RE: Routing Loop Detection & Fix

From: keith tokash (ktokash@hotmail.com)
Date: Mon Dec 24 2007 - 03:42:27 ART


I'm currently bashing my way through an IE lab with multiple points of mutual
redistribution. I like to tag routes before redistributing them so I can see
where they end up. Oftentimes it's not where I thought they would. Fixing
the loop of course requires figuring out *exactly* why the route is showing up
in seemingly odd places.

With a few exceptions, secrecy is deeply incompatible with democracy and with
science.
        --Carl Sagan

> From: mgreenlee@ipexpert.com
> To: cciefun@gmail.com; ccielab@groupstudy.com
> Subject: RE: Routing Loop Detection & Fix
> Date: Mon, 24 Dec 2007 01:20:56 -0500
>
> Shows and debugs won't "fix" a problem, although they can be used to
> diagnose a problem. In general, blindly turning on debugs in a production
> network is not recommended. For testing, debug ip routing is one of the
> most useful ways to see just how stable your routing tables are.
>
>
> Debug ip routing (if topology is stable, shouldn't be much activity)
> Debug ip mrouting
> Debug ipv6 routing
>
> Show ip route
> Show ipv6 route
> Show ip mroute
>
> Marvin Greenlee, CCIE #12237 (R&S, SP, Sec)
> Senior Technical Instructor - IPexpert, Inc.
> A Cisco Learning Partner - We Accept Learning Credits!
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>
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie
> ccie
> Sent: Monday, December 24, 2007 1:11 AM
> To: Cisco certification
> Subject: Routing Loop Detection & Fix
>
> Hi Expert,
>
> How to detect the routing loop, with respect to below protocol. List of
show
> & debug command to fix this kind problem will be graet help.
>
> IPv6
> PIM
> BGP
> OSPF
> EIGRP
> RIP
> IS-IS
>
> Regards,
> Mike
>
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