Dual WAN - Accept default route from Provider

[noc]

Hello all,

I have a Cisco 1941 Series with two separate BGP connections to my ISP. This is still in the testing phase so I can try everything I want.

The Cisco announces a prefix to the ISP via both BGP sessions and in return the ISP (a Juniper MX router) sends a default route back.

Now, both sessions have been established and I see the prefix announced from the Cisco, but it seems that the Cisco doesn't yet receive/accept its the default route announced from the Juniper.

Juniper sending default route:

term advertise-default {
    from {
         route-filter 0.0.0.0/0 exact;
    }
    then {
        next-hop self; 
        accept;
    }
}
term reject-rest {
    then reject'
}

This is the relevant Cisco configuration:

router bgp 65413
 bgp log-neighbor-changes
 neighbor 185.159.125.9 remote-as 202120
 neighbor 185.159.125.9 description "Via Colt"
 neighbor 185.159.125.13 remote-as 202120
 neighbor 185.159.125.13 description "Via 4G"
 !
 address-family ipv4
  network 185.52.208.6 mask 255.255.255.254
  neighbor 185.159.125.9 activate
  neighbor 185.159.125.9 prefix-list default-route in
  neighbor 185.159.125.9 prefix-list transit-out-v4 out
  neighbor 185.159.125.13 activate
  neighbor 185.159.125.13 prefix-list default-route in
  neighbor 185.159.125.13 prefix-list transit-out-v4 out
 exit-address-family
!
ip prefix-list BGP_DEFAULT_ACL seq 5 permit 0.0.0.0/0
!
ip prefix-list default-route seq 10 permit 0.0.0.0/0
!
ip prefix-list transit-out-v4 seq 1 permit 0.0.0.0/0
ip prefix-list transit-out-v4 seq 5 permit 185.159.125.176/30
ip prefix-list transit-out-v4 seq 10 permit 185.52.208.6/31
access-list 23 permit any

I couldn't find any configuration about a Cisco accepting the default route. I've tried the Juniper configuration with a Mikrotik as client and it happily accepted the default route.

What am I doing wrong here?

Marijn

[a.alekseev]

sh ip bgp

sh ip route

[noc]

Allin-RTR#sh ip bgp

BGP table version is 3, local router ID is 185.159.125.14

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

              r RIB-failure, S Stale, m multipath, b backup-path, x best-external, f RT-Filter

Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path

*> 0.0.0.0          185.159.125.9            0             0 202120 i

*> 185.52.208.6/31  0.0.0.0                  0         32768 i

show ip route

B*    0.0.0.0/0 [20/0] via 185.159.125.9, 1d21h

Well, I guess it the config above works after all.. We did some changes the other day but didn't see any improvement back then.

The discussion can be closed :)