On November 13, 2003 03:36 am, Enrico Payne wrote: > Hi, > > I am running RH8 (Std ISO install) on 3 servers (kernel 2.4.18-14), and > have noticed a strange thing over the last few days. > > Sometimes the client pc's (Windoze) or the servers for that matter may not > be able to ping the one server. However if I do a traceroute, it knows > about it, as I get !H messages on the traceroute. > > If I check the arp table (arp -a), I can see the server I am trying to > ping, but it has an incomplete address. > If I manually add the server to the arp table (arp -s), then all is well. > What is strange is the fact that all the machines are on the same subnet > and other machines can ping the server no problem. Any amount of rebooting > does not seem to resolve the problem. This seems to be happening at random. > > I have also noticed an error on the server consoles "Neighbour table > overflow". Does this perhaps have something to do with it? > > Does anyone know what could be causing the ARP weirdness, and what is > causing the Neighbour table overflow error? > > Regards > Enrico Payne not sure on why this is intermittent, but !H is Host Unreachable. So is it just geting resolution from a local host file and failing to access the network? -can you clearify the situation a bit (you say "it knows about it" hmmm) -what exactly is in the incomplete entry of arp table? One thought, that may be unrelated, is that despite the way a switch should work (send out all other ports if unknown), I have seen situation where you had to "ping out" from a new machine to get it in the switches mac table, this is often the case when you move a box from one port to another, as the switches mac tables are wrong until it flushes the old info. Do you have anything like that that may be causing problems? -- Pete Nesbitt, rhce -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
