Templin, Fred L wrote: > I'm not sure that a randomly-chosen "skip" value is even > necessary.
It is not necessary, because, for ID uniqueness fundamentalists, single event is bad enough and for most operators, slight possibility is acceptable. > Outer fragmentation cooks the tunnel egresses at high > data rates. Have egresses with proper performance. That's the proper operation. > End systems are expected and required to > reassemble on their own behalf. That is not a proper operation of tunnels. >> Thus, don't insist on having unique IDs so much. > > Non-overlapping fragments are disallowed for IPv6, but > I think are still allowed for IPv4. So, IPv4 still needs > the unique IDs by virtue of rate limiting. Even though there is no well defined value of MSL? >> I'm talking about not protocol recommendation but proper >> operation. > > I don't see any operational guidance recommending the > tunnel ingress to configure an MRU of 1520 or larger. I'm talking about not operation guidance but proper operation. Proper operators can, without any guidance, perform proper operation. Masataka Ohta