On Jun 14, 2011, at 12:57 AM, Michel Py wrote:

>> Keith Moore wrote:
>> 6to4 awesome.  it's those BGP advertisements for broken relay
>> routers, and those ISPs that filter protocol 41 that are bad.
> 
> I won't go as far as supporting you on this one. Anything that makes the 
> network work, good. Anything that breaks the network, bad.

There are several problems with that logic:

One problem is that the network doesn't entirely break or not break in the 
presence of feature X; it works for some people and breaks for some others.

Another is that it doesn't address tussles.  If feature X and feature Y are 
mutually incompatible, in that use of feature X breaks feature Y and vice 
versa, who is to say which feature is good and which is "breaking" the network? 

Another is that when (some) network operators configure their network in such a 
way as to break feature X, others use that breakage as an excuse to justify 
breaking even more things.

Keith

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