3.2 Configuring the IPFE

The IPFE, and then Configuration, and then Options page set up data replication between IPFEs, specify port ranges for TCP traffic, and set application server monitoring parameters.

1. Click IPFE, and then Configuration, and then Options.
   The fields are described in Table 3-1.
2. Under the Inter-IPFE Synchronization section complete the following entries:
   1. Enter the IP addresses for IPFE-A1, IPFE-A2, IPFE-B1, and IPFE-B2 in the corresponding IPFE-Xn IP Address field.

      These are internal addresses used by the IPFEs to replicate association data. These addresses should reside on the IMI network.

   2. Select the State Sync TCP Port used for syncing kernel state between IPFE.
   3. Set the State Sync Reconnect Interval for syncing kernel state between IPFE.
   4. Select the type of Gratuitous ARP Type broadcast to send.
3. Under the Traffic Forwarding section complete the following entries:
   1. If not application servers are available, select how to reject TCP connections in the Application Traffic TCP Reject Option list.
   2. If not application servers are available, select how to reject SCTP connections in the Application Traffic SCTP Reject Option list.
4. Under the Packet Counting section complete the following entries:
   1. Set a value for Imbalance Detection Throughput Minimum.
      The default setting is 20000 and should not be changed from its default unless the IPFE is being tested with a very low load.
   2. Set a value for Least load Threshold.
      This value can be set to a packets-per-second rate below which the Least Load algorithm reverts to round robin.
   3. If you want the support for cluster re-balancing and packet accounting in measurements, select Enabled from the list in the Cluster Rebalancing and Accounting field.
      When this is disabled, all accumulation of packet and byte measurements cease.
5. Under the Application Server Monitoring section complete the following entries:
   1. Set a value for Monitoring Port

      The application server must listen on this port and should send heartbeats.

   2. Set the wait time for a connection to complete when polling the application servers for aliveness in the Monitoring Connection Timeout field
   3. Set the interval for periodically connecting to application servers to test for aliveness in the Monitoring Connection Try Interval field.
   4. If you want to monitor the liveness of application servers, select Heartbeat in the Monitoring Protocol field.
      If any Target Set has load balancing of Least Load, then this setting cannot be changed from Heartbeat due to the need for load information in the monitoring packets.
6. Under the Throttling and DoS protection section complete the following entry:
   1. Set the overload throttling in the Global Packet Rate Limit field.
7. Click Apply or Cancel

For the IPFE to be fully functional, you must assign application servers to a Target Set and associate the Target Set with the IPFE. See Add a Target Set to add a new Target Set.