HPE 5920 series

88
Views
System view
Predefined user roles
network-admin
Usage guidelines
Use the DHCP snooping feature 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 mode and padding format 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 mode is normal and the padding format is hex.
Views
Layer 2 Ethernet interface view, Layer 2 aggregate interface view
Predefined user roles
network-admin
Parameters
vlan vlan-id: Specifies a VLAN ID for the Circuit ID sub-option.
string circuit-id: Specifies the string mode, in which the padding content for the Circuit ID sub-option
is a case-sensitive string of 3 to 63 characters.
normal: Specifies the normal mode. The padding content includes the VLAN ID and interface
number.
verbose: Specifies the verbose mode.
node-identifier { mac | sysname | user-defined node-identifier }: Specifies the access node
identifier. The padding content includes the node identifier, Ethernet type (fixed to eth), interface
number, and VLAN ID. The node identifier varies by keyword mac, sysname, and user-defined.
•
mac: Uses the MAC address of the access node as the node identifier. It is the default node
identifier.
•
sysname: Uses the device name as the node identifier. You can set the device name by using
the sysname command in system view. The padding format for the device name is always
ASCII regardless of the specified padding format.