The type of Eth-Trunk member interfaces on S series switches

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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.

Other related questions:
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 cannot be implemented among member interfaces of an Eth-Trunk on S series switches
Cause 1: Traffic is unevenly balanced among active links of an Eth-Trunk due to the incorrect load balancing mode. 1. Run the display eth-trunk command to check whether the load balancing mode of the Eth-Trunk meets the actual networking requirements. For example, load balancing based on source and destination IP addresses is not recommended on an L2 network. 2. Run the load-balance command to set the load balancing mode that meets the traffic requirements. Cause 2: When an Eth-Trunk interface in static LACP mode goes Up and Down frequently due to unstable physical links, LACP flapping occurs accordingly. As a result, services transmitted on the Eth-Trunk link are affected. When the LACP preemption delay is configured, LACP negotiation is not performed during the delay period; therefore. As a result, LACP flapping will not occur and services will not be affected. You can run the lacp preempt enable command to enable the LACP preemption function and then run the lacp preempt delay delay-time command to specify the LACP preemption delay.

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

How do I configure the link type of an Eth-Trunk interface to Hybrid on S series switches
For S series switches (except the S1700), use the following method to configure the link type of an Eth-Trunk interface to Hybrid: # Configure Eth-Trunk 1 to allow packets from VLAN 10 and VLAN 20 to pass through. [HUAWEI] interface eth-trunk 1 [HUAWEI-Eth-Trunk1] port link-type hybrid [HUAWEI-Eth-Trunk1] port hybrid tagged vlan 10 20 [HUAWEI-Eth-Trunk1] quit

In which views can IPSG be enabled on S series switches
IPSG can be enabled on an S series switch (except the S1700) in an interface or a VLAN view. Interface views include the Ethernet interface view, GE interface view, 40GE interface view, XGE interface view, 100GE interface view, Eth-Trunk interface view, and port group view. Example 1: Enable IPSG in the GE0/0/1 view. [HUAWEI] interface gigabitethernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] ip source check user-bind enable Example 2: Enable IPSG in the VLAN 100 view. [HUAWEI] vlan 100 [HUAWEI-vlan100] ip source check user-bind enable

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