BGP default-originate in Active-Standby scenario

Hello,

I'm not struggling with setting up BGP between Cisco ARS routers and LTM Viprion4800 between two vrf's Internet and Public Access but rather with the redistribution...

 neighbor 1.2.3.4 remote-as 12345

 neighbor 1.2.3.4 description Public Acesss

 neighbor 1.2.3.4 advertisement-interval 0

 neighbor 1.2.3.4 default-originate

 neighbor 1.2.3.4 soft-reconfiguration inbound

 neighbor 1.2.3.4 route-map accept-inbound-Public Access in

 neighbor 1.2.3.4 route-map accept-outbound-Public Access out

 neighbor 4.3.2.1 remote-as 12345

 neighbor 4.3.2.1 description NLHRL1PE01-IA

 neighbor 4.3.2.1 advertisement-interval 0

 neighbor 4.3.2.1 soft-reconfiguration inbound

 neighbor 4.3.2.1 route-map accept-default-route in

 neighbor 4.3.2.1 route-map accept-outbound-TCIA out

This is done on the both LTM nodes, the active and the standby, so by using default-originate, the two Cisco routers in vrf Public Access gate receive two different default gateways...

*> 0.0.0.0/0     1.2.3.4              0 65423 i

and

*> 0.0.0.0/0     1.2.3.5             0 65423 i

This cannot be good ?! So how can we make a difference between the two routes to the LTM active/standby members?

If we do AS-prepend=1 on LTM node1 and AS-prepend=5 on LTM node2,

in case of issues and a failover of LTM takes place, the BGP is still advertised with AS-prepend=5 and BGP shortest path leads to the standby member with AS-prepend=1

How can we overcome this routing scenario ?