RE: Preventing an EIGRP/OSPF Neighbor Forming

From: Mike Ollington (Mike.Ollington@uk.didata.com)
Date: Wed Nov 30 2005 - 13:01:50 GMT-3


I also want to prevent adverts out and distribute-list gateway doesn't
appear to work outbound for EIGRP.

  _____

From: Chula Bandara [mailto:chula_bandara@hotmail.com]
Sent: 30 November 2005 15:59
To: Mike Ollington; pborghese@groupstudy.com
Cc: ccielab@groupstudy.com
Subject: RE: Preventing an EIGRP/OSPF Neighbor Forming

is prefix-list allowed , you can you use

distribute-list gateway prefix-list-name in for eigrp

  _____

        From: "Mike Ollington" <Mike.Ollington@uk.didata.com>
        Reply-To: "Mike Ollington" <Mike.Ollington@uk.didata.com>
        To: "Paul Borghese" <pborghese@groupstudy.com>
        CC: <ccielab@groupstudy.com>
        Subject: RE: Preventing an EIGRP/OSPF Neighbor Forming
        Date: Wed, 30 Nov 2005 15:19:14 -0000
        Paul,

        Changing those values would break all neighbours on an
interface,
        anything to kill just the one?

        For example:

        172.16.1.1
        172.16.1.2
        172.16.1.3 <- I temporarily want to prevent this neighbour.
        172.16.1.4

        Thanks,
        Mike

        -----Original Message-----
        From: Paul Borghese [mailto:pborghese@groupstudy.com]
        Sent: 30 November 2005 15:10
        To: Mike Ollington
        Cc: ccielab@groupstudy.com
        Subject: Re: Preventing an EIGRP/OSPF Neighbor Forming

        In OSPF a neighbor relationship will not be formed if any of the
        following
        mismatch:

        hello/dead interval
        area id
        stub flag
        authentication
        subnet mask
        mtu

        So for example, if you change the hello interval on one side,
the
        neighbor
        will not form. You can see this by doing a "debug ip ospf adj".

        For EIGRP, you can try changing the K values or Autonomous
System
        number.
        EIGRP will for a relationship even if the hello values do not
match.

        Take care,

        Paul Borghese

> Hello,
>
>
>
> Hypothetical - you have an interface with many EIGRP/OSPF
neighbours.
> You want to prevent one; you don't want to use an interface
access
        list.
>
>
>
> In BGP there is the neighbour shutdown command, PIM has a
neighbour
> list. Any thing similar for OSPF or EIGRP?
>
>
>
> Thanks,
>
> Mike
>

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