Setting the aging time for dynamic path MTUs

After the device dynamically discovers the path MTU to a destination host (see "IPv6 path MTU discovery"), it performs the following operations:

• Sends packets to the destination host based on this path MTU.

• Starts the aging timer for this path MTU.

When the aging timer expires, the device removes the dynamic path MTU and discovers the path MTU again.

The aging time is invalid for a static path MTU.

1. Enter system view.

   system-view

2. Set the aging time for dynamic path MTUs.

   ipv6 pathmtu age age-time

   The default setting is 10 minutes.