BGP neighbors advertises a VIP HSRP route in addition to peers route

[Louey]

Hi all

I am facing a weird case. I do have two BGP sessions with two different routers (rtr2 and rtr3 from rtr1)  connected via a LAN.

rtr2   rtr3
*       *
*       *
******
   *
   *
 rtr1

rtr2 and rtr3 were running hsrp on this LAN and rtr1 had a static default route to the VIP. As it was creating routing issues in termes of redundancy I did BGP default-information originate and deleted the static default route so BGP can handle that.

The issue is that I am receiving two default routes from each router. One with the routers next-hop (rtr1 and rtr2 IPs) and one with the VIP as the next-hop advertised by both routers with a 100 local-preference. I don t have any BGP peering with the VIP.

I can workarround this issue by increasing the local-pref of routers but I dont understand why this is happening.

Any ideas ?

Regards

[MHM Cisco World]

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13768-hsrp-bgp.html

this link for Your Information 

[paul driver]

Hello
How are you peering between the three rtrs do they share the same ASN or have separate BGP domains?
Or are rtrs 2/3 in the same domain only, either way Rtr should chose just the one default to enter the GRT.

[Louey]

rtr2 and rtr3 are in the same AS.

Regards

[paul driver]

Hello
So unless you have maximum-paths specified then as I stated only a single default should get entered into the global routing table of the RTR1

Can you share your bgp CFG please

All rtrs
sh run | sec router

[Louey]

Thanks for your answer. I do have maximum-path 2 enabled on rtr1 but the route from vip is not installed in the RIB because of the local-pref (-). Which I don't understand is why I do receive a route as a VIP as next-hop with no HSRP enabled on this LAN ( as I disabled it) ?

[paul driver]

Hello

---

@Louey wrote:

Thanks for your answer. I do have maximum-path 2 enabled on rtr1 but the route from vip is not installed in the RIB because of the local-pref (-). Which I don't understand is why I do receive a route as a VIP as next-hop with no HSRP enabled on this LAN ( as I disabled it) ?

---

Based on what you have described you should not be receiving should a route, hence why i requested you post the bgp cfg of all 3 rtrs.

sh run | sec router
sh ip bgp
sh ip bgp summary
sh ip route bgp
sh ip bgp 0.0.0.0

[MHM Cisco World]

the neighbor is static config  or it dynamic with listen group 
are you use any listen group 

[Louey]

I have 2 static BGP neighbor rtr2 and rtr3.

Thanks

[MHM Cisco World]

are the connection is iBGP between these routers ??

[Louey]

ebgp

[MHM Cisco World]

I will run lab and see, 
the next-hop must be same peer you config not VIP of far HSRP group
but let me check 

[MHM Cisco World]

I run lab and as I guess, 
the next-hop is Peer IP you config there is no VIP
are you use some kind of route server ?? 
are you use unchange next-hop ??