From: Carlos Alberto Trujillo Jimenez (carlos.trujillo.jimenez@gmail.com)
Date: Fri Mar 07 2008 - 14:19:59 ARST
Hi.
Tags are maintained even if the same prefix is crossing 3 routing domains.
2008/3/7, YourPal <dearprudence28@gmail.com>:
>
> 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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