From: Scott Morris (swm@emanon.com)
Date: Mon Sep 04 2006 - 00:12:45 ART
There's no easy answer to that question. The concept, I'm sure, is that you
want all routers to reach all interfaces on all other routers there!
You will need to do some looking around (show ip route) and perhaps build
yourself a TCL script in order to first learn what things are or are not
reachable before you start. Draw it out. Start visualizing things and
determining which routes need to go from where to where.
While you're learning this valuable skill, I would also suggest keeping
"debug ip routing" on each of your routers so that way you can see the
changes everywhere.
Make sure to be as specific as possible in your redistribution, just don't
blatantly redistribute everything. Use distribute-lists or route-maps,
prefix-lists, tags, whatever you feel like, but WATCH the effect of whatever
you do!
Learn how the routers think, and that way you'll be able to get everything!
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPExpert VP - Curriculum Development
IPExpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Tandou Mohamed
Sent: Sunday, September 03, 2006 9:26 PM
To: Joshua Lauer; ccielab@groupstudy.com
Subject: Re: IPEXPERT SECTION 21 LAB C
Thanks Josh and Scott for your input. Josh like you said Mutual
redistribution everywhere is bad that's exactly my problem. i don't know
where should i do it or where shouldn't i. Scott said to look at every
individual router. i think i need to do more scenario to be able to
understand. i don't have problem with tag,prefix list, distribute list or
route-map. Let take a look at this scenario.
R1,R2,R3,R4 in frame-relay network.
R1 is hub, R3 and R4 spokes, and R2 point to point.
R1,R3 and R4 is running ospf.
R1 and R2 are running eigrp
R6 is connected to R1 and running Ripv2
R10 is connected to R4 and are running Static
i am running EBGP or IBGP in frame relay network.
What's the best practice to mutual redistribute?
Thanks,
TM
Joshua Lauer <jslauer@hotmail.com> wrote:
I'm not sure what this lab is since I dont have it but...
normally you'll want to do the minimal amount of redistribution necessary to
gain full reachability.
Mutual redistribution everywhere is usually a bad idea, are your stopping
route-feedback and other nasties with tags? Ipexpert has an online forum are
you finding anything there?
JL
Joshua Lauer
CCIE#16024
CCNP, CCSP, CCDP, CCIP, INFOSEC
----- Original Message -----
From: "Tandou Mohamed"
To:
Sent: Saturday, September 02, 2006 11:30 PM
Subject: IPEXPERT SECTION 21 LAB C
> Hello everyone,
> i need a help about redistribute anytime i do it i get routing loop.
> i am doing ipexpert workbook R&S section 21 lab C.
> scenario:
> R1 is running ospf area 0 with R2 on
> fastethernet.
>
> There is frame relay running on R2,R4,R5 and R6
>
> R2 is running eigrp on the frame link with R4, R5 and R6 and also
> running rip with R5 on second Serial1.
>
> R5 is running ospf area 0 with R6 and R7 on FastEthernet, eigrp on
> frame relay link with R2, R4, and R6 on serial interface, running rip
> with
> R2 on serial 1
>
> R6 is running ospf area 0 with R5 and R7 on FastEthernet, eigrp on
> frame relay link with R2, R4, and R5 on serial interface
>
> R4 is just running eigrp with R2, R5, and R6 on frame link.
>
> R7 is running ospf area 0 with R5 and R6 on fastethernet and area 0 on
> serial connection with
> R8
>
> R8 is running ospf area 0 with R7 on serial and rip with BB2
>
> My configuration looks like this:
>
> On R2 i redistribute rip into ospf and eigrp, on eigrp i redistribute
> rip and ospf and finally on ospf i redistribute rip and eigrp
>
> On R5 i redistribute rip into ospf and eigrp, on eigrp i redistribute
> rip and ospf and finally on ospf i redistribute rip and eigrp
>
> On R6 i redistribute ospf into eigrp and eigrp into ospf
>
> On R8 redistribute rip into ospf and ospf into rip.
>
> i am getting routing loop when i ping from R6 to
> R1
> i can't ping from R7 or R8 to either R5,R6 or R7.
>
> Can someone explain what i am doing wrong. i know there are a lot of
> redistribution maybe i am not suppose to redistribute somewhere.
>
> Thanks,
>
> TM
>
>
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