From: Volkov, Dmitry (Toronto - BCE) (dmitry_volkov@xxxxxxxxx)
Date: Wed Jul 31 2002 - 15:12:56 GMT-3
On non-broadcast media such as Frame Relay, X.25, ATM, and Switched
Multimegabit Data Service (SMDS), OSPF can run in two modes:
1) Mode NBMA: simulates a broadcast model by electing a designated router
(DR) and a backup designated router (BDR). There are two ways to simulate a
broadcast model on an NBMA network:
1.1 define the network type as broadcast with the ip ospf network
broadcast interface sub-command or
1.2 configure the neighbor statements using the router ospf command.
2) Mode: Point-to-mutipoint: treats non-broadcast network as a collection of
point-to-point links.
You must define the network type on non-broadcast networks to avoid
configuring neighbor statements. Below are sample configurations for OSPF
over non-broadcast links. Use the show ip ospf <interface> command to check
the network type of an interface running OSPF.
http://www.cisco.com/warp/public/104/18.html
Dmitry
-----Original Message-----
From: Song Mu [mailto:songmu@yahoo.com]
Sent: Wednesday, July 31, 2002 12:49 PM
To: chenyan; ccielab
Subject: Re: maybe a bug
Maybe not a bug:
On the remote sides turn off the split horizon give a try.
Thanks,
Song
--- chenyan <chenyan@deeptht.com.cn> wrote:
> hi,guys,
>
> I mentioned previously that the adj is not available between the hub
> with multipoint subinterface and spokes with phycial interface
> without any ip ospf network statements, but after the ip ospf network
> point-to-multipoint statement on the hub it can work. After deleting
> the statement it can still works with DR/BDR specified, but after
> reseting the routers the adj can not work.
>
> Thanks
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