[c-nsp] filter LDP bindings

[Oliver Boehmer (oboehmer)]

Saku Ytti <> wrote on Wednesday, August 13, 2008 5:18 PM:

> On (2008-08-11 07:41 +0200), Oliver Boehmer (oboehmer) wrote:
> 
>> BTW: the LDP filter only prevents advertisement of the binding, it
>> doesn't prevent the LSR from assigning a label (the imp-null in your
>> example).
> 
> I think we had this discussion some years ago, but it would be nice,
> instead of ACLs to be able to say 'no mpls ldp label; mpls ldp label
> loop0' or so, to generate label only for loop0.

well, an LSR needs to allocate labels also for other nodes' loopbacks,
so this alone will not be enough ;-)

However, IOS now has a label allocation filter
(http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_ldp_all
oc_filter.html) having a "allocate global host-routes" shorthand to only
allocate labels for /32s (or uses a prefix-list for more granular
control)..

	oli