[j-nsp] RSVP neighbor sequence changes

[Eric Van Tol]

Hi all,
Two sets of routers in my network keep logging the following message:

rpd[1559]: RPD_RSVP_NBRDOWN: RSVP neighbor x.x.x.x down on interface ae0.1 nbr-type Direct, neighbor seq number change 

The interface is different on the two sets of routers, obviously.  All other RSVP sessions seem to work fine:

RSVP neighbor: 6 learned
Address       Idle Up/Dn LastChange HelloInt HelloTx/Rx MsgRcvd
x.x.x.x          0  2/1  12w4d 21:39:06        9 1282869/1282869 376297
x.x.x.x          0  2/1    19:29:02        9  7786/7786 18297
x.x.x.x          0  1/0     3:19:29        9  1322/1322 11192
x.x.x.x          5  2/1     2:54:20        9  1238/1220 1251
x.x.x.x          0  1/0    19:39:33        9  7817/7817 41623
x.x.x.x         10  0/0           8        9  1361/1361 16225

It's that last one which keeps resetting every 9 seconds.  Communication between the opposing interfaces is fine with no errors that I can see.  I've tried disabling RSVP on both sides, but this doesn't resolve the issue when it's re-enabled.

What type of situation can cause both neighbors to constantly change their sequence number?  RFC3209 shows: 

"This value MUST change when the sender is reset, when the node reboots, or when communication is lost to the neighboring node and otherwise remains the same."

None of those conditions appear to be getting met, so I'm a bit puzzled.

-evt