[c-nsp] "%PIM-5-NBRCHG: neighbor 0.0.0.0 UP" and 12.2(18)SXF6

[Matti Saarinen]

When we upgraded our Cat6500s to 12.2(18)SXF6, we began to see on our
PIM SM RP the following log messages.

Jan  8 14:06:00.602 UTC: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Tunnel0 (vrf default) 
Jan  8 14:06:00.606 UTC: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Tunnel0 (vrf default) DR

On the RP, there's a tunnel interface via which multicast is tunnelled
through a PIX firewall to Juniper M10i. The log message above seems to
appear every time I've modified the configuration and issued commit on
Juniper. The actual PIM neighbourhip between the boxes doesn't seem to
be affected.

6506#sh ip pim n tun0
PIM Neighbor Table
Neighbor          Interface                Uptime/Expires    Ver   DR
Address                                                            Prio/Mode
x.x.x.x            Tunnel0                  1w4d/00:01:29     v2    1 /

user at m10i> show pim neighbors 
Instance: PIM.master

Interface           IP V Mode        Option      Uptime Neighbor addr
[...]
gr-1/1/0.0           4 2             HPG        1w4d20h y.y.y.y


What could be the event that trigges the 6506 to log the message? And
why "neighbor 0.0.0.0"?

Cheers,

-- 
- Matti -