Hello Ondrej, I wonder if anything more happened with this problem? As far as I can tell, the issue persist with BIRD 1.4.5, no triggered updates with metric 16 is transmitted when a route is removed. Also, the "rip" branch fails to compile for me now. Tore * Tore Anderson
* Ondrej Filip
unfortunately, the current RIP code is broken. I tried to fix this in git branch rip, but hasn't been merged into master yes. But if you have some capacity to test this branch, it would be very helpful.
Hi Ondrej,
I'll be happy to help out testing this branch. Here's my initial observations:
1) Routes that are removed from the routing table do get advertised with metric infinity (16), and this update gets retransmitted five times. Great!
2) RIP seems to only be sending updates only at regular tick intervals (every 30 seconds). This means that there is a delay after adding/removing an address of up to 30 seconds before the neighbours get informed of the change. BIRD 1.4.0 fares better (for additions).
FWIW, here are the timestaps of when I added/removed addresses and when BIRD passed that information along. I confirmed that the additions/removals showed up in "birdc[6] show route" pretty much instantly, so it's the RIP protocol that's laggy:
09:45:11 - ip address add 192.0.2.1/32 09:45:22 (+11s) - RIP announcement going out
09:46:23 - ip address add 2001:db8::1/128 09:46:51 (+28s) - RIP announcement going out
09:47:45 - ip address del 192.0.2.1/32 09:47:53 (+8s) - RIP announcement going out
09:48:24 - ip address del 2001:db8::1/128 09:48:51 (+27s) - RIP announcement going out
3) RIPng appears to be advertising some bogus routes (but only when it's also advertising a sane route), as seen here:
09:47:21.635383 IP6 fe80::225:b5ff:fe00:ce.ripng > ff02::9.ripng: ripng-resp 3: ffff:3:2c:114:9912:753::/0 2001:db8::1/128 (1) ffff:1:c917:28a0:b99c:3132:fd5d:283b/96 [48667] (166) 09:47:51.906476 IP6 fe80::225:b5ff:fe00:ce.ripng > ff02::9.ripng: ripng-resp 3: ffff:3:2c:114:b812:753::/0 2001:db8::1/128 (1) ffff:1:917e:57b1:6814:f716:c44b:a652/187 [57261] (210)
The PCAP and config files are attached.
Tore