Re: Native vlan from router to switch

I had to lab it up with a 2811 and 3750G. The trunk link does show up on
the 3750, but there is not any data going across the interface. "sho int "
If you send a ping from the router to an IP on the same subnet, and deb the
output shows the router sending the traffic out the interface, but then
shows encapsulations failed.

I also labed it up on 2 3750g and the CDP gives native vlan mismatch.

Rob

On Thu, Dec 8, 2011 at 10:10 AM, CCIE KID <eliteccie_at_gmail.com> wrote:

> Hi fellas,
>
> I tested a scenario where the Native vlan differs from the router port to
> the switch port. I understood that if the NAtive vlan mismatches on a trunk
> port , then appropriate trunking wont be formed.
> But when i connect my router to a switch and in the router subinterface . I
> am having a native vlan of 20 and in the switch port it is having a native
> vlan of 10 , but still the trunk is forming perfectly
>
> Can someone correct me
> fa0/1.1 fa0/1
> Router1-----------------------------------------------Switch 1
>
> Router 1
>
> inter fa 0/1.1
> encap dot1q 20 native
> ip add 10.1.1.1 255.255.255.0
> no sh
>
>
> Switch 1
>
> int fa 0/1
> enc dot1q 10 native
> swi trunk enc dot
> swi mo trunk
> no sh
>
>
> But s
>
> --
> With Warmest Regards,
>
> CCIE KID
> CCIE#29992 (Security)
>
>
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Received on Thu Dec 08 2011 - 13:21:58 ART