[c-nsp] VASI interfaces on IOS XR

[Bruce Pinsky]

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Nick Ryce wrote:
> Hi Guys,
> 
> Does anyone know if these type of interfaces can be used without a
> services blade?  Also is there a specific version of XR required?
> 
> I have been scouring documentation and can't really find anything.
> Would InterFlex interfaces do the same thing?  I am looking to have 1
> link in a VRF and the other in a separate VRF.  Then create ospf
> adjacencies do redistribute routes between the 2 VRF tables.  Any
> thoughts?
> 

Are the routes from those different interfaces learned from other OSPF
adjacencies?

Seems like you should just be able to import the routes from the other VRF
via an import statement?  Am I missing what you are trying to do?

VASI interfaces are really designed to allow for services to be applied
prior to label imposition on packets that would be label forwarded toward
the core.  The VASI-left interface serves as a pseudo-CE and the VASI-right
serves as a pseudo-PE.  If the routes you are learning and needing to be
readvertised are coming and going from untagged interfaces, I don't think
VASI is what you need.

- -- 
=========
bep

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