nanog mailing list archives
Re: level3.net in Chicago - high packet loss?!?
From: Joe Maimon <jmaimon () ttec com>
Date: Tue, 06 Sep 2005 10:35:03 -0400
If the hop(s) following the one you see loss for shows no loss, then disregard the loss for that hop, obviously whatever it is, it does not affect transit, which is what you really want to know.
Is that correct? Network Fortius wrote:
And how exactly would you interpret the number returned by net_loss (int), in a column called "LOSS", in reference to reachability of a "hop" between two end points:int net_loss(int at) { if ((host[at].xmit - host[at].transit) == 0) return 0; /* times extra 1000 */return 1000*(100 - (100.0 * host[at].returned / (host[at].xmit - host[at].transit)) );} ? Thanks, Stef Network Fortius, LLC On Sep 6, 2005, at 7:45 AM, Robert E.Seastrom wrote:Network Fortius <netfortius () gmail com> writes:Anybody having any idea why such a high packet loss on lever3's network, in Chicago?End-user misinterpreting output from MTR. This network does not appear to have any packet loss end-to-end. ---RobStef:~ scm$ mtr -r www.yahoo.com ... tbr1-p010802.cgcil.ip.att.net 0% 16 16 15.12 24.21 49.26 ggr2-p310.cgcil.ip.att.net 0% 16 16 13.18 42.66 118.99 so-1-1-0.edge1.chicago1.level3.net 0% 16 16 14.48 35.84 126.48 so-2-1-0.bbr1.chicago1.level3.net 63% 6 16 14.44 43.74 79.97^^^^^^^as-1-0.bbr2.sanjose1.level3.net 0% 16 16 61.95 80.64 176.01 ge-10-2.ipcolo3.sanjose1.level3.net 0% 16 16 63.37 95.61 148.46 unknown.level3.net 0% 16 16 63.34 86.46 168.62 unknown-66-218-82-217.yahoo.com 0% 16 16 62.09 88.91 127.58 p4.www.scd.yahoo.com 0% 16 16 64.51 89.96 183.79 TIA, Stef Network Fortius, LLC
Current thread:
- level3.net in Chicago - high packet loss?!? Network Fortius (Sep 05)
- Re: level3.net in Chicago - high packet loss?!? Robert E . Seastrom (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Network Fortius (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Joe Maimon (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? chip (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Christopher L. Morrow (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? sdb (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Christopher L. Morrow (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? sdb (Sep 07)
- Re: level3.net in Chicago - high packet loss?!? Network Fortius (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Robert E . Seastrom (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Steven M. Bellovin (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Network Fortius (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Alexander Koch (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Network Fortius (Sep 06)
- Re: level3.net in Chicago - high packet loss?!? Scott Altman (Sep 06)