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HP Auto Port Aggregation Administrator's Guide: HP-UX 11i v3 > Chapter 3 Configuring APA

Failover Group Advanced Parameters

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Dead Count

The number of polling packets that are missed before LAN Monitor sends a nettl log message to the user that indicates the link might have problems and the network must be checked. The default is 3.

Polling Interval

The number of microseconds between polling messages. Polling messages are sent between links in the specified interval for monitoring the health of all the links in the link aggregate. Default is 10,000,000 (10 seconds).

Rapid ARP

Enables (on) or disables (off) the ability to transmit gratuitous ARP messages at intervals shorter than 5 seconds. By default, this parameter is on.

By default, when the MAC address of a failover group changes, LAN Monitor transmits one gratuitous ARP packet. Then, it transmits gratuitous ARP packets at a set interval (LM_RAPID_ARP_INTERVAL) for a set number of times (LM_RAPID_ARP_COUNT) to ensure that other clients and servers receive the new IP-MAC address mapping. LAN Monitor then transmits gratuitous ARP packets every 5 seconds until 1 minute has elapsed from the first gratuitous ARP packet.

If you disable this parameter, immediately after the MAC address changes LAN Monitor transmits gratuitous ARP packets every 5 seconds for 1 minute.

Rapid ARP Interval

The number of microseconds between rapid gratuitous ARP messages. The range of valid values is 1000000–4000000, inclusive (1 second to 4 seconds). The default value is 1000000 (1 second). Specify a whole number of seconds because the value you specify is rounded up to the next whole number of seconds. The value must be a valid integer. The rapid ARP interval multiplied by the rapid ARP count must be less than or equal to 60 seconds.

Rapid ARP Count

The number of gratuitous ARP packets sent rapidly. The valid range is 5–60, inclusive. The default value is 10. The value must be a valid integer. The rapid ARP interval multiplied by the rapid ARP count must be less than or equal to 60 seconds.

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