NiftyClusters Mitch wrote: > Good list: > Also add multiple runs of "traceroute" and also try ping, ping -f , > ping -A and ping -R. See also ping6 > If routes are dynamic we have one answer to the problem, I would > expect traceroute to have 'one' answer on a simple net. > If packets are falling on the floor then we need to know why. > > The different invocations of ping can tell you if packets drop at slow > or fast transfer rates. > ping -R is slightly different than traceroute but if the return routes > flip one way then the > other we should know why. > > Watch out for /etc/sysconfig/network-scripts/ifcfg* where hardware addresses, > subnet masks, device driver links/ names etc. no longer match the hardware > when things move. > More, watch out for /etc/sysconfig/networking/devices where configs that you thought you deleted live on to get you when your run system-config-network. I just could not figure out, for a while, why when I deleted /etc/sysconfig/network-scripts/ifcfg-eth1.bak it would be right back there! > Consider snooping packets on the link to see if all is as you expect. I keep an > old, slow network hub (not a switching hub) for the times when I want > to see the bits on the wire and > not the bits that the local driver is able to show me. I have one as well. It is so hard to find them anymore....