From: Chris Home (clarson52@comcast.net)
Date: Thu Jan 16 2003 - 01:33:13 GMT-3
Along the lines of tools for redistribution and filtering....
For building my filters, I do a sh ip route "protocol" (for example: sh ip
route rip) so I can see only the routes requiring redistribution and build
my route-map or filter off the output.. Then I do the other protocols
requiring redistribution the same way. For me, it simplifies finding the
necessaties over having to look at the whole table. I do the same in
multiple points of redistribution by looking at the first redistribution
point and using the output to put route-maps on the other points of
redistribution.
----- Original Message -----
From: "Cary Anderson" <caryande@cisco.com>
To: "Jennifer Bellucci" <Jennifer_bellucci@hotmail.com>
Cc: <ccielab@groupstudy.com>
Sent: Wednesday, January 15, 2003 8:08 PM
Subject: RE: Mutual redistribution
> The tool I like best is to turn on "debug ip routing" on your router to
see
> the routing loops. You can then do things like increase distance, filter,
> etc to fix them quickly. I personally rarely filter on redistribution, as
> it slows you down a lot. You can usually tell by looking at the topology
if
> you need to filer or not.
>
> My 2 cents
>
> -----Original Message-----
> From: Jennifer Bellucci [mailto:Jennifer_bellucci@hotmail.com]
> Sent: Wednesday, January 15, 2003 3:11 PM
> To: Vijay S Jayaraman; ccielab@groupstudy.com
> Subject: Re: Mutual redistribution
>
>
> Hi
>
> Everyone has their own way of doing things. The most reliable method I
have
> found for myself is to permit only the routes you want and don't let
> anything be red un-controlled. That way, your ACL are nice and solid with
> little time spent on exactly what you need to filter if any.
>
> Try performing red and speed up the protocol lifetime - hello, keep, spf,
> lsa, stuff like that. See what happens and you can see routing loops
better
> while using traceroute to do a nice check, you will find that sometimes
you
> can ping the address but the tracroute goes on till 32 or something.
>
> Just a thought.
>
> Jbell
> ----- Original Message -----
> From: "Vijay S Jayaraman" <vjayaram@in.ibm.com>
> To: <ccielab@groupstudy.com>
> Sent: Wednesday, January 15, 2003 9:33 AM
> Subject: Mutual redistribution
>
>
> > Hi,
> > In case I am doing a mutual redistribution at a single point between
> > any two routing protocols , do I really ever need to filter the routes
> > that
> are
> > being redistributed for prevention of a loop.....????????
> >
> > I have never done this and have had no problems till now..... But
> > wouldnt want to discover something new during my lab.....
> >
> > But is there any case where filtering is required in for such a
> > redistribution?....what is the normal thing to do??
> >
> >
> > Regards,
> > Vijay.
> > .
> .
.
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