R211x-HP Flexfabric 11900 Layer 3 - IP Services Command Reference

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• If the server returns a DHCP-ACK message or does not return any message within a specific interval,
the DHCP relay agent removes the entry and sends a DHCP-RELEASE message to the DHCP server
to release the IP address.
• If the server returns a DHCP-NAK message, the relay agent keeps the entry.
With this feature disabled, the DHCP relay agent does not remove relay entries automatically. After a
DHCP client releases its IP address, you must use the reset dhcp relay client-information on the relay
agent to remove the corresponding relay entry.
Examples
# Disable periodic refresh of relay entries.
<Sysname> system-view
[Sysname] undo dhcp relay client-information refresh enable
Related commands
• dhcp relay client-information record
• dhcp relay client-information refresh
• reset dhcp relay client-information
dhcp relay information circuit-id
Use dhcp relay information circuit-id to configure the padding content and padding format for the circuit
ID sub-option of Option 82.
Use undo dhcp relay information circuit-id to restore the default.
Syntax
dhcp relay information circuit-id { string circuit-id | { normal | verbose [ node-identifier { mac | sysname
| user-defined node-identifier } ] } [ format { ascii | hex } ] }
undo dhcp relay information circuit-id
Default
The content mode is normal and the padding format is hex.
Views
Interface view
Predefined user roles
network-admin
mdc-admin
Parameters
string circuit-id: Specifies a case-sensitive string of 3 to 63 characters as the content of the circuit ID
sub-option.
normal: Specifies the normal mode, in which the padding content consists of the VLAN ID and port
number.
verbose: Specifies the verbose mode. The padding content includes the VLAN ID and interface number.
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), chassis number, slot number,