Hello! I would like use ECMP for 0.0.0.0/0. This route announced on 10.10.97.33, 10.10.97.72, 10.10.97.73 as LSA5. Below I have given the output of the command on the router 10.10.97.67. I expected to see a default route through 2 interfaces C3 to D1, but next hops not merge. Maybe I misunderstand the work "merge external on". I expected that the bird would combine routes from different routers for the same destination although OSPF.metric1 or OSPF.metric2. bird>show route for10.10.97.73 table igpcoret4 all Table igpcoret4: 10.10.97.73/32unicast [igpcore4 20:05:45]*E2 (150/310/10000)[10.10.97.73] via 10.112.0.14 on C3 weight 40 via 10.112.0.28 on D1 weight 40 Type:OSPF-E2 univ OSPF.metric1:310 OSPF.metric2:10000 OSPF.tag:0x00000000 OSPF.router_id:10.10.97.73 bird>show route for10.10.97.72 table igpcoret4 all Table igpcoret4: 10.10.97.72/32unicast [igpcore4 20:05:45]*E2 (150/2300/10000)[10.10.97.72] via 10.112.0.14 on C3 Type:OSPF-E2 univ OSPF.metric1:2300 OSPF.metric2:10000 OSPF.tag:0x00000000 OSPF.router_id:10.10.97.72 bird>show route for10.10.97.33 table igpcoret4 all Table igpcoret4: 10.10.97.33/32unicast [igpcore4 20:05:45]*E2 (150/300/10000)[10.10.97.33] via 10.112.0.14 on C3 Type:OSPF-E2 univ OSPF.metric1:300 OSPF.metric2:10000 OSPF.tag:0x00000000 OSPF.router_id:10.10.97.33 bird>show route for0.0.0.0/24table igpcoret4 all Table igpcoret4: 0.0.0.0/0unicast [igpcore4 20:05:45]*E2 (150/300/10000)[10.10.97.33] via 10.112.0.14 on C3 Type:OSPF-E2 univ OSPF.metric1:300 OSPF.metric2:10000 OSPF.tag:0x00000000 OSPF.router_id:10.10.97.33 bird>
showospf state all igpcore4 area 0.0.0.0 router 10.10.97.33 distance 300 router 10.10.97.72metric 2000 router 10.10.97.72metric 2000 router 10.10.97.72metric 2000 router 10.10.97.72metric 2000 router 10.10.97.73metric 10 router 10.10.97.67metric 300 router 10.10.97.66metric 300 router 10.10.97.68metric 65535 stubnet 10.112.0.0/31metric 2000 stubnet 10.112.0.2/31metric 2000 stubnet 10.112.0.4/31metric 2000 stubnet 10.112.0.6/31metric 2000 stubnet 10.112.0.12/31metric 10 stubnet 10.112.0.14/31metric 300 stubnet 10.112.0.18/31metric 300 stubnet 10.112.0.22/31metric 65535 external 0.0.0.0/0metric2 10000 external 10.112.0.0/31metric2 10000 external 10.112.0.2/31metric2 10000 external 10.112.0.4/31metric2 10000 external 10.112.0.6/31metric2 10000 external 10.112.0.12/31metric2 10000 external 10.112.0.14/31metric2 10000 external 10.112.0.18/31metric2 10000 external 10.112.0.22/31metric2 10000 external 87.245.238.204/31metric2 10000 external 10.10.8.0/21metric2 10000 external 10.10.97.33/32metric2 10000 router 10.10.97.66 distance 10 router 10.10.97.73metric 300 router 10.10.97.33metric 300 router 10.10.97.69metric 65535 router 10.10.97.67metric 10 stubnet 10.112.0.16/31metric 300 stubnet 10.112.0.18/31metric 300 stubnet 10.112.0.24/31metric 65535 stubnet 10.112.0.28/31metric 10 external 10.112.0.16/31metric2 10000 external 10.112.0.18/31metric2 10000 external 10.112.0.24/31metric2 10000 external 10.112.0.28/31metric2 10000 external 10.10.0.0/21metric2 10000 external 10.10.97.66/32metric2 10000 router 10.10.97.67 distance 0 router 10.10.97.33metric 300 router 10.10.97.66metric 10 router 10.10.97.69metric 65535 stubnet 10.112.0.14/31metric 300 stubnet 10.112.0.28/31metric 10 stubnet 10.112.0.26/31metric 65535 external 10.112.0.14/31metric2 10000 external 10.112.0.26/31metric2 10000 external 10.112.0.28/31metric2 10000 external 10.10.0.0/21metric2 10000 external 10.10.97.67/32metric2 10000 router 10.10.97.68 distance 65835 router 10.10.97.73metric 65535 router 10.10.97.33metric 65535 stubnet 10.112.0.20/31metric 65535 stubnet 10.112.0.22/31metric 65535 external 10.112.0.20/31metric2 10000 external 10.112.0.22/31metric2 10000 external 10.10.97.68/32metric2 10000 router 10.10.97.69 distance 65535 router 10.10.97.66metric 65535 router 10.10.97.67metric 65535 stubnet 10.112.0.24/31metric 65535 stubnet 10.112.0.26/31metric 65535 external 10.112.0.24/31metric2 10000 external 10.112.0.26/31metric2 10000 external 10.10.97.69/32metric2 10000 router 10.10.97.72 distance 2300 router 10.10.97.33metric 2000 router 10.10.97.33metric 2000 router 10.10.97.33metric 2000 router 10.10.97.33metric 2000 router 10.10.97.73metric 2000 router 10.10.97.73metric 2000 stubnet 10.112.0.0/31metric 2000 stubnet 10.112.0.2/31metric 2000 stubnet 10.112.0.4/31metric 2000 stubnet 10.112.0.6/31metric 2000 stubnet 10.112.0.8/31metric 2000 stubnet 10.112.0.10/31metric 2000 external 0.0.0.0/0metric2 10000 external 10.112.0.0/31metric2 10000 external 10.112.0.2/31metric2 10000 external 10.112.0.4/31metric2 10000 external 10.112.0.6/31metric2 10000 external 10.112.0.8/31metric2 10000 external 10.112.0.10/31metric2 10000 external 10.10.97.72/32metric2 10000 external 100.105.99.0/30metric2 10000 router 10.10.97.73 distance 310 router 10.10.97.72metric 2000 router 10.10.97.72metric 2000 router 10.10.97.33metric 10 router 10.10.97.66metric 300 router 10.10.97.68metric 65535 stubnet 10.112.0.8/31metric 2000 stubnet 10.112.0.10/31metric 2000 stubnet 10.112.0.12/31metric 10 stubnet 10.112.0.16/31metric 300 stubnet 10.112.0.20/31metric 65535 external 0.0.0.0/0metric2 10000 external 10.112.0.8/31metric2 10000 external 10.112.0.10/31metric2 10000 external 10.112.0.12/31metric2 10000 external 10.112.0.16/31metric2 10000 external 10.112.0.20/31metric2 10000 external 10.10.8.0/21metric2 10000 external 10.10.97.73/32metric2 10000 external 188.170.160.52/30metric2 10000 --
Regards, Mikhail V. Majorov