Less downtime for Increase Number of Eth-Trunk Member Interfaces

Adding Member Interfaces to an Eth-Trunk

NOTICE

When the ARP resource allocation mode is set to local (Configuring the ARP Resource Allocation Mode), if the outbound interface is an Eth-Trunk, be aware of the following:

• 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 distributed among multiple 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 distributed 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 distributed among multiple 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 3-14. 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 3-15.

• When a new member interface needs to join an Eth-Trunk and it is located on a different card 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 card where the member interface resides has insufficient ARP resources, packet forwarding is affected.

Figure 3-14 Recommended deployment mode (when the member interfaces of multiple Eth-Trunks are distributed among multiple cards)
Figure 3-15 Deployment mode that is not recommended (when the member interfaces of multiple Eth-Trunks are distributed among multiple cards)

When adding an interface to an Eth-Trunk, pay attention to the following points:

• On the CE12800E, an Eth-Trunk contains a maximum of 64 member interfaces. On other models, the maximum number of member interfaces in each Eth-Trunk depends on the assign forward eth-trunk mode command.

• A member interface cannot be configured with some services or static MAC addresses.

• When adding an interface to an Eth-Trunk, ensure that the interface uses the default link type.

• An Eth-Trunk cannot be added to another 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.

• 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.

1. Run system-view

   
   

   The system view is displayed.

   
   

2. Run interface eth-trunk trunk-id

   
   

   The Eth-Trunk interface view is displayed.

   
   

3. Run trunkport interface-type { interface-number1 [ to interface-number2 ] } &<1-n>

   
   

   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.

    NOTE:

   For the CE12800E, the value of n is 64. For other models, the value of n depends on the assign forward eth-trunk mode command.

   
   

4. Run commit

   
   

   The configuration is committed.

   
   

Add member interfaces to an Eth-Trunk in the member interface view.

1. Run system-view

   
   

   The system view is displayed.

   
   

2. Run interface interface-type interface-number

   
   

   The member interface view is displayed.

   
   

3. Run eth-trunk trunk-id

   
   

   The member interface is added to an Eth-Trunk.

   
   

4. Run commit

   
   

   The configuration is committed.

   
   

5. 
   

Hi,

To avoid affecting services, I think you should restart the devices one by one. For safety,  it is  recommended that you contact the TAC for risk assessment before performing operations.