HP MSR2000/3000/4000 Router Series Layer 3 - IP Services Command Reference

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Examples
# Enable DHCP-REQUEST check for DHCP snooping.
<Sysname> system-view
[Sysname] interface ethernet 1/1
[Sysname-Ethernet1/1] dhcp snooping check request-message
dhcp snooping enable
Use dhcp snooping enable to enable DHCP snooping.
Use undo dhcp snooping enable to disable DHCP snooping.
Syntax
dhcp snooping enable
undo dhcp snooping enable
Default
DHCP snooping is disabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
Use the DHCP snooping function together with trusted port configuration. Before trusted ports are
configured, all ports on the DHCP snooping device are untrusted and the device discards all responses
sent from DHCP servers.
When DHCP snooping is disabled, the device forwards all responses from DHCP servers.
Examples
# Enable DHCP snooping.
<Sysname> system-view
[Sysname] dhcp snooping enable
dhcp snooping information circuit-id
Use dhcp snooping information circuit-id to configure the padding content and code type for the circuit
ID sub-option.
Use undo dhcp snooping information circuit-id to restore the default.
Syntax
dhcp snooping information circuit-id { [ vlan vlan-id ] string circuit-id | { normal | verbose
[ node-identifier { mac | sysname | user-defined node-identifier } ] } [ format { ascii | hex } ] }
undo dhcp snooping information circuit-id [ vlan vlan-id ]
Default
The padding format is normal and the code type is hex.