[145019] in North American Network Operators' Group
Re: Strange static route
daemon@ATHENA.MIT.EDU (Joel Maslak)
Sun Sep 25 09:11:01 2011
From: Joel Maslak <jmaslak@antelope.net>
In-Reply-To: <CAFDgZgXHMBwA3rfkEauvRs60QaNPWqyr5m46yBkZB7nJ6VS7yQ@mail.gmail.com>
Date: Sun, 25 Sep 2011 07:10:47 -0600
To: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Sep 25, 2011, at 3:37 AM, Tom Storey <tom@snnap.net> wrote:
> I found I had to do this many years ago on some Cisco routers to get them t=
o
> load balance (per packet) across two links. Adding 0.0.0.0/0 routes across=
> both links just resulted in traffic routing across one link. Broke it into=
> two /1's per link and it worked perfectly.
Two other reasons for this too:
1) Something won't redistribute 0.0.0.0/0 on the network. Either because th=
e person doesn't know the command to tell the router to do it, or because th=
e router simply won't redistribute a default route.
2) Could also be failover. One router might be advertising 0.0.0.0/0 on one=
end of the network. A different router on a different part of the network m=
ight be advertising the two /1's. The /1's would be used unless they became=
unreachable.=
