Re: ospf distance

Sorry made a typo, forget a NOT in the 1st sentence which makes it totally
wrong

> Message du 25/07/12 C 16h25
> De : "Gilles Fabre"
> A : "shekhar sharma" , "Aaron"
> Copie C : "Cisco certification"
> Objet : Re: ospf distance
>
> As Marc said, distance is NOT a parameter we can use to set a preference
INSIDE
> the same routing protocol
> Distance is a differentiation between different protocols
>
> Another example would to configure the following :
>
> distance ospf inter-area 110 intra-area 180
> This would allow eigrp external routes to be preferred over OSPF intra-area
> routes
> BUT inside OSPF intra-area routes would still be prefered over inter-area
> since distance is not taken into account inside OSPF
>
> To prefer inside OSPF, I see 2 solutions :
> B - play with metric-type : intra-area is better than inter-area which is
> better than external 1 with is better than external 2 (or N1/N2 for NSSA
> area)
> B - play with metric (lower cost)
>
> Route filtering is another option
>
> Hope that is clear.
>
> > Message du 25/07/12 C 15h49
> > De : "shekhar sharma"
> > A : "Aaron"
> > Copie C : "Gilles FABRE" , "Cisco certification"
> > Objet : Re: ospf distance
> >
> > Aaron,
> >
> > i know numerous ways to disable load-balance.....
> >
> > But i want to check the particularly its beaviour with distance
.......thts
> > nt wrking in my case......
> >
> >
> >
> >
> > On Wed, Jul 25, 2012 at 5:38 PM, Aaron wrote:
> >
> > > isn't that to be expected since you altered learned routes from
150.1.4.4
> > > to
> > > all be same AD.....and then if they have same metric LB will occur. If
> you
> > > don't won't load balancing, perhaps alter ip ospf cost on one of your
> > > interfaces towards 142.1.0.4 or 142.1.0.3. I see them on s0/0.....is
that
> > > over a frame relay cloud? If so can you alter metric or cost in a frame
> > > relay map and make one look less attractive than the other? Or perhaps
> put
> > > them on subinterfaces as p-to-p and do the aforementioned ip ospf cost
on
> > > R5's subint towards the less desireable next hop
> > >
> > > -----Original Message-----
> > > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> > > shekhar sharma
> > > Sent: Wednesday, July 25, 2012 7:40 AM
> > > To: Gilles FABRE
> > > Cc: Cisco certification
> > > Subject: Re: ospf distance
> > >
> > > Try that already ,
> > >
> > > Distance changed but still it load-balance
> > >
> > > R5(config)#router ospf 1
> > > R5(config-router)#distance 109 150.1.4.4 0.0.0.0
> > >
> > > R5#sh ip route 142.1.34.3
> > > Routing entry for 142.1.34.0/24
> > > Known via "ospf 1", distance 109, metric 65, type intra area
> > > Last update from 142.1.0.4 on Serial0/0, 00:01:16 ago
> > > Routing Descriptor Blocks:
> > > 142.1.0.4, from 150.1.4.4, 00:01:16 ago, via Serial0/0
> > > Route metric is 65, traffic share count is 1
> > > * 142.1.0.3, from 150.1.4.4, 00:01:16 ago, via Serial0/0
> > > Route metric is 65, traffic share count is 1
> > >
> > >
> > >
> > >
> > > On Wed, Jul 25, 2012 at 4:12 PM, Gilles FABRE
> > > wrote:
> > >
> > > > For OSPF, you should refer not to neighbor adress but router-id
> > > >
> > > > please try instead :
> > > >
> > > > distance 109 150.1.4.4 0.0.0.0
> > > >
> > > > Best regards.
> > > >
> > > > > Message du 25/07/12 ` 12h02
> > > > > De : "shekhar sharma"
> > > > > A : "Cisco certification"
> > > > > Copie ` :
> > > > > Objet : ospf distance
> > > >
> > > > >
> > > > > Hi All,
> > > > >
> > > > >
> > > > > I was working with manipulating OSPF distance.
> > > > >
> > > > > Not able to change ospf distance per neigbour...Not sure if this is
> > > > config
> > > > > issue or OSPF doesn't support it like EIGRP
> > > > >
> > > > > R5(config-router)#router ospf 1
> > > > > R5(config-router)#distance 109 142.1.0.4 0.0.0.0
> > > > >
> > > > > R5#sh ip route 142.1.34.4
> > > > > Routing entry for 142.1.34.0/24
> > > > > Known via "ospf 1", distance 110, metric 65, type intra area Last
> > > > > update from 142.1.0.4 on Serial0/0, 00:00:36 ago Routing Descriptor
> > > > > Blocks:
> > > > > 142.1.0.4, from 150.1.4.4, 00:00:36 ago, via Serial0/0 Route metric
> > > > > is 65, traffic share count is 1
> > > > > * 142.1.0.3, from 150.1.4.4, 00:00:36 ago, via Serial0/0 Route
> > > > > metric is 65, traffic share count is 1 Regards, Shekhar
> > > > >
> > > > >
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> > > > >
> > > > >
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Received on Wed Jul 25 2012 - 16:28:16 ART