Hi Bill,
I don't know what to say about the missing community name, and if you
suspect that is the case, then a PMR is certainly in order.
But the issue of bad upd checksums may be a red herring. I've seen this
issue before, using traces from Ethereal, and I specifically found this
on a site discussing issues in RedHat 3:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=132781
Comment #8 From Martin Hunt
on 2005-04-21 13:01 EST
tcpdump complaining about bad checksums is actually normal behavior on
a machine that is offloading checksum calculation to the ethernet card.
tcpdump is grabbing the packets before they hit the ethernet card, so
the checksum hasn't been computed.
To check if your card is offloading checksum calculations, do
# /sbin/ethtool -k eth0
Offload parameters for eth0:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp segmentation offload: off
You can temporarily disable tx checksums and try again. The bad
chksum messages should disappear.
# /sbin/ethtool -K eth0 tx off
HTH,
James Shanks
Level 3 Support for Tivoli NetView for UNIX and Windows
Tivoli Software / IBM Software Group
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