A popular way of load balancing is creating eth-trunk interfaces, but many times this is done without considering this little fact, when adding interfaces to the eth-trunk it is important to remember that if the number is the nth power of 2, the load balance will be more even. Here is a simple and effective way to check if the eth-trunk contains an nth power of 2 number of interfaces.

Checking Whether the Number of Member Interfaces is the nth Power of 2

Procedure

<HUAWEI> display eth-trunk 1 verbose

Eth-Trunk1's state information is:

Local:

LAG ID: 1                   WorkingMode: LACP

Preempt Delay Time: 1       Hash arithmetic: According to SIP-XOR-DIP

System Priority: 32768      System ID: 0018-82d4-04c3

Least Active-linknumber: 1  Max Active-linknumber: 2

Operate status: up          Number Of Up Port In Trunk: 2

--------------------------------------------------------------------------------

ActorPortName                     Status       PortType     PortPri PortNo PortKey PortState Weight

GigabitEthernet0/0/2           Selected   1GE          10          262      2609    10111100   1

GigabitEthernet0/0/3           Selected    1GE          10          263      2609    10111100   1

GigabitEthernet0/0/4             Unselect     1GE          32768    264      2609    10100000  1

NOTE:

Method for identifying the selected Eth-Trunk member interface:

In LACP mode (the value of WorkingMode is LACP), the value of Status of the interface is Selected.

In manual load balancing mode (the value of WorkingMode is NORMAL), the value of Status of the interface is Up.