Re: BGP to OSPF Redistribution w/ Sham-Link

You are right in all the assumptions. However, there could be a third
site, which doesn't have a sham-link. In that case, those routes would
be unreachable,

--
Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert
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On Tue, Oct 11, 2011 at 11:53, Yuri Bank <yuribank_at_gmail.com> wrote:
> Yeah it works fine without redistributing BGP into OSPF.
>
> My theory is that because the Sham-Link is up, LSAs are flooded and reach
> the CE without any problems.
>
> However, all of the labs, documentation etc show otherwise (redistribution
> of BGP into OSPF), which simply isn't necessary in my opinion. I'm just
> curious if anyone else has noticed this? Of course, if you aren't using a
> sham-link, redistribution of BGP into OSPF is necessary.
>
> -Yuri
>
> On Tue, Oct 11, 2011 at 11:23 AM, Marko Milivojevic <markom_at_ipexpert.com>
> wrote:
>>
>> What happened when you labbed it up? Did it work? :-)
>>
>> --
>> Marko Milivojevic - CCIE #18427
>> Senior Technical Instructor - IPexpert
>>
>> FREE CCIE training: http://bit.ly/vLecture
>>
>> Mailto: markom_at_ipexpert.com
>> Telephone: +1.810.326.1444
>> Web: http://www.ipexpert.com/
>>
>> On Tue, Oct 11, 2011 at 11:09, Yuri Bank <yuribank_at_gmail.com> wrote:
>> > I'm curious if this is really necessary? I've done this in my lab and it
>> > seems to work fine. I understand that you MUST redistribute OSPF into
>> > BGP on
>> > your PE, so that appropriate VPN labels are advertised to the remote PE.
>> > However, I see no reason to redistribute BGP into OSPF, since the LSAs
>> > are
>> > getting advertised through the sham-link, and the CE routers will have a
>> > complete LinkState Database from that.
>> >
>> > Is there anything that I'm missing?
>> >
>> > -Yuri
>> >
>> >
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