On a 4006 switch, a (spurious) topology change notification (TCN) caused the cam aging on the main vlan to be set down to 15 seconds. However, there was no further TCN for a long time (an hour or so) but the vlan 1 cam aging stayed at 15 seconds. Should it revert to the configuration value, and if so after what time or event?
By the way, we are fitting portfast to all leaf device ports to suppress spurious STP TCNs.
If you are able to help, thanks in advance!