Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 341

Configurable ARP Retries In FTOS versions prior to 8.3.1.0 the number of ARP retries is set to 5 and is not configurable. After 5 retries, FTOS backs off for 20 seconds before it sends a new request. Beginning with FTOS version 8.3.1.0, the number of ARP retries is configurable. The backoff interval remains at 20 seconds. Task Set the number of ARP retries. Display all ARP entries learned via gratuitous ARP. Command Syntax arp retries number Default: 5 Range: 5-20 show arp retries Command Mode CONFIGURATION EXEC Privilege ICMP For diagnostics, Internet Control Message Protocol (ICMP) provide 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 Task List for ICMP Use the following steps to configure ICMP: • Enable ICMP unreachable messages on page 341 • Enable ICMP redirects on page 342 See the for a complete listing of all commands related to ICMP. Enable ICMP unreachable messages By default, ICMP unreachable messages are disabled. When enabled ICMP unreachable messages are created and sent out all interfaces. To disable ICMP unreachable messages, use the no ip unreachable command. To reenable the creation of ICMP unreachable messages on the interface, use the following command in the INTERFACE mode: Command Syntax ip unreachable Command Mode Purpose INTERFACE Set FTOS to create and send ICMP unreachable messages on the interface. IPv4 Addressing | 341