Sprint v. Cogent, some clarity & facts
Tomas L. Byrnes
tomb at byrneit.net
Tue Nov 4 10:51:19 CST 2008
The concept of "Transit Free" is a political failure, not a technical
The protocols are designed, and the original concept behind the Internet
is, to propagate all reachability via all paths. IE to use Transit if
Not doing so is a policy decision that breaks the redundancy in the
>From: Patrick W. Gilmore [mailto:patrick at ianai.net]
>Sent: Tuesday, November 04, 2008 8:10 AM
>To: NANOG list
>Subject: Re: Sprint v. Cogent, some clarity & facts
>On Nov 4, 2008, at 11:02 AM, David Schwartz wrote:
>> Patrick W. Gilmore wrote:
>>> On Nov 4, 2008, at 9:49 AM, David Freedman wrote:
>>>>> 2. The Internet cannot "route around" de-peering
>>>>> I know everyone believes "the Internet routes around failures".
>>>>> occasionally true, it does not hold in this case. To "route
>>>>> around" the
>>>>> "failure" would require transit. See item #1.
>>>> The internet "routes around" technical failures, not political
>>> If two transit free networks have a technical failure which disables
>>> all peering between them, the Internet cannot route around it.
>> Sure it can. The traffic just flows through any of the providers
>> that still
>> have reliable high-bandwidth connectivity to both of those providers.
>> Unless, of course, a pre-existing political failure prohibits this
>> The Internet can't route around that political failure.
>Perhaps you missed the "transit free" part.
>If Sprint & UUNET have a technical failure causing all peering to go
>down, Level 3 will not magically transport packets between the two,
>despite the fact L3 has "reliable high-bandwidth connectivity to both
>of those providers". How would you propose L3 bill UU & Sprint for
>it? On second thought, don't answer that, I don't think it would be a
>Or are you claiming the fact every network does not give every other
>network transit a "political failure". If you are, we should agree to
>disagree and move on.
>> From a technical standpoint, the Internet is always suffering from
>> political failures. This leaves it vulnerable to small technical
>> failures it
>> could otherwise route around.
>See above. I do not think it is a "political failure" that I do not
>give you free transit.
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