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BGP VPNV4 output

grew00028
Level 1
Level 1

Hi,

 

Could someone please explain that why am I seeing this output ? I think I should see just one route, but I see two paths coming from same BGP neighbor and RR, the only difference I see is that best path has Extended community and the other path does not have it.

 

CISCO-ROUTER#sh ip bgp vpnv4 vrf aaaaa-aaaa x.x.138.172
BGP routing table entry for xxx:7775:x.x.138.172/30, version 90963
Paths: (2 available, best #1, table aaaaa-aaaa)
Not advertised to any peer
Refresh Epoch 1
xxx
x.x.54.198 (via vrf aaaaa-aaaa) from x.x.54.198 (y.y.194.116)
Origin IGP, metric 80, localpref 100, valid, external, best
Extended Community: RT:xxx:7775
rx pathid: 0, tx pathid: 0x0


Refresh Epoch 1
xxx, (received-only)
x.x.54.198 (via vrf aaaaa-aaaa) from x.x.54.198 (y.y.194.116)
Origin IGP, metric 80, localpref 100, valid, external
rx pathid: 0, tx pathid: 0 
1 Accepted Solution

Accepted Solutions

Harold Ritter
Spotlight

This is the same path. The received-only on the second entry means that you have configured the "soft-reconfiguration" feature on your vpnv4 neighbor. This unaltered copy is kept just in case you need to do a soft clear to process the path again through the local policy. 

 

BTW, you can now do soft reconfiguration without configuring "soft-reconfiguration" A soft reconfiguration request will be sent to the neighbor, so that the neighbor can resend the bgp updates.

 

Regards,

Regards,
Harold Ritter, CCIE #4168 (EI, SP)

View solution in original post

1 Reply 1

Harold Ritter
Spotlight

This is the same path. The received-only on the second entry means that you have configured the "soft-reconfiguration" feature on your vpnv4 neighbor. This unaltered copy is kept just in case you need to do a soft clear to process the path again through the local policy. 

 

BTW, you can now do soft reconfiguration without configuring "soft-reconfiguration" A soft reconfiguration request will be sent to the neighbor, so that the neighbor can resend the bgp updates.

 

Regards,

Regards,
Harold Ritter, CCIE #4168 (EI, SP)