some LACP lines blocked, others not, but no noticeable differences

[Murray Itkin]

We have a fair number of different hosts attached to our edge switches via lacp. For Mac OS X hosts we use active lacp. These are working fine on other edge switches but on one particular switch a few of the lines in the lacp group are blocked. Don't understand why, I've already eliminated any STP issues. Any ideas? The below is some messages from the log and the show lacp output.

# show lacp

LACP

PORT LACP TRUNK PORT LACP LACP
NUMB ENABLED GROUP STATUS PARTNER STATUS
---- ------- ------- ------- ------- -------
1 Passive Dyn2 Up Yes Success
2 Passive Dyn2 Up Yes Success
3 Passive Dyn2 Up Yes Success
4 Passive Dyn2 Up Yes Success
7 Passive Dyn3 Up Yes Success
8 Passive Dyn3 Up Yes Success
9 Passive Dyn3 Up Yes Success
10 Passive Dyn3 Up Yes Success
11 Passive 11 Up No Success
12 Passive 12 Up No Success
13 Passive 13 Up No Success
14 Passive 14 Up No Success
15 Passive 15 Up No Success
20 Active Trk42 Up Yes Success
21 Active Trk42 Up Yes Success
22 Active Trk42 Up Yes Success
23 Active Trk42 Blocked No Failure
29 Active Trk40 Up Yes Success
30 Active Trk40 Blocked No Failure
31 Active Trk40 Up Yes Success
32 Active Trk40 Blocked No Failure
41 Passive Dyn1 Up Yes Success
42 Passive Dyn1 Up Yes Success
43 Passive Dyn1 Up Yes Success
44 Passive Dyn1 Up Yes Success
45 Passive 45 Up No Success
46 Passive 46 Up No Success
47 Passive 47 Up No Success
48 Passive 48 Up Yes Success
A1 Active Trk9 Up Yes Success
B1 Active Trk9 Up Yes Success

# log -a "port 23"
Keys: W=Warning I=Information
M=Major D=Debug
---- Event Log listing: All Events Recorded ----
I 06/02/10 14:16:41 00435 ports: port 23 is Blocked by LACP
I 06/02/10 14:16:59 00077 ports: port 23 in Trk42 is now off-line
I 06/02/10 14:24:07 00435 ports: port 23 is Blocked by LACP
I 06/02/10 14:26:28 00077 ports: port 23 in Trk42 is now off-line
I 06/02/10 14:27:42 00435 ports: port 23 is Blocked by LACP
---- Bottom of Log : Events Listed = 5 ----
# log -a "port 30"
Keys: W=Warning I=Information
M=Major D=Debug
---- Event Log listing: All Events Recorded ----
I 06/02/10 14:26:28 00077 ports: port 30 in Trk40 is now off-line
I 06/02/10 14:27:42 00435 ports: port 30 is Blocked by LACP
W 06/02/10 14:28:02 00329 FFI: port 30-Excessive CRC/alignment errors. See help.
---- Bottom of Log : Events Listed = 3 ----
1# log -a "port 32"
Keys: W=Warning I=Information
M=Major D=Debug
---- Event Log listing: All Events Recorded ----
I 06/02/10 14:24:32 00435 ports: port 32 is Blocked by LACP
W 06/02/10 14:24:47 00329 FFI: port 32-Excessive CRC/alignment errors. See help.
I 06/02/10 14:26:28 00077 ports: port 32 in Trk40 is now off-line
I 06/02/10 14:27:42 00435 ports: port 32 is Blocked by LACP
W 06/02/10 14:28:02 00329 FFI: port 32-Excessive CRC/alignment errors. See help.
---- Bottom of Log : Events Listed = 5 ----