Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 2 GRE Configuration Commands
3Com Corporation
2-4
Field Description
key
Identification keyword of the tunnel
interface, which is not specified here.
Checksumming of packets
End-to-end check of the tunnel, being
disabled here.
5 minutes input rate
Input rate in seconds within the last 5
minutes
packets/sec
Input packet number in seconds within
the last 5 minutes
packets input Total input packet number
bytes Total input byte number
input error
Number of error packets among all input
packets.
output error
Number of error packets among all
output packets.
2.1.4 gre checksum
Syntax
gre checksum
undo gre checksum
view
Tunnel interface view
Parameter
None
Description
Use the gre checksum command to configure the two ends of a tunnel to perform
end-to-end check, verifying the correctness of packets and discard those that do not
pass the verification.
Use the undo gre checksum command to cancel the check.
By default, end-to-end check of the two ends of tunnel is disabled.
You may enable or disable checksum at each end of a tunnel as needed. If checksum is
enabled at the local end but not at the opposite end, the local end will perform
checksum on the transmitted packets but not on the received packets. If checksum is
disabled at the local end but enabled at the opposite end, the local end will perform do
the opposite.