Updating export filter for OSPF

[Ondrej Zajicek]

On Mon, Oct 24, 2011 at 04:38:32PM +0200, Ruben Laban wrote:
> On Monday 24 October 2011 at 16:18 (CET), Ondrej Zajicek wrote:
> > Real 'sledgehammer' is restart command. Configure command tries to be
> > gentle, but restart the protocol if necessary (like if BGP import filter
> > is changed and the neighbor does not support route refresh).
> 
> Ok, clear. But aren't route refreshes a fundamental part of BGP? Or am I 
> missing/misunderstanding something here?

No, they are an extension (RFC 2918), but widely implemented.

> What I don't understand though, when I was just altering null-routes and 
> export filters, a configure did result in a hard clear according to my peer. 
> Are there any other scenarios where configure could lead to a hard clear and 
> not a soft clear? One thing that comes to mind is that I enabled 'next hop 
> self' as well, though I don't see why that'd warrant a hard clear either?

Proper reconfiguration of BGP sessions is not implemented in BIRD, so changing
other parameters (than import/export) of BGP (like 'next hop self') will
lead to session restart.

-- 
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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