icmp v4 redirect timeout

[Andrey V. Elsukov]

On 22.10.2019 17:30, Victor Gamov wrote:
> Hi All
> 
> I discover the following problem: FreeBSD host install route recived by
> ICMP-redirect from default GW and this route is permanents.
> 
> 
> In my case FreeBSD 192.168.1.10/24 has 192.168.1.254 as default gateway.
> This network has interconnection with remote network 192.168.88.0/24 via
> some other gateways -- 192.168.1.199 + 192.168.1.195 for example.  All
> gateways  using OSPF to exchange routing info.
> 
> 192.168.1.10 send packet destined to remote network (192.168.88.0/24) to
> default gateway 192.168.1.254, receive ICMP-redirect and install route
> to 192.168.88.0/24 via 192.168.1.199.  Then 192.168.1.199 off for some
> reason but 192.168.1.10 never know about it because route installed via
> 192.168.1.199 is permanent.
> 
> I see net.inet6.icmp6.redirtimeout in my FreeBSD 11.2-STABLE #0 r339734
> and I think this sysctl set timeout for routes installed via
> ICMP-redirects (route deletes after this timeout?).
> 
> Is it possible to get such sysctl for ipv4 ?

I think expiring doesn't work for IPv6 too. At least, I didn't find
related code from a quick look.

-- 
WBR, Andrey V. Elsukov

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