Enabling Arp Learning Via Gratuitous Arp; Arp Learning Via Arp Request - Dell S4820T Configuration Manual

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Beginning with Dell Networking OS version 8.3.1.0, when a gratuitous ARP is received, Dell Networking

OS installs an ARP entry on all three CPUs.

Enabling ARP Learning via Gratuitous ARP

To enable ARP learning via gratuitous ARP, use the following command.

Enable ARP learning via gratuitous ARP.

CONFIGURATION mode

arp learn-enable

In Dell Networking OS versions prior to 8.3.1.0, Dell Networking OS learns via ARP requests only if the

target IP specified in the packet matches the IP address of the receiving router interface. This is the case

when a host is attempting to resolve the gateway address.

If the target IP does not match the incoming interface, the packet is dropped. If there is an existing entry

for the requesting host, it is updated.

Figure 47. ARP Learning via ARP Request

Beginning with Dell Networking OS version 8.3.1.0, when you enable ARP learning via gratuitous ARP, the

system installs a new ARP entry, or updates an existing entry for all received ARP requests.

IPv4 Routing

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