HP A5120 EI Series User Manual

81
Parameters
vlan vlan-id: Specifies a VLAN ID, in the range 1 to 4094.
circuit-id: Specifies the padding content for the user-defined circuit ID sub-option, a case-sensitive string of
3 to 63 characters.
Description
Use the dhcp-snooping information circuit-id string command to configure the padding content for the
user-defined circuit ID sub-option.
Use the undo dhcp-snooping information circuit-id string command to restore the default.
By default, the padding content for the circuit ID sub-option depends on the padding format of Option
82.
After you configure the padding content for the circuit ID sub-option using this command, ASCII is
adopted as the code type.
If a VLAN is specified, the configured circuit ID sub-option only takes effect within the VLAN; if no VLAN
is specified, the configured circuit ID sub-option takes effect in all VLANs. The former case has a higher
priority. The circuit ID sub-option specified for a VLAN will be padded for packets within the VLAN.
Related commands: dhcp-snooping information format and display dhcp-snooping information.
Examples
# Configure the global padding content for the user-defined circuit ID sub-option as company001.
<Sysname> system-view
[Sysname] interface GigabitEthernet 1/0/1
[Sysname-GigabitEthernet1/0/1] dhcp-snooping information circuit-id string company001
dhcp-snooping information enable
Syntax
dhcp-snooping information enable
undo dhcp-snooping information enable
View
Layer 2 Ethernet interface view, Layer 2 aggregate interface view
Default level
2: System level
Parameters
None
Description
Use the dhcp-snooping information enable command to configure DHCP snooping to support Option 82.
Use the undo dhcp-snooping information enable command to disable this function.
By default, DHCP snooping does not support Option 82.
Related commands: display dhcp-snooping information.
Examples
# Configure DHCP snooping to support Option 82.

HP A5120 EI Series Specifications

General

Uplink Ports	4 x SFP
Stacking	No
Management	CLI, Web, SNMP
Routing Protocols	RIP, OSPF
Power Supply	AC
MAC Address Table Size	16K
Dimensions	440 x 430 x 44 mm
Operating Temperature	0°C to 45°C
Operating Humidity	10% to 90% non-condensing
Model	HP A5120-24G EI Switch (JG234A)
VLANs	4094

Summary

Gratuitous ARP configuration commands

gratuitous-arp-learning enable

Enables learning of gratuitous ARP packets.

gratuitous-arp-sending enable

Enables switch to send gratuitous ARP packets upon receiving requests.

IP addressing configuration commands

display ip interface

Displays IP configuration information for a Layer 3 interface.

ip address

Assigns an IP address and mask to an interface.

DHCP server configuration commands

dhcp enable

Enables the DHCP server.

dhcp server ip-pool

Creates a DHCP address pool and enters its view.

display dhcp server statistics

Displays the statistics of the DHCP server.

DHCP snooping configuration commands

dhcp-snooping

Enables DHCP snooping.

display dhcp-snooping trust

Displays information about trusted ports.

IPv4 DNS configuration commands

display dns server

Displays the IPv4 DNS server information.

dns server

Specifies a DNS server.

IP performance optimization configuration commands

display fib

Displays FIB entries.

display ip statistics

Displays statistics of IP packets.

IPv6 basics configuration commands

display ipv6 interface

Displays the IPv6 information of an interface.

ipv6 address

Configures an IPv6 global unicast address for an interface.

DHCPv6 configuration commands

display ipv6 dhcp pool

Displays DHCPv6 address pool information.

ipv6 dhcp server enable

Enables the DHCPv6 server.

DHCPv6 relay agent configuration commands

display ipv6 dhcp relay server-address

Displays information about DHCPv6 server addresses on the relay agent.

ipv6 dhcp relay server-address

Enables DHCPv6 relay agent and specifies a DHCPv6 server.

DHCPv6 client configuration commands

display ipv6 dhcp client

Displays DHCPv6 client information.

DHCPv6 snooping configuration commands

ipv6 dhcp snooping enable

Enables DHCPv6 snooping globally.

ipv6 dhcp snooping trust

Configures a DHCPv6 trusted port.