EtherChannel load-balancing options
There are two load balancing methods for outgoing traffic in EtherChannel, as follows: round-robin, which spreads the outgoing traffic evenly across all of the adapters in the EtherChannel; and standard, which selects the adapter using an algorithm.
The Hash Mode parameter determines the numerical value that is fed to the algorithm.
The following table summarizes the valid load-balancing option combinations offered.
|Mode||Hash Mode||Outgoing Traffic Distribution|
|standard or 8023ad||default||The traditional AIX® behavior. The adapter selection algorithm uses the last byte of the destination IP address (for TCP/IP traffic) or MAC address (for ARP and other non-IP traffic). This mode is typically a good initial choice for a server with a large number of clients.|
|standard or 8023ad||src_dst_port||The outgoing adapter path is selected by an algorithm using the combined source and destination TCP or UDP port values. Because each connection has a unique TCP or UDP port, the three port-based hash modes provide additional adapter distribution flexibility when there are several, separate TCP or UDP connections between an IP address pair.|
|standard or 8023ad||src_port||The adapter selection algorithm uses the source TCP
or UDP port value. In the netstat -an command output, the
port is the TCP/IP address suffix value in the
|standard or 8023ad||dst_port||The outgoing adapter path is selected by the algorithm
using the destination system port value. In the netstat -an command
output, the TCP/IP address suffix in the
|round-robin||default||Outgoing traffic is spread evenly across all of the adapter ports in the EtherChannel. This mode is the typical choice for two hosts connected back-to-back (without an intervening switch).|