From: Gary Duncanson (gary.duncanson@googlemail.com)
Date: Sat Oct 13 2007 - 19:00:03 ART
Hi Jo,
Obviously this is hard without the workbook but I have drawn the topology
out using the instructions you emailed me offline.
I think this is the topology
OSPF Area 0 ---R1
-EIGRP- R6- RIP------BB1 +BB2
OSPF Area 0 ---- --R2
You asked what the metric settings are supposed to be doing on R1 and R2.
Well as I read it, they will provide a means for OSPF Area 0 routers to
elect to use R1 or R2 to get to certain routes. You say that they are set to
the same thing and ask..what does that achieve? But from the looks of things
the metrics are not the same thing...
R6 redistributes routes from RIP into EIGRP with different tags for routes
from BB1 (tag = 1) and routes from BB2 (tag =3).
Now once you look at redistributing EIGRP into OSPF on R1 and R2 look at the
route map EIGRP2OSPF. You can see on R1 this sets the metric to 1 for routes
with a tag of 1. All other EIGRP routes redistributed into OSPF I think will
have a metric of 20. So expect OSPF routers to prefer R1 to get to BB1's
212.18.0.0/22.
In the case of R2 the route map EIGRP2OSPF should set the metric to 1 for
routes with a tag of 3. So expect routers to prefer R2 to get to BB3's
31.0.0.0/14 and 30.0.0.0/14
So as far as Area 0 routers are concerned, the best metric to get to BB1
subnets is via R1 and the best metric to get to BB3 subnets is via R2
That's how I read things. If that's correct and the behavior of your lab
isn't the same then perhaps you have other problems?
Sorry for the late response and any inaccuracies but England have just
squeeked past France in the Rugby World Cup in Paris and I am a bottle of
Merlot to the good :)
My comisserations to France BTW.
HTH
Gary
----- Original Message -----
From: "Jo Knight" <joknight@gmail.com>
To: "Cisco certification" <ccielab@groupstudy.com>
Sent: Saturday, October 13, 2007 6:24 PM
Subject: IEWB v4 Lab 3 Task 4.9
> GS,
>
> I have been working through the redistribution task in this lab, but am
> having no luck with the provided solution guide config.
>
> The idea is that prefixes from BB1 and BB3 have been tagged accordingly
> when distributed from RIP into EIGRP on R6.
>
> R6
>
> ip prefix-list RIP_FROM_BB1 seq 5 permit 212.18.0.0/22 ge 24 le 24
> !
> ip prefix-list RIP_FROM_BB3 seq 5 permit 31.0.0.0/14 ge 16 le 16
> ip prefix-list RIP_FROM_BB3 seq 10 permit 30.0.0.0/14 ge 16 le 16
> !
> !
> !
> route-map RIP2EIGRP permit 10
> match ip address prefix-list RIP_FROM_BB1
> set tag 1
> !
> route-map RIP2EIGRP permit 20
> match ip address prefix-list RIP_FROM_BB3
> set tag 3
> !
> route-map RIP2EIGRP permit 30
>
> I am happy that the tagging is identifying routes as if I redistribute
> between EIGRP and OSPF on R1 I see the tags on R5 for example
>
> My issue is when I follow the solutions guide and apply the following
> config on R1 and R2, what should the following config acheive?
>
> R1
>
> route-map EIGRP2OSPF permit 10
> match tag 1
> set metric 1
> !
> route-map EIGRP2OSPF permit 1000
> !
>
> router ospf 1
> redistribute eigrp 100 subnets route-map EIGRP2OSPF
>
>
> R2
>
> route-map EIGRP2OSPF permit 10
> match tag 3
> set metric 1
> !
> route-map EIGRP2OSPF permit 1000
> !
>
> router ospf 1
> redistribute eigrp 100 subnets route-map EIGRP2OSPF
>
> When I apply this I see the routes from BB1 and BB3 but they all flow
> through R1. Can someone explain what the metric settings are supposed to
> be doing on R1 and R2? If they are set to the same thing then what does
> this achieve?
>
> Thanks,
> Jo
>
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