From: kevin gannon (kevin@gannons.net)
Date: Sun Sep 25 2005 - 11:50:18 GMT-3
Jaycee but from the sh ip route both routes are IA routes no ?
Regards
Kevin
On 9/25/05, Jaycee Cockburn - BCX SS <Jaycee.Cockburn@bcx.co.za> wrote:
> Hi Stefan,
> I think this has to do with OSPF prefering the intra area routes before
> inter area routes. Area 0 routes being the backbone area will, I
> suppose, be prefered over other area's routes. What happens, just for
> kicks, if you add on R2 "area 1 virtual-link <R3 RID>" and on R3 "area 1
> virtual-link <R2 RID>"?
>
> Cheers
> JC
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Stefan Grey
> Sent: 25 September 2005 04:25 PM
> To: ccielab@groupstudy.com
> Subject: VERY INTERESTING OSPF behaviour??
>
> Hi, group,
> I see such behaviou the first time:
>
> R4
> |
> |
> R1------R2
> | __ |
> | _|
> | |
> R3----
>
>
>
>
> Between R1 and R4 is area 3, between router R3 and R1 area 0. Between R1
> and
> R2 area 0. connection between R3 - R2 area 1. As to physical
> connections:
> between R1 and R4 ethernet, between R3 and R2 ethernet. Between R1,R2
> nbma frame-relay, between R1 -R3 ISDN. Everything is configured
> correctly. R3 gets two routes about lo0 of R4 from R1 and R2.
> on R1 is configured the ip ospf 9999 command to make this route less
> preffereable than from R2. But what strange thing wee see:
>
>
> O IA 1.1.6.6/32 [110/10001] via 1.1.35.5, 00:17:32, BRI0/0
> I wonder why the less prefereble route is used?? Ok I turn of the bri0/0
> interface and look which other route I get from router R2.
>
> O IA 1.1.6.6/32 [110/76] via 1.1.23.2, 00:00:29, Ethernet0/1
> This route is the same as previous but with much better metric. Why it
> is not choosed?? But the worther one is choosed??
>
>
> Thanks,
>
> The only one advantage of the route through R1 is that R1 - R3 is in
> AREA0.
> But as we know the route is choosed just in two criterias AD/ Metric.
> I am totally confused with this.
>
> _________________________________________________________________
> The secret is out - quality Irish singles meet at Match.com!
> http://match.msn.ie/match/mt.cfm?pg=channel&tcid=237596
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sun Oct 02 2005 - 14:40:16 GMT-3