becker@ira.uka.de (Klaus Becker) (03/24/91)
> I'll spare every one the > gory details but I have sun 490 that is acting as a NSF file server to > about 30 sparc stations that is generating Misaligned packets under heavy > load. After all the usual testing one might do this system is on a segment > with it's self and a bridge to the rest of the world. In this configuration > just the file server and the bridge on a ethernet fanout box the sun > generates misaligned packits. Any Ideas???? You will have to reply to my > compuserve account as I can't seem to get return mail. We see a similar behaviour at all kinds of SUNs acting as NFS-Servers. We did some testing and finally managed to produce misaligned packets. It was significant, that the output error rate was low on machines which were only acting as servers, whereas server-machines with additonal user-processes showed high error rates. We took my SLC acting as NFS-Server for two others and watched the error rates (netstat -i 1). Then we produced NFS-Traffic on this machine by copying large files etc. No errors could be seen on the network! Now I moved my mouse in circles in my X-Display, which produced misaligned packets!! It seems to be a general bug in SUNOS with interrupt-handling. So I think the only way to get rid of this misalinged packets is not to allow users or other processes on NFS-Server hosts. Any comments from SUN? Klaus Becker -- +497216083973 -- Becker@ira.uka.DE