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Proxy arp – Amer Networks E5Web GUI User Manual

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ARP poll interval

The time in milliseconds between ARP-lookup of hosts. This may be overridden in individual
routes.

Default: 1000

Ping poll interval

The time in milliseconds between sending a Ping to hosts.

Default: 1000

Grace time

The length of time in seconds between startup or reconfigure and monitoring start.

Default: 30

consecutive fails

The number of consecutive failures that occurs before a route is marked as being unavailable.

Default: 5

Consecutive success

The number of consecutive successes that must occur before a route is marked as being
available.

Default: 5

Gratuitous ARP on fail

Send a gratuitous ARP on HA failover to alert hosts of the changes in interface Ethernet and IP
addresses.

Default: Enabled

4.2.6. Proxy ARP

Overview

As discussed previously in Section 3.5, “ARP”, the ARP protocol facilitates a mapping between an
IP address and the MAC address of a host on an Ethernet network.

However, situations may exist where a network running Ethernet is separated into two parts with
a routing device such as a Clavister Security Gateway in between. In such a case, cOS Core itself
can respond to ARP requests directed to the network on the other side of the Clavister Security
Gateway using the feature known as Proxy ARP.

The splitting of an Ethernet network into distinct parts so that traffic between them can be
controlled is a common usage of the proxy ARP feature. cOS Core rule sets can then be used to

Chapter 4: Routing

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