What types of interfaces on CE switches can be added to an Eth-Trunk

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Only Ethernet interfaces with the same rate can be added to the same Eth-Trunk.

For example, the GE interface and 10GE interface or the 10GE interface and 40GE interface cannot be added to the same Eth-Trunk, while GE electrical interfaces and GE optical interfaces can.

Other related questions:
Can a converted interface be added to an Eth-Trunk
Converted interfaces can be added to an Eth-Trunk. The configuration method is the same as that for adding a physical interface to an Eth-Trunk. # Add converted interface 40GE1/0/1:1 to Eth-Trunk2. system-view [~HUAWEI] interface eth-trunk 2 [*HUAWEI-Eth-Trunk2] trunkport 40ge 1/0/1:1 [*HUAWEI-Eth-Trunk2] commit

Whether the firewall supports adding Eth-Trunk to a link group
Adding the Eth-Trunk interface to the link group on the USG The Eth-Trunk interface can be added to the link group. The link group status is Down only when all member interfaces of the Eth-Trunk are Down.

Assigning an Eth-Trunk interface to a security zone
If the Eth-Trunk interface of the USG is a Layer 3 interface, you need to assign the Eth-Trunk interface to a security zone. [FW]firewall zone untrust [FW-zone-untrust]add interface Eth-Trunk

The type of Eth-Trunk member interfaces on S series switches
Observe the following guidelines when adding member interface to an Eth-Trunk on S series switches (except the S1700): 1. The member interface cannot be configured with some services or static MAC address entries. For example, when an interface is added to an Eth-Trunk, the interface must use the default link type. 2. An Eth-Trunk cannot be added to another Eth-Trunk. Member interfaces of an Eth-Trunk must use the same Ethernet type and rate. Interfaces that use different Ethernet types and rates cannot join the same Eth-Trunk. For instance, GE interfaces and FE interfaces cannot join the same Eth-Trunk, but GE electrical interfaces and GE optical interfaces can join the same Eth-Trunk. 3. Both devices of the Eth-Trunk must use the same number of physical interfaces, interface rate, duplex mode, and flow control mode. 4. If an interface of the local device is added to an Eth-Trunk, an interface of the remote device directly connected to the interface of the local device must also be added to an Eth-Trunk; otherwise, the two ends cannot communicate.

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