Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 559

Configuring ARP Retries The number of ARP retries is user-configurable. The default backoff interval remains at 20 seconds. To set and display ARP retries, use the following commands. • 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. For information about the arp backoff-time command, see Configuring the Timer for Resending Unresolved ARPs. • 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. Configuration Tasks for ICMP The following lists the configuration tasks for ICMP. • Enabling ICMP Unreachable Messages IPv4 Routing 559