Date: Tue, 18 May 1999 22:00:50 -0600 From: Wes Peters <wes@softweyr.com> To: Jonathan Hanna <pangolin@home.com> Cc: freebsd-net@FreeBSD.ORG Subject: Re: Redirects and expire times Message-ID: <37423772.2B5BEF98@softweyr.com> References: <19990518221829.CSIZ24551.mail.rdc1.bc.home.com@cr1003333-a.crdva1.bc.wave.home.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Jonathan Hanna wrote:
>
> What is the proper way of handling ICMP redirects? I expected
> host routes to be added with an expire time, but apparently
> they are permanent.
>
> I found one old reference to this, but no reply.
>
> > Date: Mon, 11 Mar 1996 15:09:15 -0600 (CST)
> > From: Scott Mace <smace@metal.neosoft.com>
> > To: hackers@freebsd.org
> > Subject: Redirects and expire times...
> > Message-ID: <199603112109.PAA15480@metal.ops.neosoft.com>
> >
> > I think it is a bug to add a host route after receiving a ICMP redirect
> > and NOT having any expire set on the route. If you have a default routed
> > host in a complex topology you can get into trouble when the topology changes.
I agree. At Xylan, we had numerous customer complaints about redirects
filling the routing table and the only way to clear them (4.2 BSD based
stack) was to reboot the switch. We added a 10-minute timeout on all
redirect routes, figuring that redirects SHOULD be the exception rather
than the rule. YMMV. We've had no customer complaints since then. ;^)
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
http://www.softweyr.com/~softweyr wes@softweyr.com
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?37423772.2B5BEF98>