While reloading a Cisco Catalyst 3560 running IOS 12.2(55)SE the other day, I noticed the switch stopped sending messages to the configured IPv6 enabled syslog host. Nothing appeared in the log files on the syslog host until I manually disabled and reenabled the log statement.

Read More → Logging messages from Cisco IOS 12.2(55)SE to an IPv6 enabled syslog host