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6.6 Management Interface

6.6 Management Interface​

We suggest that an implementation provide a way for a system utility program to:

  • Specify that PMTU Discovery not be done on a given route.

  • Change the PMTU value associated with a given route.

The former can be accomplished by associating a flag with the routing entry; when a packet is sent via a route with this flag set, the IP layer leaves the DF bit clear no matter what the upper layer requests.

These features might be used to work around an anomalous situation, or by a routing protocol implementation that is able to obtain Path MTU values.

The implementation should also provide a way to change the timeout period for aging stale PMTU information.

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