When frames are transmitted on a trunk, they are distributed across the working member links. The distribution function ensures that the frames belonging to a particular conversation are neither mis-ordered nor duplicated at the receiving end.
The BIG-IP® system distributes frames by calculating a hash value based on
the source and destination addresses (or the destination address only) carried in the frame, and
associating the hash value with a link. All frames with a particular hash value are transmitted
on the same link, thereby maintaining frame order. Thus, the system uses the resulting hash to
determine which interface to use for forwarding traffic.
Frame Distribution Hash
setting specifies the basis for the hash
that the system uses as the frame distribution algorithm.
The default value is Source/Destination IP address.
Possible values for this setting are:
Source/Destination MAC address
This value specifies that the system bases the hash on the combined MAC addresses of the source and the destination.
Destination MAC address
This value specifies that the system bases the hash on the MAC address of the destination.
Source/Destination IP address
This value specifies that the system bases the hash on the combined IP addresses of the source and the destination.