IPv6 day and tunnels

Tue Jun 5 16:37:17 UTC 2012

Templin, Fred L wrote:

>> Have egresses with proper performance. That's the proper
>> operation.

> How many core routers would be happy to reassemble at
> line rates without a forklift upgrade and/or strong
> administrative tuning?

You don't have to do it with core routers.

>>> End systems are expected and required to
>>> reassemble on their own behalf.
>>
>> That is not a proper operation of tunnels.

> Why not?

Lack of transparency.

>> Even though there is no well defined value of MSL?
> 
> MSL is well defined. For TCP, it is defined in RFC793.
> For IPv4 reassembly, it is defined in RFC1122. For IPv6
> reassembly, it is defined in RFC2460.

As you can see, they are different values.

>> I'm talking about not operation guidance but proper
>> operation.
> 
> The tunnel ingress cannot count on administrative tuning
> on the egress

I'm afraid you don't understand tunnel operation at all.

> No amount of proper operation can fix a platform that
> does not have adequate performance.

Choosing a proper platform is a part of proper operation.

					Masataka Ohta