On Tue, 27 Aug 2013, Eric Louie wrote:
Tier 1 = Internet backbone providers (United States - AT&T, UUNET, Sprint, AboveNet/Zayo, Cogent, Qwest/CenturyLink, L3/GBLX). However, I might be better served with a Tier 2 for reachability as pointed out in another response.
Some of those providers are probably not in the DFZ. I know Cogent has been involved in some peering spats in the past. I don't know off-hand if Zayo/Above lives in the DFZ.
When you say "level of service", what are you referring to? Customer service? Service level agreement (which is pretty much the same across all the Tier 1's)?
Mainly customer service. Things like how easy it is to get a clued individual on the phone when there's an issue, turnaround time for things like BGP filter update requests. Like you mentioned, most providers' SLA terms are likely to look pretty similar if you were to compare them side-by-side. I would also look at which providers are on-net in your location, or would be willing to build into your location for a reasonable cost. One thing you want to avoid is all of your providers using the same local loop provider to get into the building, or local dark fiber providers using the same right-of-way / conduit / manhole to get into your building. Many providers might subcontract the physical last-mile construction to a local dark fiber provider. Entrance diversity and last-mile diversity is something you can probably have more influence over than how provider X gets between Chicago and New York. Many providers will build into your location if they're in your city if you either pay the build costs, or are purchasing enough service that the construction costs can amortized over the term of the contract. If they amortize, make sure you keep that in mind when the contract is up for re-negotiation, so they're no longer trying to ding you for construction costs that you've already paid :) jms