Strange behavior in a VRF switch with redistribution

Experts,

I am seeing a strange behavior and it has me purplexed. I have a 6500 that
I am running 2 VRF's on (no mpls) to isolate a guest network. On this same
switch I have BGP running to another site and mutual redist between OSPF and
BGP. No where on the core am I setting any route tags to any routes, but
when I look at the other side of the WAN circuit I am seeing routes come
across with the BGP AS# for a route tag.

-D1-WS2#sho ip route 207.16.70.0
Routing entry for 207.16.70.0/24
  Known via "ospf 1", distance 110, metric 17
  Tag 65534, type extern 1
  Last update from 10.218.80.186 on TenGigabitEthernet1/1, 02:15:42 ago
  Routing Descriptor Blocks:
  * 10.218.80.186, from 10.173.0.194, 02:15:42 ago, via
TenGigabitEthernet1/1
      Route metric is 17, traffic share count is 1
      Route tag 65534

And if I look at the site with the VRF installed I see the info below

D1-CS1#sho ip route 207.16.70.0
Routing entry for 207.16.70.0/24
  Known via "bgp 65002", distance 120, metric 27
  Tag 65001, type external
  Redistributing via ospf 1
  Advertised by ospf 1 subnets
  Last update from 1.1.1.1 3d06h ago
  Routing Descriptor Blocks:
  * 1.1.1.1, from 1.1.1.1, 3d06h ago
      Route metric is 27, traffic share count is 1
      AS Hops 1
      Route tag 65001
      MPLS label: none

I can only guess this is happening b/c of the VRF's on the 6500. On the 6500
I can also see it has a place for the MPLS label (guess it is b/c of the
VRF's also? Can any one confirm this type of behavior?

Thanks
Christopher

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Received on Wed Mar 31 2010 - 16:22:35 ART