IPV6 BGP session between ASR (IOS-XR 5.1.2 SP4) to MX480 (JUNOS 11.4R6.6)

Question

Hi,
We're in the process of changing route-reflectors and have run into an interoperability problem between Cisco IOS-XR and Junos 11.4R6.6 on the MX-480 that Juniper is currently in the process of looking at.  V4 works like a charm and the sessions come up immediately.  The same may be said for both V4/V6 on other MX series devices (i.e. the MX5).
Not wishing to go into too many details, I have two questions:
1.  Has anyone else encountered this problem?  And if so,
2. Have you identified a viable workaround without upgrading the MX480 to a newer version of Junos?
Doing a hard clear of the session other on the Juniper or Cisco side 10 to 15 times produces a connect most of the time, though it can take longer sometimes.  Unhappily this is not viable option and upgrading from 11.4.R6.6 to 12.3R8.7 would require some very complicated planning.
Kind regards,
Andrew

Answer 1

I have similar problem. Did you manage to resolve the BGP-LU prefixes received over eBGP session? In my case as well all looks OK (eBGP LU session up, prefixes with labels exchanged, routing table looks OK), with the exception of CEF:
RP/0/0/CPU0:02-ASBR2#show cef 172.16.20.2/32 detail 
Thu Jul  3 14:48:04.746 UTC
172.16.20.2/32, version 393, drop adjacency, internal 0x4004001 0x0 (ptr 0xacba7fa4) [1], 0x0 (0xacba2640), 0x10 (0xacc33754)
 Updated Jul  3 14:14:07.206
 Prefix Len 32, traffic index 0, precedence n/a, priority 4
  gateway array (0xacb63e7c) reference count 18, flags 0xf2, source rib (6), 0 backups
                [7 type 5 flags 0x210101 (0xacc38048) ext 0x0 (0x0)]
  LW-LDI[type=5, refc=3, ptr=0xacba2640, sh-ldi=0xacc38048]
   via 10.9.0.3, 0 dependencies, recursive, bgp-ext [flags 0x6020]
    path-idx 0 NHID 0x0 [0xacb0ad08 0x0]
    unresolved
     local label 16016 
     labels imposed {16001}
    Load distribution: 0 (refcount 7)
    Hash  OK  Interface                 Address
    0     Y   Unknown                   drop