Cogent now peering with Sprint?

Tue Oct 31 14:51:47 UTC 2006

> 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

11  sprint.iad01.atlas.cogentco.com (154.54.13.62)  12.032 ms  12.061 ms
12.103 ms

9  sprint.dfw03.atlas.cogentco.com (154.54.10.18)  21.964 ms  21.897 ms
21.756 ms

Etc..

And comm tags from Sprint side look similar to other SFI's:

  1239 174 
    144.228.241.81 from 144.228.241.81 (144.228.241.81)
      Origin IGP, metric 4294967294, localpref 100, valid, external
      Community: 1239:321 1239:1000 1239:1011

  1239 209 
    144.228.241.81 from 144.228.241.81 (144.228.241.81)
      Origin IGP, metric 4294967294, localpref 100, valid, external
      Community: 1239:321 1239:1000 1239:1011

> 
> Anyone who thinks "X pays Y" is more important than any of the
> metrics above needs to reevaluate their priorities.  (At least from a
> customer / engineering PoV.  I wouldn't suggest $NETWORK's bean
> counters have the same priorities as their network engineers &
> customers. :)
> 
> IMHO, of course.

Indeed, at the end of the day, it really doesn't matter these days :)

james