Usage Scenario
You can change the lifetime of a PMTU by setting an aging time for the PMTU.
If you want to slow down PMTU aging, run the
ipv6 pathmtu age command to change the aging time of the PMTU to a larger value.
Configuration Impact
This command can be used to change only the aging time of dynamic PMTUs. It is not applicable to static PMTUs because static PMTUs cannot age.
Precautions
The priority of a static PMTU is higher than that of a dynamic PMTU. If the static PMTU exists, the dynamic PMTU does not take effect.
The aging time for the PMTU is valid only for the dynamic PMTU entries generated after this configuration, instead of the PMTU entries generated before this configuration.