Re: QinQ Question

Routers???

On Mon, Jan 28, 2013 at 8:13 AM, Sean Miller <smiller_at_intergence.com> wrote:
> I have four routers connected in a row R1-R2-R3-R4.
> R1 and R4 are "customer routers" configured with VLAN 10 (10.10.10.1 & .4)
> R2 and R3 are "Provider routers" configured with metro VLAN 100 (100.100.100.2 & .3)
> The goal is to QinQ between R1 and R4 without either router having access to vlan 100.
>
> With the interfaces on R1 and R4 configured as dot1q trunks this works fine with the current config. I'm also L2-tunneling CDP so R1 views R4 as a direct neighbor. R1 can ping R4 but not R2 or R3 - so far so good.
>
> However, if R1 and R4 (dodgy customer for instance) decides to reconfigure R1 and R4's interfaces to access - R1 can still ping R4, but leakage between VLAN 10 and 100 occurs so R1 can also ping R2 and R3...
>
> I have "vlan dot1q tag native" configured on R2 and R3.
>
> Is there a work around so access ports are also tagged with a dot1q header?
>
> Many thanks
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Received on Tue Jan 29 2013 - 15:39:56 ART