ARP

The Address Resolution Protocol (ARP) allows a host to find the physical address of a target host on the same physical network using only the target's IP address. ARP is a low-level protocol that hides the underlying network physical addressing and permits assignment of an arbitrary IP address to every machine. ARP is considered part of the physical network system and not as part of the Internet protocols.

Configuring ARP - Gaia Portal

To show dynamic ARP entries:

1. In the navigation tree, click Network Management > ARP.
2. In the upper right corner, click the Monitoring tab.

To show static ARP entries:

1. In the navigation tree, click Network Management > ARP.
2. In the upper right corner, click the Configuration tab.

To change static and dynamic ARP parameters:

1. In the navigation tree, click Network Management > ARP.
2. In the upper right corner, click the Configuration tab.
3. In the ARP Table Settings section:
   1. Enter the Maximum Entries. This is the maximal number of entries in the ARP cache.

      Range: 1024 - 16384 entries

      Default: 4096 entries

      Note - Make sure to configure a value large enough to accommodate at least 100 dynamic entries, in addition to the maximum number of static entries.

   2. Enter the Validity Timeout. This is the time, in seconds, to keep resolved dynamic ARP entries. If the entry is not referred to and is not used by traffic before the time elapses, it is deleted. Otherwise, a request will be sent to verify the MAC address.

      Range: 60 - 86400 seconds (24 hours)

      Default: 60 seconds

To add a static ARP entry:

1. In the navigation tree, click Network Management > ARP.
2. In the upper right corner, click the Configuration tab.
3. In the Static ARP Entries section, click Add.
4. Enter the IP Address of the static ARP entry and the MAC Address used when forwarding packets to the IP address.
5. Click OK.

To delete a static ARP entry:

1. In the navigation tree, click Network Management > ARP.
2. In the upper right corner, click the Configuration tab.
3. In the Static ARP Entries section, select a Static ARP entry.
4. Click Remove.

To flush all dynamic ARP entries:

1. In the navigation tree, click Network Management > ARP.
2. In the upper right corner, click the Monitoring tab.
3. Click Flush All.

Configuring ARP - Gaia Clish

Description

Commands to configure the Address Resolution Protocol (ARP).

Syntax

• To show dynamic and static ARP entries:

  show arp dynamic all static all

• To add a static ARP entry:

  add arp static ipv4-address <IPv4 Address> macaddress <MAC Address>

• To delete dynamic and static ARP entries:

  delete arp dynamic all static ipv4-address <IPv4 Address>

• To configure ARP parameters:

  set arp table validity-timeout <Time in sec> cache-size <Number of ARP entries>

• To show ARP parameters:

  show arp table validity-timeout cache-size

Important - After you add, configure, or delete features, run the save config command to save the settings permanently.

Parameters

Parameter	Description
ipv4-address <IPv4 Address>	Configures the IPv4 Address of the static ARP entry. Range: Dotted-quad ([0-255].[0-255].[0-255].[0-255]). Default: No default value
macaddress <MAC Address>	Configures the hardware address (six hexadecimal octets separated by colons) of the static ARP entry. Range: 00:00:00:00:00:00 - FF:FF:FF:FF:FF:FF Default: No default value
validity-timeout <Time in sec>	Configures the time, in seconds, to keep resolved dynamic ARP entries in the ARP cache table. If the ARP entry is not referred to and is not used by traffic before the time elapses, it is deleted. Otherwise, Gaia sends an ARP Request to verify the MAC address. Range: 60 - 86400 seconds (24 hours) Default: 60 seconds
cache-size <Number of ARP entries>	Configures the maximal number of ARP entries in the ARP cache table. Range: 1024 - 16384 Default: 4096 Note – Make sure to configure a value large enough to accommodate at least 100 dynamic entries, in addition to the maximum number of static entries.