HP A5120 EI Series User Manual

9
View
System view
Default level
2: System level
Parameters
None
Description
Use the gratuitous-arp-sending enable command to enable a switch to send gratuitous ARP packets when
receiving ARP requests from another network segment.
Use the undo gratuitous-arp-sending enable command to restore the default.
By default, a switch cannot send gratuitous ARP packets when receiving ARP requests from another
network segment.
Examples
# Disable a switch from sending gratuitous ARP packets.
<Sysname> system-view
[Sysname] undo gratuitous-arp-sending enable
gratuitous-arp-learning enable
Syntax
gratuitous-arp-learning enable
undo gratuitous-arp-learning enable
View
System view
Default level
2: System level
Parameters
None
Description
Use the gratuitous-arp-learning enable command to enable the gratuitous ARP packet learning function.
Use the undo gratuitous-arp-learning enable command to disable the function.
By default, the function is enabled.
With this function enabled, a switch receiving a gratuitous ARP packet can add the source IP and MAC
addresses carried in the packet to its own dynamic ARP table if it finds that no ARP entry exists in the
cache corresponding to the source IP address of the ARP packet. If the corresponding ARP entry exists in
the cache, the switch updates the ARP entry regardless of whether this function is enabled.
Examples
# Enable the gratuitous ARP packet learning function.
<Sysname> system-view
[Sysname] gratuitous-arp-learning enable

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.