Re: Is there a methodical way to check full reachability?

Indeed....these would be fun and amusing TS tickets : )

On Fri, Jan 22, 2010 at 2:40 PM, Marko Milivojevic <markom_at_ipexpert.com> wrote:
> On Fri, Jan 22, 2010 at 19:22, Joe Astorino <jastorino_at_ipexpert.com> wrote:
>> The issue with the /24 loopbacks is that you will actually not have a
>> label for the LER in the MPLS cloud. What will happen is that by
>> default OSPF will advertise that /24 loopback as a /32. LDP on the
>> other hand will advertise the /24. Since your LFIB is based in part
>> by your existing routing table, and the label you received does not
>> match the prefix in your RIB (/24 vs /32) the label will never be
>> installed.
>
> ... which is exactly the reason why summarizing Loopback networks in
> MPLS networks is a big no-no :-). Well... if you wish to have your
> MPLS services actually working.
>
> One thing to note - this will probably NOT affect the "regular"
> traffic, however, anything that actually relies on MPLS (VPNs) will
> fail miserably. All along you will see the routes in the routing
> tables, but stuff will just not work.
>
> --
> Marko Milivojevic - CCIE #18427
> Senior Technical Instructor - IPexpert
>
> Mailto: markom_at_ipexpert.com
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> Community: http://www.ipexpert.com/communities
>

-- 
Regards,
Joe Astorino CCIE #24347 (R&S)
Sr. Technical Instructor - IPexpert
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