1-7To do… Use the command… RemarksSpecify the fabric port of a switch fabric-port interface-typeinterface-number enableRequiredNot specified by defaultz Establishing an IRF system requires a high consistency of the configuration of each device. Hence,before you enable the fabric port, do not perform any configuration for the port, and do notconfigure some functions that affect the IRF for other ports or globally. Otherwise, you cannotenable the fabric port. For detailed restrictions refer to the error information output by devices.z After an IRF fabric is created, you are not recommended to enable the Burst function on any fabricdevice. For the introduction to the Burst function, refer to the QoS-QoS Profile part in this manual.z To split a fabric, you can simply remove the cables used to form the fabric or disable the fabricusing the undo fabric-port enable command.z If you need to configure an IRF fabric as a DHCP server, DHCP relay or DHCP client, configure theUDP Helper function in the fabric at the same time to ensure that the client can successfully obtainan IP address. For the configuration of the UDP Helper function, refer to the UDP Helper part in thismanual.Setting a Unit ID for a SwitchFTM will automatically number the switches to constitute an IRF fabric by default, so that each switchhas a unique unit ID in the fabric. You can use the command in the following table to set unit IDs forswitches. Make sure to set different unit IDs for different switches in an IRF fabric. Otherwise, FTM willautomatically number the switches with the same unit ID.Follow these steps to set a unit ID for a switch:To do… Use the command… RemarksEnter system view system-view —Set a unit ID for the switch change self-unit to { unit-id |auto-numbering }OptionalBy default, the unit ID of a switch that belongsto no IRF fabric is 1. The unit ID of a switchbelonging to an IRF fabric is assigned by FTM.Unit ID ranges from 1 to 8.If you do not enable the fabric port, you cannot change the unit ID of the local switch.After an IRF fabric is established, you can use the following command to change the unit IDs of theswitches in the IRF fabric.Follow these steps to set a unit ID to a new value:
