Re: why multi-hop icmp redirects to 0.0.0.0 on 13.0 ?
Date: Sat, 04 Dec 2021 16:22:47 UTC
Hi! > > 10:20:16.889185 IP x.x.x..1 > y.y.y.1: ICMP redirect z.z.z.z to host 0.0.0.0, length 48 > > whoops. > > This has been stopped by net.inet.ip.redirect=0 on rtr1, but my question is: > > > > Why is rtr1 sending those multi-hop icmp redirects at all ? > > Could you elaborate on: > (a) Do rtr1 or rtr2 have a default route or are they carrying a full DFZ > without default route? rtr1 runs frr, has full route, either with or without default route. rtr2 has only static routes, default points to rtr1. > Assumption: if both rtr2 and rtr1 are running 13 and not 12, rtr2 > does have a default route and rtr1 has a full DFZ only and no > default route? Seeo above. > (b) At the time this happens does rtr1 have a route to z.z.z.z ? > route -4 get z.z.z.z Yes. -- pi@FreeBSD.org +49 171 3101372 Now what ?