Re: OSPF SHAM-LINK

From: <ccie_ka_at_gmx.de>
Date: Tue, 30 Mar 2010 07:26:13 +0200

So normally it should be ok if I hardcoded the router-id ?!

-------- Original-Nachricht --------
> Datum: Tue, 30 Mar 2010 01:25:04 -0400
> Von: Joe Astorino <jastorino_at_ipexpert.com>
> An: ccie_ka_at_gmx.de
> CC: Ahmed Ejaz <aahmedejaz_at_gmail.com>, ccielab_at_groupstudy.com, biola_y2k_at_yahoo.com
> Betreff: Re: OSPF SHAM-LINK

> You can hard code the OSPF domain-id under the OSPF process if you
> wish. The command is simply "domain-id" under the process.
>
>
>
> On Tue, Mar 30, 2010 at 1:23 AM, <ccie_ka_at_gmx.de> wrote:
> > Currently I don't have access to my lab but I also mean the domain ID is
> the same as the router ID if this is hardcoded on both sides
> >
> >
> > -------- Original-Nachricht --------
> >> Datum: Tue, 30 Mar 2010 10:16:34 +0500
> >> Von: Ahmed Ejaz <aahmedejaz_at_gmail.com>
> >> An: Joe Astorino <jastorino_at_ipexpert.com>
> >> CC: Abiola Jewoola <biola_y2k_at_yahoo.com>, ccielab_at_groupstudy.com
> >> Betreff: Re: OSPF SHAM-LINK
> >
> >> Thats correct Joe, thanks for the correction.
> >>
> >> On Tue, Mar 30, 2010 at 10:13 AM, Joe Astorino
> >> <jastorino_at_ipexpert.com>wrote:
> >>
> >> > I believe if you are using the same OSPF process ID on both sides,
> you
> >> > should get O routes. I am pretty sure the domain-ID by default is
> >> > taken from the process ID number you are running. If they were
> >> > different domain IDs though, you should be seeing O E2 routes so that
> >> > is why I say it is a bit strange.
> >> >
> >> >
> >> >
> >> > On Tue, Mar 30, 2010 at 12:57 AM, Ahmed Ejaz <aahmedejaz_at_gmail.com>
> >> wrote:
> >> > > I guess the ospf process which you are redistributing into bgp
> >> requires a
> >> > > domain id, that is the reason it is treating it as an IA route.
> Please
> >> > add a
> >> > > domain id on both the sides and the routes should come up as O
> routes
> >> > then
> >> > > you can modify the cost to not prefer the sham link.
> >> > >
> >> > > HTH
> >> > > Ahmed
> >> > >
> >> > > On Tue, Mar 30, 2010 at 7:43 AM, Joe Astorino
> <jastorino_at_ipexpert.com>
> >> > > wrote:
> >> > >>
> >> > >> OSPF routes coming over the sham-link should be regular O routes
> >> > >> (intra-area) and thus should be preferred over O IA routes...post
> >> your
> >> > >> configurations something does not seem right about that.
> >> > >>
> >> > >>
> >> > >>
> >> > >> On Mon, Mar 29, 2010 at 10:35 PM, Abiola Jewoola
> >> <biola_y2k_at_yahoo.com>
> >> > >> wrote:
> >> > >> > Hello G.S
> >> > >> >
> >> > >> > How can i make ospf prefer to forward route routes via ospf
> >> > sham-link.
> >> > >> > The
> >> > >> > sham link has has a cost of 10 and the routes are coming as IA
> >> routes
> >> > >> > across
> >> > >> > the MPLS backbone
> >> > >> >
> >> > >> > The router is preferring the backdoor link even when i have
> >> increased
> >> > >> > the cost
> >> > >> > as high as 65000. The routes are also advertised as IA routes.
> >> > >> >
> >> > >> > Regards,
> >> > >> > Abiola
> >> > >> >
> >> > >> >
> >> > >> > Blogs and organic groups at http://www.ccie.net
> >> > >> >
> >> > >> >
> >> >
> _______________________________________________________________________
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> >> > >> >
> >> > >> >
> >> > >> >
> >> > >> >
> >> > >> >
> >> > >> >
> >> > >> >
> >> > >>
> >> > >>
> >> > >>
> >> > >> --
> >> > >> Regards,
> >> > >>
> >> > >>
> >> > >>
> >> > >> Joe Astorino - CCIE #24347
> >> > >> Sr. Technical Instructor - IPexpert
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> >> > >>
> >> > >>
> >> > >>
> >> > >>
> >> > >>
> >> > >>
> >> > >
> >> > >
> >> >
> >> >
> >> >
> >> > --
> >> > Regards,
> >> >
> >> >
> >> >
> >> > Joe Astorino - CCIE #24347
> >> > Sr. Technical Instructor - IPexpert
> >> > Mailto: jastorino_at_ipexpert.com
> >> > Telephone: +1.810.326.1444
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> >> >
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> >>
> >>
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> >>
> >> _______________________________________________________________________
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> >>
> >>
> >>
> >>
> >>
> >>
> >
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>
>
> --
> Regards,
>
>
>
> Joe Astorino - CCIE #24347
> Sr. Technical Instructor - IPexpert
> Mailto: jastorino_at_ipexpert.com
> Telephone: +1.810.326.1444
> Live Assistance, Please visit: www.ipexpert.com/chat
> eFax: +1.810.454.0130
>
> IPexpert is a premier provider of Self-Study Workbooks, Video on
> Demand, Audio Tools, Online Hardware Rental and Classroom Training for
> the Cisco CCIE (R&S, Voice, Security & Service Provider)
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> Europe, South Asia and Australia. Be sure to visit our online
> communities at www.ipexpert.com/communities and our public website at
> www.ipexpert.com

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Received on Tue Mar 30 2010 - 07:26:13 ART

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