Re: OSPF Issue with Distance

From: Narbik Kocharians (narbikk@gmail.com)
Date: Wed Aug 15 2007 - 15:38:06 ART


Julio did you try a different IOS?

On 8/14/07, Scott Morris <smorris@ipexpert.com> wrote:
>
> Yeah, that popped into my head as I was skimming over some of the
> responses
> and thought you may be doing that. You need to influence the OSPF
> election
> first using metrics, or LSA type (intra vs. inter vs. external). After
> that
> is completed, THEN the distance command will help in the routing table.
>
> HTH,
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
> #153, CISSP, et al.
> CCSI/JNCI-M/JNCI-J
> VP - Technical Training - IPexpert, Inc.
> IPexpert Sr. Technical Instructor
>
> A Cisco Learning Partner - We Accept Learning Credits!
>
> smorris@ipexpert.com
>
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> http://www.ipexpert.com
>
>
> -----Original Message-----
> From: Julio Carrasco [mailto:julio.carrasco@ya.com]
> Sent: Tuesday, August 14, 2007 6:00 AM
> To: smorris@ipexpert.com; 'NET HE'; ccielab@groupstudy.com
> Subject: Re: OSPF Issue with Distance
>
> I was using this command, cause the OSPF process is injecting two routes
> (load balancing), and I wanted to install just one at the routing table,
> so
> reducing the distance of the one that I wanted tobe installed in the
> routing
> table, seemed a good idea.
>
> Thanks !
> ----- Original Message -----
> From: "Scott Morris" <smorris@ipexpert.com>
> To: "'NET HE'" <he_net@hotmail.com>; <julio.carrasco@ya.com>;
> <smorris@ipexpert.com>; <ccielab@groupstudy.com>
> Sent: Tuesday, August 14, 2007 6:19 AM
> Subject: RE: OSPF Issue with Distance
>
>
> > Just one more note while I'm thinking about it... Let's assume
> > there's more than one router injecting those networks into the area.
> > Your distance command would need to reflect the router-id of the one
> > who was WINNING the OSPF RIB election and being handed to the routing
> > table.
> >
> > If you were picking the losing one, you'd not see any difference until
> > the other router was shut off/removed.
> >
> > HTH,
> >
> >
> > Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
> > JNCIE #153, CISSP, et al.
> > CCSI/JNCI-M/JNCI-J
> > VP - Technical Training - IPexpert, Inc.
> > IPexpert Sr. Technical Instructor
> >
> > A Cisco Learning Partner - We Accept Learning Credits!
> >
> > smorris@ipexpert.com
> >
> > Telephone: +1.810.326.1444
> > Fax: +1.810.454.0130
> > http://www.ipexpert.com
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > Of NET HE
> > Sent: Monday, August 13, 2007 6:39 PM
> > To: julio.carrasco@ya.com; smorris@ipexpert.com;
> > ccielab@groupstudy.com
> > Subject: Re: OSPF Issue with Distance
> >
> > Please use command "sh ip ospf database" to see the router-id of the
> > real advertising router for these routes.
> >
> > Speaking of your configuration, your router is in area 1, and routes
> > "139.3.6.0 and 139.3.7.0" are interarea routes. In other words, the
> > real router advertising these two routes are ABR of area 1, instead of
> > original router which inject these two routes into ospf domain.
> >
> > So puting the router-id of area 1 into the command surely will work.
> >
> >
> >>From: "Julio Carrasco" <julio.carrasco@ya.com>
> >>Reply-To: "Julio Carrasco" <julio.carrasco@ya.com>
> >>To: <smorris@ipexpert.com>, <ccielab@groupstudy.com>
> >>Subject: Re: OSPF Issue with Distance
> >>Date: Mon, 13 Aug 2007 14:48:19 +0200
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> >>
> >>I tried first with "distance 109 150.3.1.1 0.0.0.0" that is the OSPF
> >>router Id of the router that injected the router, and didn4t work also.
> >>
> >>Thanks,
> >>Julio.
> >>----- Original Message ----- From: "Scott Morris"
> >><smorris@ipexpert.com>
> >>To: "'Julio Carrasco'" <julio.carrasco@ya.com>;
> >><ccielab@groupstudy.com>
> >>Sent: Monday, August 13, 2007 2:29 PM
> >>Subject: RE: OSPF Issue with Distance
> >>
> >>
> >>>With OSPF, the "139.3.15.1 0.0.0.0" portion of the distance command
> >>>references who injected these LSAs into the area. Check out your
> >>>"show ip ospf database" for those two routes and make sure they match
> >>>the router id of that device.
> >>>
> >>>Who you see as next hop is not necessarily who brought the routes
> >>>into the area.
> >>>
> >>>HTH,
> >>>
> >>>
> >>>Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
> >>>JNCIE #153, CISSP, et al.
> >>>CCSI/JNCI-M/JNCI-J
> >>>VP - Technical Training - IPexpert, Inc.
> >>>IPexpert Sr. Technical Instructor
> >>>
> >>>A Cisco Learning Partner - We Accept Learning Credits!
> >>>
> >>>smorris@ipexpert.com
> >>>
> >>>Telephone: +1.810.326.1444
> >>>Fax: +1.810.454.0130
> >>>http://www.ipexpert.com
> >>>
> >>>
> >>>-----Original Message-----
> >>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> >>>Of Julio Carrasco
> >>>Sent: Monday, August 13, 2007 8:24 AM
> >>>To: ccielab@groupstudy.com
> >>>Subject: OSPF Issue with Distance
> >>>
> >>>Hi Group,
> >>>
> >>>I am trying to configure r5 to change the ospf distnce for some
> >>>routes learnt from router 1 (139.3.15.1) to 109.
> >>>The config I have is:
> >>>
> >>>router ospf 1
> >>>log-adjacency-changes
> >>>redistribute rip subnets
> >>>network 139.3.15.5 0.0.0.0 area 1
> >>>neighbor 139.3.15.2
> >>>neighbor 139.3.15.1
> >>>distance 109 139.3.15.1 0.0.0.0 OSPF
> >>>!
> >>>ip access-list standard OSPF
> >>>permit 139.3.2.0 0.0.0.255
> >>>permit 139.3.6.0 0.0.0.255
> >>>permit 139.3.7.0 0.0.0.255
> >>>permit 139.3.11.0 0.0.0.255
> >>>permit 139.3.0.0 0.0.0.255
> >>>!
> >>>
> >>>but When i do a show ip route, I have this:
> >>>
> >>>O IA 139.3.6.0 [110/130] via 139.3.15.2, 00:30:47, Serial0/0/0
> >>> [110/130] via 139.3.15.1, 00:30:47, Serial0/0/0
> >>>O IA 139.3.7.0 [110/130] via 139.3.15.2, 00:30:47, Serial0/0/0
> >>> [110/130] via 139.3.15.1, 00:30:47, Serial0/0/0
> >>>
> >>>Do anyone know why networks 139.3.6.0 and 139.3.7.0 remains with
> >>>distance 110 ??
> >>>
> >>>I am sure, I am missing something or I am doing something stupid, fut
> >>>I can4t find out what is.
> >>>
> >>>TIA,
> >>>Julio.
> >>>
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-- 
Narbik Kocharians
CCIE# 12410 (R&S, SP, Security)
CCSI# 30832
www.Net-WorkBooks.com


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