Are you staying on the 6500, or are you routing outside of the backplane? If you are routing outside of the backplane, does the link support that large of a frame, or are you fragmenting?
Fragmentation tends to play hob with certain applications (don't know about Linux NFS v2, sorry). Any reason why you NEED that large of a frame?
--Jonathan
Jonathan Feldman
Chief Technical Manager, Chatham County ICS http://chathamcounty.org
Contributing Editor, Network Computing http://nwc.com
"Teach Yourself Network Troubleshooting"
"Network+ Exam Guide" http://feldman.org
>>> "Neil C. Bright" <ncb at cc.gatech.edu> 11/02 12:55 PM >>>
Anybody out there have experience with gigabit ethernet cards running with
jumbo frames (>9000 MTU). I seem to be having problems talking NFS (as a
client) when I do such.
Pings (even large ones) go through, and some NFS traffic does as well. Within
a short amount of time, it'll loose contact with the NFS server and processes
waiting on that I/O will get into a non-blockable wait.
stats:
Intel Pro/1000 gigabit ethernet
Cisco catalyst 6506
redhat's 2.2.16-3 kernel
+============ E3 75 6D 3F D8 CF B5 C7 79 D3 44 11 DE 08 9C 85 ============+
Neil Bright ncb at cc.gatech.edu IHPCL / CNS System Administrator
(404) 385-0448 College of Computing
http://www.cc.gatech.edu/projects/ihpcl Georgia Institute of Technology
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