OT - Quagga/CARP

Bart Van Kerckhove bart at it-ss.be
Thu Mar 16 21:36:30 UTC 2006

Bruce M Simpson <bms at spc.org> wrote:
> On Thu, Mar 16, 2006 at 07:35:20PM +0100, Bart Van Kerckhove wrote:
>> Is this by design, or just lack of time/interest?
>> If anyone feels up to the task of  fixing/implementing what's needed
>> to make this work, we'd be happy to sponsor its development.
> This is a collision between the connected route implicitly created
> by configuring an interface which has the same prefix length as
> an existing route in the FreeBSD FIB.
> This is a known issue and is by design.
> Most BSD-derived implementations have this limitation. It needs to be
> resolved in preparation for equal-cost multipath.
ECMP was indeed one of the features i was looking for at that time, which i 
found to be impossible.
I just don't like the idea of moving towards another platform just for this 
reason, since I'm very happy with freebsd's performance.
There used to be a patch for ECMP, but it was a huge hack. very dirty at 

> Sadly whilst I'd be more than happy to work on this (with or without
> funding), I don't have the free time to do so, but I may be able to
> eke out spare time to look at patches.
Any quick hacks you have in mind that could allow multiple copies of the 
same route / pfxlen in the freebsd routingtable?
Doesn't even need to have metrics in kernel-level, the point of the whole 
thing (for now) would be to be able to insert an additional route with the 
same prefix, and delete the previousy set route *afterwards*. Which is what 
ospfd/zebra would do.
Any insights / hacks / other dirty things are very appreciated.
For all others following this thread: "we'd be happy to sponsor its 
development" still is in effect ;)

Met vriendelijke groet / With kind regards,

Bart Van Kerckhove
bart at it-ss.be
http://www.it-ss.be - "Solid Solutions for your IT needs"
"There are 10 kinds of ppl; those who read binary and those who don't" 
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