[c-nsp] VASI interfaces on IOS XR

Nick Ryce Nick.Ryce at lumison.net
Wed Feb 22 02:11:01 EST 2012


Hi Bruce,

I was hoping to have an easy way out from import / export :-)


Nick

On 22 Feb 2012, at 00:21, "Bruce Pinsky" <bep at whack.org> wrote:

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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.
>
> - --
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> bep
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