arp static

Use arp static to configure a static ARP entry.

Use undo arp to delete an ARP entry.

Syntax

arp static ip-address mac-address [ vlan-id interface-type interface-number | vsi-interface vsi-interface-id tunnel number vsi vsi-name | vsi-interface vsi-interface-id interface-type interface-number service-instance instance-id vsi vsi-name ] [ vpn-instance vpn-instance-name ]

undo arp ip-address [ vpn-instance-name ]

Default

No static ARP entries exist.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

ip-address: Specifies an IP address for the static ARP entry.

mac-address: Specifies a MAC address for the static ARP entry, in the format of H-H-H.

vlan-id: Specifies the ID of a VLAN to which the static ARP entry belongs. The value range is 1 to 4094.

interface-type interface-number: Specifies an interface by its type and number.

vsi-interface vsi-interface-id: Specifies a VSI interface by its number. The VSI interface must already exist.

tunnel number: Specifies a tunnel interface by its number. The tunnel interface must already exist.

vsi vsi-name: Specifies a VSI by its name, a case-sensitive string of 1 to 31 characters.

service-instance instance-id: Specifies an Ethernet service instance by its ID in the range of 1 to 4096. You must specify this option if you specify a Layer 2 Ethernet interface for the preceding interface-type interface-number arguments. Do not specify this option if you specify an interface of other types for the preceding interface-type interface-number argument.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance to which the static ARP entry belongs. The vpn-instance-name argument represents the VPN instance name, a case-sensitive string of 1 to 31 characters. The VPN instance must already exist. To specify a static ARP entry on the public network, do not specify this option.

Usage guidelines

A static ARP entry is manually configured and maintained. It does not age out and cannot be overwritten by any dynamic ARP entry.

Static ARP entries can be short or long.

A resolved short static ARP entry becomes unresolved upon certain events, for example, when the resolved output interface goes down, or the corresponding VLAN or VLAN interface is deleted.

Long static ARP entries are effective or ineffective. Ineffective long static ARP entries cannot be used for packet forwarding. A long static ARP entry is ineffective when any of the following conditions exists:

The corresponding VLAN interface or output interface is down.
The IP address in the entry conflicts with a local IP address.
No local interface has an IP address in the same subnet as the IP address in the ARP entry.

If you specify the vlan-id interface-type interface-number argument, follow these restrictions and guidelines:

The interface can be an Ethernet interface or an aggregate interface.
The VLAN and VLAN interface must already exist. The specified Ethernet interface must belong to the specified VLAN.
The IP address of the VLAN interface and the IP address specified by the ip-address argument must be on the same network.
A long static ARP entry in a VLAN is deleted if the VLAN or VLAN interface is deleted.

On a VXLAN IP gateway that forwards traffic among VXLANs through VXLAN tunnels, a VSI interface can act as the gateway for multiple VXLANs. The VSI interface (input interface) might be connected to multiple VXLAN tunnel interfaces (output interfaces). In this case, you must specify the vsi-interface vsi-interface-id tunnel number vsi vsi-name parameters to identify a VSI interface-VSI-VXLAN tunnel interface binding. For more information about VSI interfaces, VSI, and VXLAN tunnel interfaces, see VXLAN Configuration Guide.

On a VXLAN IP gateway that forwards traffic from multiple local sites to remote sites, a VSI interface can act as the gateway for multiple local sites. The VSI interface (input interface) might be associated with multiple Ethernet services (output interfaces) on Layer 2 Ethernet interfaces through which the VSI interface connects to the local sites. In this case, you must specify the vsi-interface vsi-interface-id interface-type interface-number service-instance instance-id vsi vsi-name parameters to identify a VSI interface-Layer 2 Ethernet interface-Ethernet service instance-VSI binding. For more information about VSI interfaces, VSI, and Ethernet service instances, see VXLAN Configuration Guide.

Examples

# Configure a long static ARP entry that contains IP address 202.38.10.2, MAC address 00e0-fc01-0000, and output interface in VLAN 10.

<Sysname> system-view
[Sysname] arp static 202.38.10.2 00e0-fc01-0000 10

# Configure a long static ARP entry that contains IP address 1.1.1.1, MAC address 00e0-fc01-0000, input interface VSI-interface 1, output interface Tunnel 1, and the VSI a.

<Sysname> system-view
[Sysname] arp static 1.1.1.1 00e0-fc01-0000 vsi-interface 1 tunnel 1 vsi a

# Configure a long static ARP entry that contains IP address 1.1.1.1, MAC address 00e0-fc01-0000, input interface VSI-interface 1, output interface Ethernet instance 1 on GigabitEthernet 1/0/1, and VSI a.

<Sysname> system-view
[Sysname] arp static 1.1.1.1 00e0-fc01-0000 vsi-interface 1 gigabitethernet 1/0/1 service-in
stance 1 vsi a

Related commands

display arp

reset arp

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