On Tuesday 13 November 2007, Mark Shields wrote: > On Nov 12, 2007 6:59 PM, Grant <[EMAIL PROTECTED]> wrote: > > I just switched from DSL to cable and I'm noticing a significant delay > > when using Skype, even when nothing else is happening on my network. > > Has anyone else noticed this and had success "fixing" it? I'm using a > > Gentoo router so I can try just about anything. > > > > - Grant > > -- > > [EMAIL PROTECTED] mailing list > > I work for as a cable modem technician. The first thing to check for when > you're having cable internet problems is the modem. Call up tech support > and ask them to check the signals on the modem (upstream power, downstream > rcv, downstream SNR, upstream SNR, headend receive) and make sure they're > in range. Also ask them to ping and (if available) rf ping to check for > latency/packet loss. Also ask them to check the circuits/backbone. Also, > can you reproduce this latency in the form of a ping/traceroute? This will > go a long way with ISPs in determining where the problem is (although > Comcast just blows off high latency on pings as the result of dropping them > due to lower priority).
Interesting to hear this. The OP will no doubt have a different traceroute to show the ISP, but does the comment on dropping pings explain the % loss shown below in certain hops, or is it just a matter of overloaded switches? ========================================================================== HOST: lappy Loss% Snt Last Avg Best Wrst StDev 5. 217.41.177.66 0.0% 15 17.9 18.0 15.7 22.8 1.7 6. 217.41.177.134 6.7% 15 21.0 17.5 15.7 21.0 1.5 7. 217.41.177.54 0.0% 15 17.0 16.6 15.1 20.7 1.4 8. 217.47.166.106 0.0% 15 16.0 16.9 15.3 18.9 1.1 9. core1-pos5-2.faraday.ukcore. 0.0% 15 17.0 45.3 15.2 192.3 52.7 10. core1-pos0-15-0-10.ilford.uk 0.0% 15 18.9 18.3 17.1 19.5 0.7 11. 194.74.77.222 0.0% 15 18.1 17.1 15.5 19.1 1.0 12. t2c1-ge14-0-0.uk-ilf.eu.bt.n 6.7% 15 17.9 17.3 15.7 19.1 0.9 13. t2c1-p4-0-0.us-nyc.eu.bt.net 0.0% 15 107.3 108.1 106.1 109.7 1.1 14. 12.116.102.17 0.0% 15 108.3 107.9 105.5 110.0 1.3 15. tbr1.n54ny.ip.att.net 0.0% 15 133.2 133.8 131.2 135.4 1.4 16. cr2.n54ny.ip.att.net 0.0% 15 135.2 133.5 131.6 135.7 1.3 17. cr2.wswdc.ip.att.net 0.0% 15 132.2 132.9 131.3 134.7 1.1 18. cr1.attga.ip.att.net 0.0% 15 134.2 133.6 132.1 135.7 1.2 19. tbr2.attga.ip.att.net 0.0% 15 135.2 134.0 132.0 136.2 1.3 20. gar4.attga.ip.att.net 0.0% 15 132.2 134.1 130.0 159.4 7.1 21. 12.124.64.62 20.0% 15 140.2 138.6 137.0 140.4 1.1 22. te-9-1-ur01.south.tn.knox.co 6.7% 15 141.2 140.4 138.1 141.5 1.0 23. te-8-3-ur02.west.tn.knox.com 0.0% 15 141.2 140.3 139.1 141.2 0.6 24. ge-1-46-ur01.west.tn.knox.co 0.0% 15 138.2 138.6 137.8 140.6 0.9 ========================================================================== Note some of these are being dropped in the UK, rather than by Comcast. -- Regards, Mick
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