Icmp; Configuration Tasks For Icmp; Enabling Icmp Unreachable Messages - Dell S6000–ON Configuration Manual

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Set the number of ARP retries.

CONFIGURATION mode

arp retries number

The default is 5.

The range is from 1 to 20.

Set the exponential timer for resending unresolved ARPs.

CONFIGURATION mode

arp backoff-time

The default is 30.

The range is from 1 to 3600.

Display all ARP entries learned via gratuitous ARP.

EXEC Privilege mode

show arp retries

ICMP

For diagnostics, the internet control message protocol (ICMP) provides routing information to end

stations by choosing the best route (ICMP redirect messages) or determining if a router is reachable

(ICMP Echo or Echo Reply).

ICMP error messages inform the router of problems in a particular packet. These messages are sent only

on unicast traffic.

The following lists the configuration tasks for ICMP.

For a complete listing of all commands related to ICMP, refer to the Dell Networking OS Command Line

Reference Guide.

Enabling ICMP Unreachable Messages

By default, ICMP unreachable messages are disabled.

When enabled, ICMP unreachable messages are created and sent out all interfaces.

To disable and re-enable ICMP unreachable messages, use the following commands.

To disable ICMP unreachable messages.

INTERFACE mode

no ip unreachable

Set Dell Networking OS to create and send ICMP unreachable messages on the interface.

INTERFACE mode

IPv4 Routing