Lanny Marcus schrieb: > On 3/20/09, Lanny Marcus <lmmailinglists at gmail.com> wrote: > >> 2009/3/20 Tru Huynh <tru at centos.org>: >> >>> On Fri, Mar 20, 2009 at 11:02:46AM -0500, Lanny Marcus wrote: >>> >>>> ae_cw_10g.databank.com 0.0% 111.6 113.6 110.7 >>>> 126.5 4.8 >>>> pod22h_ae.layeredtech.com 0.0% 116.8 115.5 110.7 >>>> 139.7 8.7 >>>> ??? 100.0 0.0 0.0 0.0 >>>> 0.0 0.0 >>>> 162.194.232.72.static.reverse.ltdomains.com 10.0% 111.4 117.4 110.9 >>>> 140.3 9.8 >>>> [root at dell2400 ~]# >>>> >>>> >>>>> So, from this point of view, L3 seems to be losing >some packets. >>>>> >>>> At the end, when I ran the mtr command you used, ??? is losing 100% at >>>> one router within layered tech.com (the hop after >>>> pod22h_ae.layeredtech.com) and the next one, >>>> 162.194.232.72.static.reverse.ltdomains.com is losing10%? >>>> >>> 162.194.232.72.static.reverse.ltdomains.com is www.centos.org >>> >> Tru: And it's losing 10%? There seems to be a larger problem, before >> it gets to that server, within LT. If you read the last few messages >> in this thread, posted this morning (GMT -5 here), by me, Rainer and >> Per, the LT Tech should be able to track down the problem(s) within >> their DC. Take care and thank you! Lanny >> >> > Tru: Until Rainer showed the command he used "mtr -c 10 -r centos.org" > I was unaware of it, until this morning. Possibly the 10% loss at the > server is OK? This can have a variety of reasons - packet-filtering is not the least likely ;-) I don't think centos.org is just sitting there with no iptables etc. I can reach centos.org from my colo-box perfectly (via lynx) - but I'm not sure why I would need 16 or 17 hops to do that - and even 20 for layeredtech.com. I can reach our own little website via 8 hops, same as yahoo.de I should point out that I have no deeper insight into the inner workings of how internet-routing works - maybe this is all expected. But in the past, mtr was quite reliable pin-pointing severe problems. Rainer