5.4. Dealing with Large Encapsulated Packets

5.4. Dealing with Large Encapsulated Packets

This section proposes two mechanisms to deal with packets that exceed the path MTU between the ITR and ETR.

It is left to the implementor to decide if the stateless or stateful mechanism should be implemented. Both or neither can be used, since it is a local decision in the ITR regarding how to deal with MTU issues, and sites can interoperate with differing mechanisms.

Both stateless and stateful mechanisms also apply to Re-encapsulating and Recursive Tunneling, so any actions below referring to an ITR also apply to a TE-ITR.