unnecessary and frequency kernel routing update

Ondrej Zajicek santiago at crfreenet.org
Sun Apr 28 21:17:54 CEST 2013

On Fri, Apr 26, 2013 at 05:12:47PM +0400, Slawa Olhovchenkov wrote:
> bird router got from BGP peer update don't change routing table:
> and send unneeded routing update to kernel (old route is same):
> >From this BGP peer similar updates got very frequence (50 per second and higher).
> How to prevent unneeded routing update to kernel?


If the received route update is exactly the same, then it should
be ignored and not propagated further, but there is probably some
minor change (like in BGP attributes) that forces the propagation.
BIRD currently does not support anything that could prevent propagation
of frequent updates.

For the kernel protocol it could be hacked by removing the code that
handles route updates and depending just on periodic routing table scans
for BIRD-kernel routing table synchronization.

Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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