Hi all!
Please help me with recursion to caclulate bgp_next_hop using IGP.
I have 2 router "A" and "B" connected to each other via iBGP. Each of
the routers has connection to the outside world in different AS and get
full view. "A" has a eBGP session to the neighbor "A2" and "B" has a
eBGP session to the neighbor "B2". I configure "gateway recursive;
direct;" on iBGP.
In this case, all the routes from the A2 got to B via A are as unreachable.
A IP: 95.174.97.1/26
A2 IP: 188.43.24.90/30
B: 95.174.97.33/26
B2: 87.245.238.204/31
This is debug from birdcl router B:
bird ~ # birdcl 'show route for 37.231.192.1' table master all
BIRD 1.6.3 ready.
37.231.192.0/22 via 87.245.238.204 on vlan91-retn [retn_ipv4
07.08.2017 11:06:57] * (100) [AS47589i]
Type: BGP unicast univ
BGP.origin: IGP
BGP.as_path: 9002 15412 9155 47589
BGP.next_hop: 87.245.238.204
BGP.med: 999
BGP.local_pref: 100
BGP.community: (9002,9002) (9002,64679) (49037,0) (49037,10001)
unreachable [twix_ipv4 07.08.2017 17:17:17 from
95.174.97.1] (100) [AS47589i]
Type: BGP unicast univ
BGP.origin: IGP
BGP.as_path: 20485 15412 9155 47589
BGP.next_hop: 188.43.24.90
BGP.med: 999
BGP.local_pref: 100
BGP.community: (20485,22007) (20485,22307) (49037,0)
bird ~ # birdcl 'show route for 188.43.24.90' table master all
BIRD 1.6.3 ready.
188.43.24.88/30 via 95.174.97.1 on vlan8 [twix_ipv4 07.08.2017
17:17:17] * (100) [i]
Type: BGP unicast univ
BGP.origin: IGP
BGP.as_path:
BGP.next_hop: 95.174.97.1
BGP.med: 0
BGP.local_pref: 500
BGP.community: (49037,49037)
bird ~ # birdcl 'show route for 95.174.97.1' table master all
BIRD 1.6.3 ready.
95.174.97.0/26 dev vlan8 [direct1 07.08.2017 00:20:09] * (240)
Type: device unicast univ
via 95.174.97.1 on vlan8 [twix_ipv4 07.08.2017
17:17:17] (100) [i]
Type: BGP unicast univ
BGP.origin: IGP
BGP.as_path:
BGP.next_hop: 95.174.97.1
BGP.med: 0
BGP.local_pref: 500
BGP.community: (49037,49037)
--
Regards,
Mikhail V. Majorov
