Re: OSPF Sham Links?

HI!

I believe the way that is supposed to work is that you advertise your
newly created loopbacks into BGP. Please see the following link:

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t8/feature/guide/ospfshmk.html#wp1035280

On Tue, Mar 23, 2010 at 6:47 PM, Group Study <gs_at_netengineer.org> wrote:
> I'm doing an MPLS lab on OSPF Sham links and I'm a bit confused.
>
> On my two PEs, R3 and R4, I create a loopback each and then put them
> into a VRF but I'm not putting these interfaces or host subnets into a
> routing protocol. R3 and R4 have 2 P routers in between them that are
> speaking ISIS as the IGP and R3 and R4 are MP-BGP (iBGP) peers. R3 is
> also connected SW2 (CE) and R4 is connected to R6 (CE) and they have a
> backdoor link connected to each other. The CE-PE protocol is OSPF.
>
> How does R3 know about the Loopback of R4, the destination of the OSPF
> Sham link and vice versa?
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
Regards,
Joe Astorino - CCIE #24347 (Earned not bought)
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