Re: Redistribution

From: Bob Sinclair (bobsinclair@frontiernet.net)
Date: Wed Jun 28 2006 - 19:04:38 ART


Hi Josh,

On your recommendation, I added the Cisco Press Optimal Routing book to my
Safari bookshelf. I have a question however:

Figure 2-23 shows mutual redistribution at two points between OSPF and EIGRP.
Below that figure the authors walk through a numbered sequence of route
advertisements that they say results in a permanent routing loop. I am afraid
I do not see this loop!

Their Step 5 says that "Router E redistributes this route into OSPF with a
cost of 5" but router E is not connected to the OSPF domain. Where exactly
is this loop? Is this a mistake, or am I missing something?

If they mean Router D in Step 5 instead of Router E, then I would have to ask,
isn't the 10.1.1.0/24 network an OSPF route on router D, given the 170 AD for
EIGRP externals? I do not think we need to worry about feedback into the OSPF
domain in the scenario they describe. Would appreciate any thoughts here.

I know ALL books have errata, and I am sure this book has lots of good stuff
in it.

Thanks!

Bob Sinclair
CCIE #10427, CCSI 30427
www.netmasterclass.net

  ----- Original Message -----
  From: Joshua Lauer
  To: john parker ; ccielab@groupstudy.com
  Sent: Wednesday, June 28, 2006 4:32 PM
  Subject: Re: Redistribution

  there's a cisco press book "optimal routing" which
  has a very good redistribution chapter that explains
  the in's and out's fairly well.

  jl

  Joshua Lauer

  CCIE#16024
  CCNP, CCDP, CCSP, CCIP, RHCE, INFOSEC

  ----- Original Message -----
  From: "john parker" <jparker232@hotmail.com>
  To: <ccielab@groupstudy.com>
  Sent: Wednesday, June 28, 2006 4:20 PM
  Subject: Redistribution

> Can anyone point me to some good docs regarding
> mutual redistribution? I am really looking for
> help with when filtering is needed as well as what
> metrics to use and when to use them.
>
> Thanks.
>
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