[c-nsp] Route not getting imported into vrf

[Pshem Kowalczyk]

Hi,

We have two PE (6500) connecting to multiply AS. Some of the routes
are best on PE1, some on PE2. Today I've noticed that for some reason,
some routes that are best on PE1 don't get installed in the vrf on
PE2:

BGP routing table entry for ab57:110118:aaa.bbb.224.0/19, version 133515951
Paths: (8 available, best #1, no table)
  Not advertised to any peer
  ddd3 ddd3 ddd3 ddd1 , (aggregated by ddd1 aaa.bbb.239.160)
    172.16.31.240 (metric 60) from 172.16.31.240 (172.16.31.240)
      Origin IGP, metric 62, localpref 110, valid, internal,
atomic-aggregate, best
      Community: ab57:5000 ab57:5700
      Extended Community: RT:ab57:115
{snip the rest of the routes}

the 172.16.31.240 is the loopback of the other PE (PE1). The weird
thing is that despite the fact PE2 receives the route locally from one
of it's eBGP peers (with lower localpref) it doesn't get installed
either.
There is no filtering on the import into the vrf.

Any ideas what might be causing this?

kind regards
Pshem