remember the "diameter of the internet"?
Mathew Lodge
mathew at cplane.com
Tue Jun 18 18:20:59 UTC 2002
At 01:33 PM 6/18/2002 -0400, Pawlukiewicz Jane wrote:
>Are you asking _why_ there are so many hops between yourself and the guy
>across town?
He's not, but answer is that BGP's key metric is AS path length. This can
have very little to do with the optimality (expressed as efficient use of
resources) of the actual packet path.
Cheers,
Mathew
>Jane
>
>brett watson wrote:
> >
> > i sit behind cox-cable service at home, and in troubleshooting why my
> > connectivity is *so* horrible, i find the following traceroute. does
> > anyone do any sane routing anymore? does diameter matter (we used to talk
> > about it a long, long while ago). i guess i'm just old and crusty but this
> > seems to violate so many natural laws.
> >
> > i find in more random testing that i seem to be a minimum of 15 hops from
> > anything, and it's not just the # of hops, it's the *paths* i travel.
> > bouncing between two cities several times, on several different provider
> > networks, from one border to the other.
> >
> > wow.
> >
> > -b
> >
> > traceroute www.caida.org
> >
> > 1 10.113.128.1 30 unavailable
> > 2 68.2.6.25 10 ip68-2-6-25.ph.ph.cox.net
> > 3 68.2.0.26 40 ip68-2-0-26.ph.ph.cox.net
> > 4 68.2.0.18 50 ip68-2-0-18.ph.ph.cox.net
> > 5 68.2.0.10 20 ip68-2-0-10.ph.ph.cox.net
> > 6 68.2.0.70 10 ip68-2-0-70.ph.ph.cox.net
> > 7 68.2.14.13 10 chnddsrc02-gew0303.rd.ph.cox.net
> > 8 68.1.0.168 20 chndbbrc02-pos0101.rd.ph.cox.net
> > 9 68.1.0.146 30 dllsbbrc01-pos0102.rd.dl.cox.net
> > 10 12.119.145.125 40 unavailable
> > 11 12.123.17.54 30 gbr6-p30.dlstx.ip.att.net
> > 12 12.122.5.86 51 gbr4-p90.dlstx.ip.att.net
> > 13 12.122.2.114 80 gbr2-p30.kszmo.ip.att.net
> > 14 12.122.1.93 50 gbr1-p60.kszmo.ip.att.net
> > 15 12.122.2.42 70 gbr4-p40.sl9mo.ip.att.net
> > 16 12.122.2.205 60 gbr3-p40.cgcil.ip.att.net
> > 17 12.123.5.145 60 ggr1-p360.cgcil.ip.att.net
> > 18 207.88.50.253 90 unavailable
> > 19 64.220.0.189 80 ge5-3-1.RAR1.Chicago-IL.us.xo.net
> > 20 65.106.1.86 70 p0-0-0-0.RAR2.Chicago-IL.us.xo.net
> > 21 65.106.0.34 60 p1-0-0.RAR1.Dallas-TX.us.xo.net
> > 22 65.106.0.14 120 p6-0-0.RAR2.LA-CA.us.xo.net
> > 23 64.220.0.99 80 ge1-0.dist1.lax-ca.us.xo.net
> > 24 206.111.14.238 211 a2-0d2.dist1.sdg-ca.us.xo.net
> > 25 209.31.222.150 80 unavailable
> > 26 198.17.46.56 140 pinot.sdsc.edu
> > 27 192.172.226.123 91 cider.caida.org
More information about the NANOG
mailing list