[c-nsp] VRF forwarding limits on SVI?

[Ian Cox]

At 02:20 PM 7/19/2007 -0400, Chris Griffin wrote:
>Are we going to see eompls support on SVIs at some point on the 
>Sup720 (PFC MPLS)?


There is a special case of EoMPLS being supported on an SVI for 
Sup720 which is referred to as mux-uni.
http://www/en/US/products/hw/routers/ps368/products_configuration_guide_chapter09186a0080699477.html#wp1406020

This feature allows for general L2 connectivity, and IPv4/IPv6/MPLS 
routed connectivity to be mixed with vlans that one is doing EoMPLS 
for on a single interface. If you are after L2 local switching 
between ethernet ports on the same box and then transport that over 
EoMPLS then no. To support EoMPLS on SVI with local switching you 
need to support address learning. The Sup720 PFC/DFC implementation 
does not allow for address learning. In fact doing EoMPLS on an SVI 
one could construe as VPLS with a single spoke. The PFC3x/DFC3x can 
not support this. That is not to say that next generations of 
PFC?x/DFC?x will not support this :) The reason why the SIP/SPA/OSM 
modules can support local switching is that they are doing the label 
imposition rather than PFC. The PFC in this case sees the packet purely at L2.


Ian

>  I have heard yes, but future code, and then no unless you have SIP/SPAs.
>
>Thanks!
>Chris
>
>Ian Cox wrote:
>>At 11:02 AM 7/19/2007 -0400, Jeff Kell wrote:
>>>6500 Sup-II/MSFC2/PFC2 can't do SVI VRF forwarding?
>>>
>>>>UTC-6509(config)#interface Vlan801
>>>>UTC-6509(config-if)# description No Man's LAN ring 1
>>>>UTC-6509(config-if)# ip vrf forwarding no-mans-lan
>>>>%This interface does not support ip vrf forwarding
>>>Say it ain't so...?   IOS c6sup22-jk2s-mz.121-26.E5.
>>It is so, VRFs are not supported on SVIs on Sup2, you need Sup720 
>>for vrf support on SVIs. Sup2 PFC hardware was not designed to support VRFs.
>>
>>Ian
>>
>>>Jeff
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>--
>Chris Griffin                           cgriffin at ufl.edu
>Sr. Network Engineer - CCNP             Phone: (352) 273-1051
>CNS - Network Services                  Fax:   (352) 392-9440
>University of Florida/FLR               Gainesville, FL 32611