[j-nsp] Juniper MX VPLS S-Tag pop/push with QoS

[Adam Vitkovsky]

Mike,

> Of Nealon, Mike
> Sent: Friday, November 06, 2015 5:58 PM
> Hello, does anybody have knowledge of the order of operations relative to
> QoS classification of a packet when using a pop/push mechanism in a VPLS
> instance? I'm trying to make sure packets are classified based on the S-Tag
> that I am "popping", but I fear the pop may happen before the classification.
> I need the QoS/P-Bit information in the S-Tag to persist across the network.
> So I guess the actual question is: How is QoS information persistence
> achieved when you need to also provide VLAN ambiguity?
>
I think QOS has to be done before tag manipulation otherwise you could be POP-ing the S-Tag on frames that are going to be dropped anyways which is not efficient.

adam


        Adam Vitkovsky
        IP Engineer

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