Just checked the command reference. In the usage guidelines it states:
Usage Guidelines
If hosts do not send continuously, increase the aging time to record the dynamic entries for a longer time. Increasing the time can reduce the possibility of flooding when the hosts send again.
If you do not specify a specific VLAN, this command sets the aging time for all VLANs.
The last sentence is relevant to your question. The command may also be issued on a particular vlan.
New vlans are created after setting this parameter globally will hence be using the default values.
The key issue to check if this is a bug or not is to check whether the global command is reflected in the config. If it was, I would call the issue a bug.
As it is not, you must approach this as a parameter that can (and should) be set per vlan. After creating a new vlan, you may add this line in the script or re-issue the global command.
Regards,
Leo
