ospf netmask mismatch

Ondrej Zajicek santiago at crfreenet.org
Mon Jul 12 19:09:38 CEST 2010

On Mon, Jul 12, 2010 at 05:49:21PM +0200, Martin Kraus wrote:
> On Mon, Jul 12, 2010 at 03:53:31PM +0200, Ondrej Zajicek wrote:
> > On Mon, Jul 12, 2010 at 01:39:25PM +0200, Martin Kraus wrote:
> > The private /25 prefixes uses private IP addresses? There was a change in BIRD
> > that interface with more IP addresses works like more virtual interfaces with
> > regard to OSPF, but it should not cause problems and it was earlier change
> > (~ 1.2.0).
> I have 1.1.4 in most of the network.
> > 
> > It is strange that reported netmask is /31, but you said that it uses
> > . Could you send me output of 'show ospf interface'?
> When I get rid of the private prefixes it all works fine. when I add them it
> gets  the netmask mismatch ( again. the /25 is set on the private
> prefixes.

Strange, could you also get a tcpdump (vith -vv or -w options) of that hello packets?

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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