2009/3/21 Scott Silva <ssilva at sgvwater.com>: > <snip> >> When I run the command "mtr -c 10 -r centos.org" I continue to see the >> line which includes "???" and "100% loss" within the Layered Tech DC >> in Dallas. I don't know what if anything that indicates. At the time >> of the below test, I can load centos.org into my browser, without >> problems. >> >> pod22c_ae.layeredtech.com 0.0% 120.8 136.4 118.6 201.5 26.3 >> ??? 100.0 0.0 0.0 0.0 0.0 0.0 >> 162.194.232.72.static.reverse.ltdomains.com 10.0% 148.6 133.1 119.7 161.0 18.0 >> [root at dell2400 ~]# > > Not all routers respond to the icmp packets in these tests. The fact that the > trace gets beyond that router is usually enough to imply that the packets get > through. I also see the 100% loss at that router, but have no problem with the > centos site. > > Sometimes routers are configured to ignore tests like this all the time, and > sometimes they will drop any unnecessary test packets if they are running near > their maximum load. The tests are not a go / no go test. Scott: Thank you for the explanation! I've been able to get to the centos.org web site today, without any problems, at various times during the day. Never had problems with it before, until this week. Lanny