From: Godswill Oletu (oletu@inbox.lv)
Date: Mon Jun 14 2004 - 14:25:37 GMT-3
OSPF uses multicast address 224.0.0.5 and 224.0.0.6 to form adjacency and
send their hello packets.
Why not try to apply these access-list to the interfaces between both
routers.
R(config)#Access-list 1 permit 224.0.0.5 0.0.0.0
R(config)#Access-list 1 permit 224.0.0.6 0.0.0.0
R(config)#Access-list 1 deny 224.0.0.0 0.255.255.255
R(config)#Access-list 1 permit any any
The above access-list should work, however note that:
All routers uses : 224.0.0.1
EIGRP uses 224.0.0.10
RIPv2 uses 224.0.0.9
So, you may have to adjust your access-list to accommodate other routing
protocols running in your environment.
my 0.02 cents
----- Original Message -----
From: "Dan" <dans@danbsd.a.la>
To: "Karim" <karim_ccie@hotmail.com>
Cc: <ccielab@groupstudy.com>
Sent: Monday, June 14, 2004 2:38 AM
Subject: Re: OSPF over broadcast - drop mulitcast.
> Maybe using tunnel interface between the two?
>
>
> Karim wrote:
>
> >Hi all,
> >
> >Need your help in the following problem:
> >
> >Having two routers on the same ethernet segment, asked to drop multicast
> >traffic betwen the two routers. Meanwhile make sure that adjacecny will
still
> >established between the two routers.
> >
> >I was thinking about a passive interface on both routers but passive
interface
> >will drop the adjacency. So would it be solved with passive plus neighbor
> >command on both routers ?? Any ideas ??? am I thinking in the right
direction
> >??
> >
> >Thanks in advance,
> >Karim.
> >
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