Allied Telesis X900-48FE, AT-8900 Enable ip macdisparity, Reset ip counter, Set ip arpwaittimeout

Software Version 2.8.1 73

enable ip macdisparity

Syntax ENAble IP MACdisparity

Description This new command allows you to add static ARP entries with multicast MAC addresses, and allows packets with conflicting IP and MAC addresses to pass through the router or switch. Normally these packets are discarded as being invalid by the router or switch.

Conflicting IP and MAC addresses include:

■A multicast IP address with a unicast MAC address

■A unicast IP address with a multicast MAC address

This feature is disabled by default. When disabled, you can only add ARP entries with unicast MAC addresses, and the router or switch discards packets with conflicting IP and MAC addresses.

Switches further downstream may not accept unicast IP addresses with multicast MAC addresses.

Example To allow static entries with multicast MAC addresses to be configured on the router or switch, use the command:

ena ip mac

reset ip counter

Syntax RESET IP COUnter={ALLARPCACheICmpINTerfaceIPMULticastROUt eSNmpUDP}

Description This command sets IP counters to zero. The counter parameter specifies particular counters depending on the option, and all resets all of them. You can now specify cache as an option for the counter parameter.

Example To reset the IP route counters to zero, use the command:

reset ip cou=rou

set ip arpwaittimeout

Syntax SET IP ARPWaittimeout=1..30

Description This new command sets the amount of time the router or switch waits for a response after it sends an ARP request message.

The easiest way to test a changed wait timeout period is to ping an unavailable device. The timeout determines the delay between pinging an IP address and receiving the reply that the device is unreachable.

The arpwaittimeout parameter specifies the number of seconds that the router or switch waits for a response to an ARP request message. If it does not receive a reply after that number of seconds, it notifies the sending device that the

Software Version 2.8.1 C613-10477-00 REV B