Link Aggregate Advanced Parameters

Load Distribution Algorithm

The algorithm to use for outbound data transfer. Inbound load balancing and data flow distribution are strictly determined by the link partner and have no affect on the outbound algorithm. For a complete description of load balancing, see “Load Balancing”. Check the algorithm you want to use. The following choices are available:

LB_MAC

This algorithm uses the least significant byte of the link level destination MAC address of the data flow as an index into a table of 256 possible entries. The physical port selected will be used to send packets for the duration of the specific data flow.

This is the default algorithm for all link aggregates.

Recommended Configuration: Server-to-Switch

LB_IP

This algorithm uses the least significant bytes of the source and destination IP addresses of the data flow as an index into a table of 256 possible entries.

Recommended Configuration: Server-to-Router

LB_PORT

This algorithm uses the TCP/UDP source and destination port numbers to distribute traffic across the ports in a link aggregate.

Recommended configuration: Server-to-Server

HOT_STANDBY (MANUAL mode only)

This algorithm uses one link in the link aggregate on which to send all outbound traffic; there is no actual load balancing across the network physical ports in the link aggregate. The link is the one with highest port priority. If the link goes down (for example, cable disconnect), all the traffic on the link is automatically switched to a secondary link in the same link aggregate.

If you chose this option, the ports must be cabled to a switch and the switch ports must not be configured for aggregation.

Recommended configuration: Servers that need highly available network interfaces.




	CAUTION: For HP Serviceguard configurations, the member links of an APA Hot Standby link aggregate must be bridged to function properly. If they are not, the node or cluster might go down when a member link fails.

Group Capability

An integer value that determines which network physical ports can be aggregated into a common FEC_AUTO mode link aggregate. The easiest way to create a value is to use the instance number of the link aggregate as the group capability. You must use the same group capability for all ports that you want to join this link aggregate and use the same group capability for the link aggregate.




	TIP: When configuring link aggregates, if more than one FEC_AUTO aggregation is used on the system, each FEC_AUTO aggregation must have a different group capability.

Key

An integer value that determines which network physical ports can be aggregated into a common LACP_AUTO mode link aggregate. The easiest way to create a value is to use the instance number of the link aggregate as the key. You must use the same key value for all of the ports that you want to join this link aggregate and use the same key value for the link aggregate.

Link Aggregate Advanced Parameters

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Load Distribution Algorithm

Group Capability

Key