Setting the number of Eth-Trunk member interfaces on CE switches

44

Except that each Eth-Trunk on the CE5810EI supports a maximum of eight member interfaces, the maximum number of member interfaces on other switch models is configured using commands.
For the CE12800 and CE6870EI:
Run the assign forward eth-trunk mode { 256 | 512 | 1024 } command in the system view to set the number of Eth-Trunk member interfaces supported by the switch. By default, a maximum of 512 interfaces can be added to an Eth-Trunk on the switch.
When 256 is specified, the switch allows a maximum of 256 LAGs and each LAG supports a maximum of 64 member interfaces.
When 512 is specified, the switch allows a maximum of 512 LAGs and each LAG supports a maximum of 32 member interfaces.
When 1024 is specified, the switch allows a maximum of 1024 LAGs and each LAG supports a maximum of 16 member interfaces.
For CE8800&7800&6800&5800 series switches:
Run the assign forward eth-trunk mode { 64 | 128 | 256 | 512 | 1024 } command in the system view to set the number of Eth-Trunk member interfaces supported by the switch. By default, a maximum of 128 interfaces can be added to an Eth-Trunk on the switch.
When 64 is specified, the switch allows a maximum of 64 LAGs and each LAG supports a maximum of 32 member interfaces.
When 128 is specified, the switch allows a maximum of 128 LAGs and each LAG supports a maximum of 16 member interfaces.
When 256 is specified, the switch allows a maximum of 256 LAGs and each LAG supports a maximum of 8 member interfaces.
When 512 is specified, the switch allows a maximum of 512 LAGs and each LAG supports a maximum of 4 member interfaces.
When 1024 is specified, the switch allows a maximum of 1024 LAGs and each LAG supports a maximum of 2 member interfaces.
Description:
After the assign forward eth-trunk mode command is used to change the number of Eth-Trunk member interfaces supported by the switch, restart the switch to make the configuration take effect.

Other related questions:
How to determine the number of member interfaces in an Eth-Trunk
To ensure normal forwarding of burst traffic on an Eth-Trunk, the total bandwidth of the Eth-Trunk must be higher than the bandwidth of an interface that forwards normal traffic. To ensure that member interfaces of an Eth-Trunk evenly load balance traffic, you can use two, four, or eight member interfaces.

What is the maximum number of Eth-Trunks supported on S series switches
Hi, I cannot answer this question. For details about product specifications, please dial 4008229999 to consult Huawei technical support.

Number allocation of Eth-Trunk member interfaces on stacked S series switches
After you configure an Eth-Trunk on stacked S series switches (except the S1700), the member interface number remain unchanged even if you split the stack and stack the switches again.

Load balancing principle of Eth-Trunk member interfaces on CE switches
An Eth-Trunk has 16 timeslots for sending packets at each interval. Eth-Trunk member interfaces use the 16 timeslots to send packets in sequence. When the number of Eth-Trunk member interfaces is the nth power of 2, load balancing can be made more even. For example, if the number of Eth-Trunk member interfaces is 2, 4, or 8 (which is divisible by 16), the timeslot of the packets sent by each interface is an integer, making load balancing even. If it is not the nth power of 2 (for example, 3), a member interface gets 6 times for sending packets from 16 timeslots, while the other two only get 5 times. In this way, load balancing is not even. Therefore, you are advised to set the number of Eth-Trunk member interfaces to the nth power of 2, ensuring even load balancing.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top