Network Monitor - TCP: Checksum = ERROR

hi,
getting the following errors on my server when i capture data using win2k
built-in network monitoring tool...

capture data, open captur log file, open packet, then scroll down and expand
TCP tree in middle window pane..

i then get the following errors....
TCP: Checksum = ERROR: CheckSum is 0x6D8D, Should be 0xA6E1

this appears on every tcp packet being sent...

is this a bug/config problem withing network monitoring tool?

thusfar i have this tool installed on 3 servers and getting the errors on
all of them..

running win2k with latest service packs.

any ideas?

thanks in advance.

 

Are you capturing on the computer sending the packets? If so, probably TCP
Checksum Offload is enabled. You can check in your network connection
properties.

Captures take their data from NDIS, which is before any offload checksum
computations take place. You can also verify by running the capture program
on another computer, filtering for packets sent from the original server.
You should see correct packets in this case.