When DHCP snooping unicast packets are forwarded using CPU, the EXP values of MPLS packets sent to the tunnel side are mapped to the DSCP values (equal to the EXP values) of IP packets. After CPU forwarding is disabled for DHCP snooping unicast packets, DHCP snooping unicast packets are forwarded using hardware. The EXP values of MPLS packets sent to the tunnel side are mapped to the DSCP values (6 by default) of IP packets based on the DSCP-EXP mappings specified using the host-packet dscp map command.
Run system-view
The system view is displayed.
Run dhcp enable
DHCP is enabled globally.
DHCP snooping is enabled.
Run dhcp snooping unicast cpu-forward disable
Hardware forwarding is configured for DHCP snooping unicast packets.
Run commit
The configuration is committed.