Adding Member Interfaces to an Eth-Trunk
Context
You can add member interfaces to an Eth-Trunk in the Eth-Trunk interface view or member interface view.
When the ARP resource allocate mode is set to local (Configuring the ARP Resource Allocation Mode), if the outbound interface is an Eth-Trunk, the following situations may occur:
You are advised to deploy member interfaces orderly on the device for the Eth-Trunk.
When the member interfaces of the Eth-Trunk need to be deployed on different cards, you are advised to add the interfaces with the same sequence number on different cards to the Eth-Trunk. For example, if the member interfaces of the Eth-Trunk need to be deployed in slots 3 and 4, you can add the interfaces numbered 1 (such as 10GE3/0/1 and 10GE4/0/1) to the Eth-Trunk.
When the member interfaces of multiple Eth-Trunks need to be deployed on different cards, deploy these member interfaces only on certain cards. For example, when the number of interfaces in slots 1 and 2 meets the requirement and the member interfaces of Eth-Trunk 1 have been deployed in the two slots, you are advised to deploy the member interfaces of Eth-Trunk 2 and Eth-Trunk 3 in slots 1 and 2, as shown in Figure 3-18. Do not deploy the member interfaces of multiple Eth-Trunks disorderly on different cards. For example, do not deploy the member interfaces of Eth-Trunk 1 in slots 1 and 2, those of Eth-Trunk 2 in slots 2 and 3, and those of Eth-Trunk 3 in slots 1 and 3, as shown in Figure 3-19.
When a new member interface needs to be added to an Eth-Trunk and is located on different cards from the other member interfaces, you are advised to check whether there is any alarm about insufficient ARP resources (Trap OID 1.3.6.1.4.1.2011.5.25.227.2.1.20 and alarm reason numbered 174). If the ARP resources on the card of the member interface are insufficient, packet forwarding is affected.
When adding an interface to an Eth-Trunk, pay attention to the following points:
On the CE12800E that has the ED-E/EG-E/EGA-E series cards installed, an Eth-Trunk contains a maximum of 128 member interfaces. On the CE12800E that has the FD-X series cards installed , the maximum number of member interfaces in each Eth-Trunk depends on the assign forward eth-trunk mode command.
On the CE12800, the maximum number of member interfaces in each Eth-Trunk depends on the assign forward eth-trunk mode command.
- When member interfaces are added to an Eth-Trunk, they must use the default interface type and cannot be configured with some services or static MAC address entries.
- Physical Ethernet interfaces, including split interfaces, can be added to an Eth-Trunk. However, logical interfaces such as Layer 3 interfaces, VLANIF interfaces, and Eth-Trunks cannot be added to an Eth-Trunk.
- An Ethernet interface can be added to only one Eth-Trunk. To add the Ethernet interface to another Eth-Trunk, delete it from the Eth-Trunk first.
Different Ethernet interfaces can be added to the same Eth-Trunk interface.
To enable interfaces operating at different rates to forward traffic after they are added to an Eth-Trunk in LACP mode, run the lacp mixed-rate link enable command.
When Eth-Trunk member interfaces work at different rates, the active interface is selected as follows: select an Actor based on the system priority and system ID, and then select the active interface based on the port priority and port ID of the Actor. To configure a specific interface as the active interface, run the lacp priority command in the interface view to increase the interface priority.
- 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 so that the two ends can communicate.
- After interfaces are added to an Eth-Trunk, the Eth-Trunk learns MAC addresses and ARP entries but member interfaces do not.
- Devices at both ends of an Eth-Trunk must use the same number of physical interfaces, interface rate, duplex mode, jumbo and flow control mode.
Procedure
- Add member interfaces to an Eth-Trunk in the Eth-Trunk interface view.
- (Optional) Run lacp mixed-rate link enable
Interfaces operating at different rates are enabled to forward packets after the interfaces are added to an Eth-Trunk interface in static LACP mode.
The rate of the interface added to the Eth-Trunk interface is not limited. For example, 10G and 100G interfaces can be added to the same Eth-Trunk interface.
- Run trunkport interface-type { interface-number1 [ to interface-number2 ] } &<1-n>
For the CE12800E that has the ED-E/EG-E/EGA-E series cards installed, the value of n is 128. For the CE12800E that has the FD-X series cards installed, the value of n depends on the assign forward eth-trunk mode command.
For the CE12800 series switches, the value of n depends on the assign forward eth-trunk mode command.
A member interface is added to the Eth-Trunk.
When you add member interfaces to an Eth-Trunk in a batch, if one interface cannot be added to the Eth-Trunk, all subsequent interfaces in the batch cannot be added to the Eth-Trunk, either.
- (Optional) Run lacp mixed-rate link enable
- Add member interfaces to an Eth-Trunk in the member interface view.
Follow-up Procedure
When the status of an Eth-Trunk member interface changes, the system sends traps containing the status change information for you to confirm whether the device encounters any fault. If you want to know the ID of the Eth-Trunk to which the member interface belongs, run the trunk-member trap in private-mib enable command to enable Eth-Trunk member interfaces to send traps through a private MIB. Traps sent through a private MIB carry the number of the specific Eth-Trunk interface.
After the trunk-member trap in private-mib enable command is run, traps are sent through a private MIB, instead of a public MIB. In this case, you can view the traps only by using the private MIB of Huawei.