ospf interoperability problems with cisco and other errors

Csaba Szép csszep at gmail.com
Sat Oct 3 22:26:34 CEST 2009

One more info from cisco (without alias adressess and no other neighbor):

Router#sh ip ospf database

            OSPF Router with ID ( (Process ID 1)

                Router Link States (Area

Link ID         ADV Router      Age         Seq#       Checksum Link count         1141        0x8000001F 0x003CE2 1         951         0x80000011 0x00A96B 1

                Net Link States (Area

Link ID         ADV Router      Age         Seq#       Checksum         951         0x80000007 0x00A185

                Type-5 AS External Link States

Link ID         ADV Router      Age         Seq#       Checksum Tag         691         0x80000009 0x000A9C 1         1145        0x80000001 0x000DCA 0

2009/10/3 Ondrej Zajicek <santiago at crfreenet.org>:
> On Sat, Oct 03, 2009 at 07:39:55PM +0200, Csaba Szép wrote:
>> Hi All!
> Hello
>> First, the HELLO packet ignored with "Bad OSPF hello packet from
>> received: options mismatch (0x12)." if i use the cisco default
>> ospf configuration.
>> With "ip ospf lls disable" option everything is ok.
> This is probably inappropriate options handling in BIRD, we will fix
> it.
>> Second, i advertise some alias IP from the pc to the cisco router, but
>> if i remove the alias address from the interface some OSPF routes
>> still present in the cisco router.
> So i suppose the problem is just the route ?
> I am not sure where it comes from. Could you send me output of command
> 'show interfaces' and  'show ospf state' on BIRD?
> --
> Elen sila lumenn' omentielvo
> Ondrej 'SanTiago' Zajicek (email: santiago at crfreenet.org)
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> "To err is human -- to blame it on a computer is even more so."
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