[c-nsp] EVC/EFP - Longest match VLAN stack length

Mattias Gyllenvarg mattias at gyllenvarg.se
Thu Dec 12 03:22:58 EST 2013


Hi

I have not verified but the more specific one should be before the general
rule.
So you should switch them around.

interface TenGigabitEthernet0/1
 service instance 10 ethernet
  encapsulation dot1q 10 second-dot1q 555
  rewrite ingress tag pop 1 symmetric
  bridge-domain 10555

 service instance 20 ethernet
  encapsulation dot1q 10 second-dot1q any
  rewrite ingress tag pop 1 symmetric
  bridge-domain 10000

 service instance 30 ethernet
  encapsulation dot1q 10
  rewrite ingress tag pop 1 symmetric
  bridge-domain 10

In this case, though not tested, a packet tagged 10+555 would be sent too
bd10555 and 10+any to bd10000 and then 10+non to bd10.

//Mattias Gyllenvarg
Obduro Network AB



On Wed, Dec 11, 2013 at 3:51 PM, Arash Alizadeh <arash.a at hotmail.se> wrote:

> Hi,
>
> I wonder if anyone knows if you in two seperate EFP's could match the same
> outermost tag where one matches a single-tagged frame and the other one
> matches it when it's stacked .
>
> I.e:
>
> interface TenGigabitEthernet0/1
>  service instance 1 ethernet
>   encapsulation dot1q 10
>   rewrite ingress tag pop 1 symmetric
>   bridge-domain 10
>  !
>  service instance 2 ethernet
>   encapsulation dot1q 10 second-dot1q any
>   rewrite ingress tag pop 1 symmetric
>   bridge-domain 20
> !
>
> Unfortunately I'm not able to try this myself and I havn't found anything
> on the web covering this scenario.
>
> Thanks in advance.
>
> Arash
>
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-- 
*Med Vänliga Hälsningar*
*Mattias Gyllenvarg*


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