SROS Command Line Interface Reference Guide
Tunnel Configuration Command Set
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© Copyright 2007 Hewlett-Packard Development Company, L.P.
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tunnel checksum
Use the
tunnel checksum
command to verify the checksum of incoming Generic Routing Encapsulation
(GRE) packets and to include a checksum on outgoing packets. Use the
no
form of this command to
disable checksum.
Syntax Description
No subcommands.
Default Values
By default,
tunnel checksum
is disabled.
Functional Notes
Both ends of the tunnel must have
tunnel checksum
enabled in order for the tunnel checksum feature to
function. When both endpoints have
tunnel checksum
enabled, a packet with an incorrect checksum will
be dropped. If the endpoints differ in their checksum configuration, all packets will still flow without any
checksum verification.
Usage Examples
The following example enables checksum on the tunnel 1 interface:
ProCurve(config)#
interface tunnel 1
ProCurve(config-tunnel 1)#
tunnel checksum
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When enabled, the
tunnel checksum
will be calculated for each outgoing GRE packet, with the result
stored in the GRE header. The checksum present bit will also be set in the header.