R211x-HP Flexfabric 11900 MPLS Command Reference

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control-word enable
Use control-word enable to enable the control word function.
Use undo control-word enable to restore the default.
Syntax
control-word enable
undo control-word enable
Default
Control word is disabled.
Views
PW class view
Predefined user roles
network-admin
mdc-admin
Usage guidelines
The control word field is between the MPLS label stack and the Layer 2 data. It carries extra control
information about the Layer 2 frame, such as the sequence number. The control word field has the
following functions:
• Avoid packet disorder. In case of multi-path forwarding, packets received might be disordered. You
can configure the control word function on the device, so the device can reorder the packets
according to the sequence number carried in the control word field.
• Identifies the original payload length for packets that include padding.
This command enables the control word function on the local PE. Whether packets carry the control word
filed or not is determined by the configuration on both the local and remote PEs of a PW. Packets carry
the control word field only when control word is enabled on both the PEs.
Examples
# Enable control word for PW class pw100.
<Sysname> system-view
[Sysname] pw-class pw100
[Sysname-pw-pw100] control-word enable
Related commands
display l2vpn pw-class
default-pw-id
Use default-pw-id to configure the default PW ID for a VSI.
Use undo default-pw-id to delete the default PW ID for a VSI.
Syntax
default-pw-id default-pw-id
undo default-pw-id