Network to Media Resolution (ARP & NDP)

IPv4 network use Address Resolution Protocol (ARP) to resolve IP address to MAC address.

arp

	arp <ip-address> <mac-address> no arp <ip-address> <mac-address> Sets a static ARP entry. The no form of the command deletes the static ARP.
Syntax Description	ip-address	IPv4 address
	mac-address	MAC address
Default	N/A
Configuration Mode	config
History	1.5
Example	`ufmapl [ mgmt-sa ] (config) # arp 172.30.0.1 00:00:5E:00:01:01`
Related Commands	show ip arp
Notes

show arp

	show arp [static] Displays the ARP table.
Syntax Description	N/A
Default	N/A
Configuration Mode	Any configuration mode
History	1.5
Example	`ufmapl [ mgmt-sa ] (config) # show arp ARP cache contents IP 172.30.0.1 maps to MAC 00:00:5E:00:01:01 (interface eth0) ufmapl [ mgmt-sa ] (config) # show arp static Static ARP entries IP 1.1.1.1 maps to MAC 00:01:02:03:04:05`
Related Commands	arp
Notes

ipv6 neighbor

	ipv6 neighbor <ipv6-address> <ifname> <mac-address> no ipv6 neighbor <ipv6-address> <ifname> <mac-address> Adds a static neighbor entry. The no form of the command deletes the static entry.
Syntax Description	ipv6-address	IPv6 address
	ifname	Management interface (i.e. eth0, eth1)
	mac-address	MAC address
Default	N/A
Configuration Mode	config
History	4.1.0
Example	`ufmapl [ mgmt-sa ] (config) # ipv6 neighbor 2001:db8:701f::8f9 eth0 00:11:22:33:44:55`
Related Commands	show ipv6 neighbor ipv6 route arp clear ipv6 neighbors
Notes	ARP is used only with IPv4. In IPv6 networks, Neighbor Discovery Protocol (NDP) is used similarly. Use The no form of the command to remove static entries. Dynamic entries can be cleared via the “clear ipv6 neighbors” command.

clear ipv6 neighbors

	clear ipv6 neighbors Clears the dynamic neighbors cache.
Syntax Description	N/A
Default	N/A
Configuration Mode	config
History	4.1.0
Example	`ufmapl [ mgmt-sa ] (config) # clear ipv6 neighbors`
Related Commands	ipv6 neighbor show ipv6 neighbor arp
Notes	Clearing Neighbor Discovery Protocol (NDP) cache removes only the dynamic entries learned and not the static entries configured Use the no form of the command to remove static entries

show ipv6 neighbors

	show ipv6 neighbors [static] Displays the Neighbor Discovery Protocol (NDP) table.
Syntax Description	static	Filters only the table of the static entries
Default	N/A
Configuration Mode	Any configuration mode
History	4.1.0
Example	`ufmapl [ mgmt-sa ] (config) # show ipv6 neighbors IPv6 Address Age MAC Address State Interf ------------------------------------- ----- ----------------- ---------- ------ 2001::2 9428 AA:AA:AA:AA:AA:AA permanent eth0`
Related Commands	ipv6 neighbor clear ipv6 neighbor show ipv6
Notes

Last updated: August 22, 2020