Re: Mutual Redistribution

From: YourPal (dearprudence28@gmail.com)
Date: Fri Mar 07 2008 - 14:01:43 ARST


Hi Rik,

My question is slightly off topic. I'm testing tagging of IGP routes in a
scenario of 3 routing domains, as follows:

(EIGRP 10) R6 (EIGRP 100) R3 (OSPF 1) R5

R6:
router eigrp 100
 redistribute eigrp 10 route-map EIGRP_10_TO_100
!
route-map EIGRP_10_TO_100 permit 10
 set tag 10
!

R3:
router ospf 1
 redistribute eigrp 100 subnets
!

When R3 redistributes eigrp 100 into OSPF, does tag 10 follow into OSPF
domain? On R5 I noticed those OSPF routes (originated in EIGRP AS 10) have
the tag 10. See results below:

R3#sh ip ro 54.1.1.0
Routing entry for 54.1.1.0/24
  Known via "eigrp 100", distance 170, metric 2684416
  Tag 10, type external
  Redistributing via eigrp 100, ospf 1

R5#sh ip ro 54.1.1.0
Routing entry for 54.1.1.0/24
  Known via "ospf 1", distance 110, metric 20
  Tag 10, type extern 2, forward metric 1

Please advise.

Thank you.

BR,
Emil

On 1/11/08, Rik Guyler <rguyler@gmail.com> wrote:
>
> Yes, that's pretty much the idea. In that case I still (I'm pretty
> anal) like to tag the routes in both directions and filter based on the
> tag values "just to be sure" but really it shouldn't be necessary.
>
> If you check the archives about 3 or 4 months back, you'll find a big
> discussion on this topic between all the generals (Joeism). ;-)
>
> Rik
>
>
> On Thu, 2008-01-10 at 11:26 +0530, Monica Belluci wrote:
>
> > Hi Guys,
> >
> > If I do mutual redistribution on two ASBR connecting with same
> Autinomuos
> > systems First (EIGRP) and Second (OSPF) .
> > As I can understand EIGRP will automatically make it 170 AD for external
> > routes so optimal path will be selected .
> > please give comments..
> >
> > thanks
> > Nalini Roy
> >
> > _______________________________________________________________________
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