The MPLS-OPS Archive

[Robert Raszuk <raszuk@cisco.com>]

<Removing ppvpn leaving mpls-ops>

Hi Juha,

> in the "per platform case", how does cisco prevent packet misdelivery
> due to incorrect incoming label?

First I don't see a relation of your first part of the question the the
second one. You may have multiple interfaces to the core and per
interface label space will not buy you much as far as the VPN label
processing is of concern. 

Now to answer the second part we do the following:

* For packet with labels comming from CE (Carrier's Carrier case) we do
check if packet is comming with a label advertised to a given site by
PE. If this check fails the packet is discarded.

* For packet with labels comming from a SP backbone to the PE we don't
check the VPN label - to be honest I am not even sure what should the
check look like in either case per platform or per interface label space
....

Rgs,
R.

> Juha Heinanen wrote:
> 
> Rajiv Asati writes:
> 
>  > It depends.
>  > The router can do both....  "per platform label space" for Frame Mode MPLS,
>  > whereas "per interface" for Cell Mode MPLS.
>  > Please see the details here:
> 
> in the "per platform case", how does cisco prevent packet misdelivery
> due to incorrect incoming label?
> 
> -- juha

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