Actually, without the sham link, the type 3 LSA's don't even show up in the CE 
router database. Once I bring up the sham link, the type 3's show up.

Doug

Samir Idris <[email protected]> wrote:

>Doug,
>
>I have looked at the topology and your explanation.
>
>I am looking at MelonHQ and MelonBranch to start with.  With no sham-link
>in place when you apply show ip ospf database what LSAs do you see?  Do you
>see any LSA type 3?  I am imagining you should see them in the database but
>in the route table you should only see O routes provided backdoor link and
>customer site used Area 0 altogether.
>Once you break the backdoor link, the type 3 LSA from the database should
>appear in the route table as IA.
>
>Is this what you see?  Sorry if you have answered such questions before.
>
>Regards,
>Samir.
>
>
>
>
>On Thu, Nov 15, 2012 at 12:12 PM, <[email protected]> wrote:
>
>> I'm working on a sham link lab, and came across some behavior I don't
>> understand. I've got the MPLS L3VPN built, and routes are being learned
>> across it properly. Everything is in area 0, and I've used the same
>> process ID for the vrf on both PE's. I do not have the sham link
>> configured yet, so all traffic is going over the back-door link.
>>
>> The thing I don't understand is that there are no Type3 LSA's anywhere,
>> not on the CE routers, nor on the PE vrf's. I only see type 1 and Type 2
>> LSA's. If I shut down the back-door link, the Type 3's show up, along
>> with the O IA routes as expected.
>>
>> I would think that while the back-door is up, we would see the Type 2
>> LSA's coming across the back-door link, as well as the Type 3 LSA's
>> being redistributed from MP-BGP.
>>
>> What am I missing?
>>
>> Thanks,
>>
>> Doug
>> _______________________________________________
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>
>
>
>-- 
>Samir Idris
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