From: amernas (taloust@gmail.com)
Date: Sun Oct 26 2008 - 18:34:05 ARST
normally the subnet mask should match in order to form adj. but in
point-to-point mode, ospf ignores this check.
Fahad Khan wrote:
> Dear All,
>
> Have a look to the scenario,
>
>
> R1(s1/0-10.0.0.1/*16*)------------------(10.0.0.2/*8*-s1/0)R2
>
> *OSPF adj forms* in case if i set the network type "point-to-point" on both
> serial interfaces
>
> But if I set network type as "Broadcast", *adj is not formed*
>
> and the "debug ip ospf adj+events+packets" looks like (on R1);
>
> *Mar 1 00:08:58.783: OSPF: Send with youngest Key 0
> *Mar 1 00:08:58.783: OSPF: Send hello to 224.0.0.5 area 0 on Serial1/0 from
> 10.
> 0.0.1
> *Mar 1 00:09:06.431: OSPF: rcv. v:2 t:1 l:44 rid:2.2.2.2
> aid:0.0.0.0 chk:0 aut:2 keyid:0 seq:0x3C7EC691 from Serial1/0
> *Mar 1 00:09:06.435: OSPF: Rcv hello from 2.2.2.2 area 0 from Serial1/0
> 10.0.0.
> 2
> *Mar 1 00:09:06.439: OSPF: Mismatched hello parameters from 10.0.0.2
> *Mar 1 00:09:06.443: OSPF: Dead R 40 C 40, Hello R 10 C 10 Mask R
> 255.0.0.0 C
> 255.255.0.0
>
> Can any body shed light on the reason behind all this?
> Thanks in advance
>
> best regards,
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