As a followup to this thread, I don’t know why I didn’t try this to start with, but installing 2.0.4 on the router having problems cleared it up with no change to configuration. I did try to upgrade to 2.0.5 and the problem returned. Now that I know for sure that this is a problem in BIRD (either with a regression or some change that is required by spec but not clear how to configure for), I will try to diff the sources and see what might have caused this. Regards, Brian
On Feb 19, 2020, at 3:43 PM, Brian Topping <brian.topping@gmail.com> wrote:
If it helps, I uploaded the output from `debug backbone all` && `restart backbone` to https://gist.github.com/briantopping/7313d6bda963ea01b6d1288fda4942e8
On Feb 17, 2020, at 12:17 AM, Brian Topping <brian.topping@gmail.com> wrote:
Greetings, I have a network with four routers on an OSPF backbone. Only one of the four routers cannot export the type 5 LSA entries to the kernel. I cannot figure out why. I wonder if I might kindly ask some guidance.
The routers (including the problem router) are all BIRD 2.0.7 with the router with IP 10.10.4.1 running 2.0.4. The kernels are Linux 4.20.x.
Here is the OSPF for a working router:
protocol ospf backbone { ipv4 { export all; import filter { if net = 0.0.0.0/0 then reject; else accept; }; }; area 0.0.0.0 { interface "eno2" {}; interface "vti*" { type nbma; strict nonbroadcast yes; neighbors { 10.9.254.2 eligible; }; }; }; }
The OSPF configuration of the router having problems. They are virtually identical with the exception of the interfaces:
protocol ospf backbone { ipv4 { export all; import filter { if net = 0.0.0.0/0 then reject; else accept; }; }; area 0.0.0.0 { interface "bond0" { }; interface "vti*" { type nbma; neighbors { 10.9.255.1 eligible; 10.9.254.1 eligible; }; }; }; }
All the routers have *identical* LSADBs on each router (not shown). master4 is correct on the working routers:
[root@gw02 ~]# birdc show route BIRD 2.0.7 ready. Table master4: 0.0.0.0/0 unicast [bgp_handy_125 02:07:43.248] * (100) [AS30475i] via c.d.143.125 on eno1 unicast [bgp_handy_126 02:07:43.661] (100) [AS30475i] via c.d.143.126 on eno1 a.b.96.0/32 unicast [backbone 02:07:46.207] E2 (150/10/10000) [c.d.143.113] via 10.10.0.41 on eno2 a.b.96.9/32 unicast [backbone 02:07:46.207] E2 (150/10/10000) [c.d.143.113] via 10.10.0.41 on eno2 a.b.96.8/32 unicast [backbone 02:07:46.207] E2 (150/10/10000) [c.d.143.113] via 10.10.0.41 on eno2 a.b.96.11/32 unicast [backbone 02:07:46.207] E2 (150/10/10000) [c.d.143.113] via 10.10.0.41 on eno2 10.10.0.0/22 unicast [backbone 02:07:46.207] I (150/10) [c.d.143.113] dev eno2 10.9.254.2/32 unicast [backbone 02:08:16.208] I (150/10) [10.10.4.21] via 10.9.254.2 on vti3 10.9.254.0/24 unicast [backbone 02:08:16.208] I (150/10) [10.10.4.21] dev vti3 10.9.255.2/32 unicast [backbone 02:08:16.208] I (150/10) [10.10.4.21] via 10.9.254.2 on vti3 192.168.10.0/24 unicast [backbone 02:08:16.208] I (150/30) [10.10.4.1] via 10.9.254.2 on vti3 10.10.4.0/22 unicast [backbone 02:08:16.208] I (150/20) [10.10.4.1] via 10.9.254.2 on vti3 10.9.255.0/24 unicast [backbone 02:08:16.208] I (150/20) [c.d.143.113] via 10.9.254.2 on vti3 weight 1 via 10.10.0.41 on eno2 weight 1 a.b.97.1/32 unicast [backbone 02:07:46.207] E2 (150/10/10000) [c.d.143.113] via 10.10.0.41 on eno2 a.b.96.10/32 unicast [backbone 02:07:46.207] E2 (150/10/10000) [c.d.143.113] via 10.10.0.41 on eno2 a.b.96.0/24 blackhole [public_nets_proto 02:07:35.107] * (500) unicast [backbone 02:07:46.207] E2 (150/10/10000) [c.d.143.113] via 10.10.0.41 on eno2 a.b.97.0/24 blackhole [public_nets_proto 02:07:35.107] * (500) unicast [backbone 02:07:46.207] E2 (150/10/10000) [c.d.143.113] via 10.10.0.41 on eno2 [root@gw02 ~]# birdc show route a.b.96.0/32 all BIRD 2.0.7 ready. Table master4: a.b.96.0/32 unicast [backbone 02:07:46.207] E2 (150/10/10000) [c.d.143.113] via 10.10.0.41 on eno2 Type: OSPF-E2 univ OSPF.metric1: 10 OSPF.metric2: 10000 OSPF.tag: 0x00000000 OSPF.router_id: c.d.143.113
The router with problems does *not* have a correct copy of master4 table, it is missing all of the LSA type 5 entries. So of course they cannot be exported to kernel on that router:
[root@centos01 ~]# birdc show route BIRD 2.0.7 ready. Table master4: 10.9.254.2/32 unicast [backbone 22:53:52.605] I (150/0) [10.10.4.21] dev bond0 10.9.254.0/24 unicast [backbone 00:08:15.604] I (150/10) [10.10.4.21] dev bond0 10.9.255.2/32 unicast [backbone 23:56:54.605] I (150/0) [10.10.4.21] dev bond0 192.168.10.0/24 unicast [backbone 22:54:32.604] I (150/20) [10.10.4.1] via 10.10.4.1 on bond0 10.10.4.0/22 unicast [backbone 22:54:32.604] I (150/10) [10.10.4.1] dev bond0 10.9.255.0/24 unicast [backbone 23:57:39.604] I (150/10) [c.d.143.113] dev bond0
What I cannot figure out is why the OSPF entries are not imported to master4 on this single machine.
Thanks kindly for any thoughts.
Brian