Does the Eth-Trunk specifications change after S series switches are stacked together


Eth-Trunk specifications remain unchanged after S series switches (except the S1700) are stacked together.

Other related questions:
Does S series switch support inter-chassis Eth-Trunk
The S series switches support inter-chassis Eth-Trunk. The Eth-Trunks on different stand-alone switches can form an E-Trunk. An E-Trunk protects the links between the CE and PEs and implements backup between PEs.

How to configure load balancing for the Eth-Trunk on S series switches
S series switches (except the S1700) use a per-flow load balancing mechanism, which ensures that frames of the same data flow are forwarded on the same physical link, and different data flows are forwarded on different physical links. You can configure common load balancing mode to implement load balancing based on IP addresses or MAC addresses of packets. For L2, IP, and MPLS packets, you can also configure enhanced load balancing mode. Load balancing takes effect only for the outbound traffic. Therefore, load balancing modes can be different on the two ends of a link. 1. Commands for configuring common load balancing mode: [HUAWEI] interface Eth-Trunk 1 [HUAWEI-Eth-Trunk1] load-balance dst-mac 2. Commands for configuring enhanced load balancing mode: [HUAWEI] load-balance-profile a [HUAWEI-load-balance-profile-a] l2 field smac [HUAWEI-load-balance-profile-a] quit [HUAWEI] interface Eth-Trunk 1 [HUAWEI-Eth-Trunk1] load-balance enhanced profile a For configuration cases about common load balancing mode, see "Typical Ethernet Switching Configuration -Link Aggregation Configuration- Example for Configuring Link Aggregation in Manual Mode When Switches Are Directly Connected" in S1720&S2700&S3700&S5700&S6700&S7700&S9700 Typical Configuration Examples. The configuration cases of common load balancing are applicable to all S series switch models. The Sx700 series switch is used here as an example.

Does an S series switch support link aggregation after stacking configuration
S series switches (except the S1700) support link aggregation after stacking configuration.

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.

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