1Q 56

ip address 172.16.56.254 255.255.255.0

no ip redirects

!

1 REPLY
Cisco Employee

Re: another 2610 question: trunking on the ethernet interface

You have bug CSCea47421. Here are the release notes. You will have to use the workaround to get it to work.

Release-note:

-------------

Trunking is broke after configuring 'Native' keyword on router subinterface.

Trunk is up/up but no data will pass.

Ex. non-working config.

---------------------------------

!

interface Ethernet0/0

no ip address

full-duplex

interface Ethernet0/0.10

encapsulation dot1Q 10 native

ip address 10.1.1.2 255.255.255.0

end

Workaround

------------------

***Ex. working config.***

------------------------------------

!

interface Ethernet0/0

ip address 10.1.1.2 255.255.255.0

full-duplex

end

I hope this helps!

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