IPv6 day and tunnels

Masataka Ohta mohta at necom830.hpcl.titech.ac.jp
Mon Jun 4 18:40:01 CDT 2012


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



More information about the NANOG mailing list