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HELP! sniffing experts

J

jonnyfin

Golden Member
situation: i've got 5 people in an aisle who are having problems with nfs mounts. they will either be able to mount, or wont, or be intermittenent.

these folks are using rh7 & w2k pro. and are trying to run nfs mounts via hummingbird maestro to a unix server, or straight linux nfs to a linux server.

I think the culprit is udp packets are being dropped on the line back to the switch, but I had networking sniff a port and they saw nothing unusual. i'm just a lowly desktop support with an mcse and ccna, but i'm pretty sure i'm right

any insight would be appreciated.

-jon
 
hmm, so only NFS is having trouble to these unix servers? generally points to some kind of host configuration error or rights. Layer2 switches don't care if the frame is udp or tcp or ipx or appletalk or whatever (I thought NFS is strictly TCP anyway?). can you get rid of the rc7 and just use hummingbird to do the mounts?

if you want you can e-mail me a trace file of a successful and failed mount. If "networking" did indeed do a trace they will see the success or failure of the mount and be able to tell you exactly why it isn't working.
 


<< hmm, so only NFS is having trouble to these unix servers? generally points to some kind of host configuration error or rights. Layer2 switches don't care if the frame is udp or tcp or ipx or appletalk or whatever (I thought NFS is strictly TCP anyway?). can you get rid of the rc7 and just use hummingbird to do the mounts?

if you want you can e-mail me a trace file of a successful and failed mount. If "networking" did indeed do a trace they will see the success or failure of the mount and be able to tell you exactly why it isn't working. >>



NFS is udp. Its quicker that way, although I think it can be setup to use tcp.

Both the linux machines and the win2k machines are having troubles? Randomly? Ethernet I guess... Does anyone else in the office mount these NFS shares? If so, does anyone else have trouble? Did you check the cables? No one is plugging the coffee machine into the server's ethernet port at these times right? How is the server doing? High load? Disk thrashing?
 


<< thanks for the info on NFS monkey! >>



Thats about all I know. Ive got an oreilly book on it around here somewhere, but with all of the security threats, I havent looked into it too much.
 
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