I have implemented a logging discriminator (workaround for CSCvi84511) as follows:
logging discriminator AP_Dup severity drops 3 facility drops CDP mnemonics drops DUPLEX_MISMATCH
logging host 10.2.3.4 discriminator AP_Dup
logging buffered discriminator AP_Dup
This works perfectly on all of my 2960, 3560, 3850 & 4500 switches but NOT on any of my various 3750 & 3750X switches. They accept the commands but I still get the messages in the buffer and my syslog server:
Jul 25 10:53:09 BST: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet1/0/46 (not half duplex), with GRI-N64-05 GigabitEthernet0 (half duplex). (GRI64_3750X_ST01-1)
show logging on an affected switch shows :
Active Message Discriminator:
AP_Dup severity group drops 3
facility drops CDP
mnemonics drops DUPLEX_MISMATCH
No Inactive Message Discriminator
Buffer logging: level debugging, 120424 messages logged, xml disabled,
filtering disabled, discriminator(AP_Dup),
0 messages rate-limited, 7887 messages dropped-by-MD
Trap logging: level informational, 130556 message lines logged
Logging to 10.2.3.4 (udp port 514, audit disabled,
authentication disabled, encryption disabled, link up),
127267 message lines logged,
0 message lines rate-limited,
3281 message lines dropped-by-MD,
xml disabled, sequence number disabled
filtering disabled
Anyone else come across this issue or know why it only seems to affect 3750s? We have 300+ 3750's so tha's a lot of useless log entries!
