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
>> > >> Mailto: jastorino_at_ipexpert.com
>> > >> Telephone: +1.810.326.1444
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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)
>> > certification(s) with training locations throughout the United States,
>> > 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
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>>
>>
>>
>>
>>
>
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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)
certification(s) with training locations throughout the United States,
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
Blogs and organic groups at http://www.ccie.net