forwarding when two rip defaults

Randy Bush randy at psg.com
Thu Sep 10 16:07:18 UTC 2009


>>>> say i run routed and receive rip default from two routers, on the same
>>>> local ether.  what is the forwarding?  i presume it's not smart enough
>>>> to balance flows.  i hope not alternating packets.  clue, please?
>>> Unless you have RADIX_MPATH in your kernel (with a recent FreeBSD, ie:
>>> 8.0) it'll choose one at random
>> aha!  that was the clue.  docs are a bit thin, still looking.  but thank
>> you.
> I don't want to disrupt the party but I seriously doubt that routed
> supports multipath routing. Routed's radix code is unable to handle
> multipath routes.

maybe i am confused.  but my momma told me that routing != forwarding.

i.e. routed will receive two default routes and i hope would install
them in the fib, where RADIX_MPATH forwarding would take over.  am i
wrong about what routed will do?  will it choose only one to install in
the fib?

randy


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