On Tue, Oct 31, 2006 at 09:51:47AM -0500, James Jun wrote:
On Oct 31, 2006, at 2:12 AM, Bob Collie wrote:
That looks like a transit connection that Cogent bought at Ashburn, VA, not SFI peering connection.
Hrmm, I can't tell by looking at a traceroute who paid whom, if anyone. Care to explain your magic? Is there a code in the in- addrs? Perhaps "sl-$FOO" means something in Sprint-speak?
Yea, but most of xfer-nets in this case appear to be assigned by Cogent (then again, how does that make any difference for special buy|peer cases):
2 sl-st21-la-13-0.sprintlink.net (144.232.20.69) 4 msec 4 msec 4 msec 3 p12-3.core01.lax05.atlas.cogentco.com (154.54.13.41) [AS 174] 4 msec 4 msec 4 msec
customers have some say over whats what.. at least one of my transits is using a /30 we assign to be honest i'd be suspicious if 'most ' nets are from cogent as thats not indicative of an equal peering relationship they still buy from verio and they have /30s with them also: 58.13.54.154.in-addr.arpa domain name pointer verio.sjc03.atlas.cogentco.com. (of course, that may be a peer port too.. this is all conjecture! as patrick says the adjacencys are the interesting thing, not the $$) Steve