From: Navid (smart4D@free.fr)
Date: Sat Dec 22 2007 - 18:06:11 ART
hum...., looks like E1 is prefered over E2, whatever the metric...
Matt Sherman a icrit :
> Hello,
>
>
>
> I'm having some problems determining why a certain route is put into the
> routing table when it has a higher cost than one being received from another
> router.
>
>
>
> Here's the scenario. Router R4 is receiving redistributed EIGRP routes from
> R2 and R3. If I advertise them equally it works as planned.
>
>
>
>
>
> ****************************************************************************
> ***
>
> R4#sh ip route 145.0.0.0
>
> Routing entry for 145.0.0.0/22, 1 known subnets
>
>
>
> O E2 145.0.0.0 [110/20] via 172.16.2.3, 00:01:36, Serial1/0
>
> [110/20] via 172.16.2.2, 00:01:36, Serial1/0
>
> ****************************************************************************
> ***
>
>
>
> However if I set redistribution on R2 with a metric-type of 1, R2's route
> becomes more preferred even though its metric is higher than R3's.
>
>
>
>
>
> ****************************************************************************
> ***
>
> R4#sh ip route 145.0.0.0
>
> Routing entry for 145.0.0.0/22, 1 known subnets
>
>
>
> O E1 145.0.0.0 [110/84] via 172.16.2.2, 00:00:30, Serial1/0
>
> ****************************************************************************
> ***
>
>
>
> I can see it being deleted from the route table
>
>
>
>
>
> ****************************************************************************
> ***
>
> *Mar 1 04:28:52.078: RT: ospf's 145.0.0.0/22 (via 172.16.2.2) metric
> changed from distance/metric [110/20] to [110/84]
>
> *Mar 1 04:28:52.082: RT: del 145.0.0.0/22 via 172.16.2.3, ospf metric
> [110/20]
>
> *Mar 1 04:28:52.086: RT: NET-RED 145.0.0.0/22
>
> *Mar 1 04:28:52.086: RT: NET-RED 145.0.0.0/22
>
> ****************************************************************************
> ***
>
>
>
> If I manually specify the same metric of 84 on R2, the router goes back to
> preferring R3's route with a metric of 20.
>
> redistribute eigrp 200 metric 84 subnets
>
>
>
> ****************************************************************************
> ***
>
> *Mar 1 04:32:15.950: RT: del 145.0.0.0/22 via 172.16.2.2, ospf metric
> [110/84]
>
> *Mar 1 04:32:15.954: RT: delete subnet route to 145.0.0.0/22
>
> *Mar 1 04:32:15.958: RT: NET-RED 145.0.0.0/22
>
> *Mar 1 04:32:15.958: RT: delete network route to 145.0.0.0
>
> *Mar 1 04:32:15.962: RT: NET-RED 145.0.0.0/16
>
> *Mar 1 04:32:15.966: RT: SET_LAST_RDB for 145.0.0.0/22
>
> NEW rdb: via 172.16.2.3
>
> *Mar 1 04:32:15.970: RT: add 145.0.0.0/22 via 172.16.2.3, ospf metric
> [110/20]
>
> ****************************************************************************
> ***
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Tue Jan 01 2008 - 12:04:31 ARST