Re: OSPF Sham Links?

Nope, not doing a redistribute connected.

I'm redistributing ospf 1 vrf XYZ int bgp's ipv4 vrf XYZ and vice
versa but not redistributing anything else, including connected.

On Tue, Mar 23, 2010 at 7:37 PM, <jastorino_at_ipexpert.com> wrote:
> OK. So obviously it is getting into BGP somehow.
>
> Are you sure you are not redist connected or something
>
>
> ------Original Message------
> From: Group Study
> To: Joe Astorino
> Cc: CCIE Groupstudy
> Subject: Re: OSPF Sham Links?
> Sent: Mar 23, 2010 7:11 PM
>
> Joe,
>
> I saw this link too... The funny thing is, I'm not advertising the
> Loopbacks for the Sham link anywhere... It's just in a vrf, I didn't
> specify the network for the loopbacks under ospf nor did I advertise
> it in BGP....
>
> Weird...
>
> Any thoughts on R3 knows of R4s loopback for the sham link? It shows
> up as an iBGP route in the vrf routing table... but I don't know how
> it got there...
>
>
>
>
> On Tue, Mar 23, 2010 at 7:01 PM, Joe Astorino <jastorino_at_ipexpert.com> wrote:
>> 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
>>>
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>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>> --
>> Regards,
>>
>>
>>
>> Joe Astorino - CCIE #24347 (Earned not bought)
>> Sr. Technical Instructor - IPexpert
>> Mailto: jastorino_at_ipexpert.com
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>
>
> Sent from my Verizon Wireless BlackBerry
>
> 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
Received on Tue Mar 23 2010 - 19:41:22 ART