From: Evgeny Tantsura (ivgen@castel.nl)
Date: Tue Dec 10 2002 - 16:38:27 GMT-3
> For RIP, although you configure neighbor command, RIP updates still sent to multicast address 224.0.0.9.
> You need to define an access-list to prevent this
From:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_c/ipcprt2/1cdrip.htm#xtocid4
Allowing Unicast Updates for RIP
Because RIP is normally a broadcast protocol, in order for RIP routing
updates to reach nonbroadcast networks, you must configure the Cisco IOS
software to permit this exchange of routing information. To do so, use the
following command in router configuration mode:
Command Purpose
Router(config-router)#neighbor ip-address
Defines a neighboring router with which to exchange routing information.
To control the set of interfaces with which you want to exchange routing
updates, you can disable the sending of routing updates on specified
interfaces by configuring the passive-interface command. See the
discussion on filtering in the "Filter Routing Information" section in the
>
-----Original
Message----- > From: Ram Shummoogum [mailto:rshummoo@ca.ibm.com]
> Sent: Tue 12/10/2002 8:21 AM
> To: eward15@juno.com
> Cc: ccielab@groupstudy.com
> Subject: Re:eigrp neighbor command
>
>
>
> This is true for RIP but I am not sure about EIGRP. I know for a fact that
> in EIGRP the passive-interface will prevent the formation of neighbors.
>
> Rgds,
> RAM
>
>
>
> eward15@juno.com@groupstudy.com on 12/09/2002 07:52:52 PM
>
> Please respond to eward15@juno.com
>
> Sent by: nobody@groupstudy.com
>
>
> To: ccielab@groupstudy.com
> cc:
> Subject: Re:eigrp neighbor command
>
>
> I believe the neighbor command is used to send routing annoucements as
> unicast packets instead of multicast or broadcast cast packets. For
> instance, there may be 5 routers on a segment but only two of them are
> using the same routing protocol. Instead of needlessly sending updates to
> the other routers, you could use a passive-interface to block the
> broadcasts/multicasts on the interface and instead send a directed unicast.
> Someone please correct me if I am wrong.
>
> Eugene Ward
>
>
>
>
> ________________________________________________________________
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With kind regards/ met vriendelijke groeten,
------------------------------------------------
E. Tantsura
Network Developer
Essent Kabelcom N.V.
Dr.van Deenweg 84
8025BN Zwolle, The Netherlands
Tel: +31-(0)38-850-7642
Fax: +31-(0)38-850-7410
Mob: +31-(0)6-290-80458
------------------------------------------------
.
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