Re: OSPF Passive-Interface Question

looking at the router i would say you do not need to worry too much about
multicast with that change:

R2(config-if)#do sh debug
Generic IP:
  IP packet debugging is on (detailed)
R2(config-if)#do sh ip ospf int f0/0 | i Network
  Process ID 1, Router ID 1.1.1.2, Network Type BROADCAST, Cost: 10
R2(config-if)#
*Mar 1 00:09:52.955: IP: s=1.1.1.2 (local), d=224.0.0.5 (FastEthernet0/0),
len 76, sending broad/multicast, proto=89

R2(config-if)# ip ospf network point-to-multipoint non-broadcast

R2(config-if)#do sh ip ospf int f0/0 | i Network
  Process ID 1, Router ID 1.1.1.2, Network Type POINT_TO_MULTIPOINT, Cost:
10

R2(config)#router ospf 1
R2(config-router)#neighbor 1.1.1.1

R2(config-router)#
*Mar 1 00:12:17.215: IP: s=1.1.1.2 (local), d=1.1.1.1 (FastEthernet0/0),
len 76, sending, proto=89
*Mar 1 00:12:17.303: IP: s=1.1.1.1 (FastEthernet0/0), d=1.1.1.2, len 80,
rcvd 0, proto=89
*Mar 1 00:12:17.307: IP: s=1.1.1.2 (local), d=1.1.1.1 (FastEthernet0/0),
len 64, sending, proto=89
*Mar 1 00:12:17.311: IP: s=1.1.1.2 (local), d=1.1.1.1 (FastEthernet0/0),
len 80, sending, proto=89
*Mar 1 00:12:17.315: IP: s=1.1.1.1 (FastEthernet0/0), d=1.1.1.2, len 64,
rcvd 0, proto=89
*Mar 1 00:12:17.315: IP: s=1.1.1.1 (FastEthernet0/0), d=1.1.1.2, len 104,
rcvd 0, proto=89
*Mar 1 00:12:17.315: IP: s=1.1.1.1 (FastEthernet0/0), d=1.1.1.2, len 80,
rcvd 0, proto=89
*Mar 1 00:12:17.315: IP: s=1.1.1.2 (local), d=1.1.1.1 (FastEthernet0/0),
len 104, sending, proto=89
*Mar 1 00:12:17.395: IP: s=1.1.1.1 (FastEthernet0/0), d=1.1.1.2, len 64,
rcvd 0, proto=89
*Mar 1 00:12:17.423: IP: s=1.1.1.2 (local), d=1.1.1.1 (FastEthernet0/0),
len 64, sending, proto=89
*Mar 1 00:12:17.423: IP: s=1.1.1.2 (local), d=1.1.1.1 (FastEthernet0/0),
len 56, sending, proto=89
*Mar 1 00:12:17.471: IP: s=1.1.1.1 (FastEthernet0/0), d=1.1.1.2, len 56,
rcvd 0, proto=89
*Mar 1 00:12:17.471: IP: s=1.1.1.1 (FastEthernet0/0), d=1.1.1.2, len 64,
rcvd 0, proto=89
*Mar 1 00:12:17.471: IP: s=1.1.1.2 (local), d=1.1.1.1 (FastEthernet0/0),
len 84, sending, proto=89
*Mar 1 00:12:17.475: IP: s=1.1.1.1 (FastEthernet0/0), d=1.1.1.2, len 84,
rcvd 0, proto=89
*Mar 1 00:12:17.479: %OSPF-5-ADJCHG: Process 1, Nbr 1.1.1.1 on
FastEthernet0/0 from LOADING to FULL, Loading Done

 --
Garry L. Baker

"With sufficient thrust, pigs fly just fine..." - RFC 1925

On Tue, May 31, 2011 at 4:10 AM, Andrew LaPorte <andy_at_cloud9.net> wrote:

> Hi Guys,
>
>
>
> I had a question about OSPF and passive-interface that I'm hoping someone
> can help further explain to me.
>
>
>
> Is safe to assume that if you put an interface under "ip ospf network
> point-to-multipoint non-broadcast" that you can remove passive interface on
> that interface without worrying about it responding to a multicast hello or
> sending one?
>
>
>
> Andy
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Tue May 31 2011 - 05:06:04 ART