Operation Manual – IRF FabricH3C S5600 Series Ethernet Switches Chapter 1 IRF Fabric Configuration1-7Note:z Establishing an IRF system requires a high consistency of the configuration of eachdevice. Hence, before you enable the fabric port, do not perform any configurationfor the port, and do not configure some functions that affect the IRF (such asTACACS and VLAN-VPN) for other ports or globally. Otherwise, you cannot enablethe fabric port. For detailed restrictions refer to the error information output bydevices.z After an IRF fabric is established successfully, do not enable the burst function onany device within the IRF Fabric. For introduction to the burst function, refer to theQoS&QoS Profile part of the manual.z To split a fabric, you can simply remove the cables used to form the fabric or disablethe fabric using the undo fabric-port enable command.z If you need to configure an IRF fabric as a DHCP server, configure the UDP Helperfunction in the fabric at the same time to ensure that the client can successfullyobtain an IP address. (Since this configuration can be automatically synchronized tothe entire fabric, you can perform it on only one unit.) For the configuration of theUDP Helper function, refer to the UDP Helper part of this manual.1.2.3 Setting a Unit ID for a SwitchOn the switches that support automatic numbering, FTM will automatically number theswitches to constitute an IRF fabric by default, so that each switch has a unique unit IDin the fabric. You can use the command in the following table to set unit IDs for switches.Make sure to set different unit IDs for different switches in an IRF fabric. Otherwise,FTM will automatically 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 theswitchchange self-unit to{ unit-id |auto-numbering }OptionalBy default, the unit ID of a switchthat belongs to no IRF fabric is 1.The unit ID of a switch belonging toan IRF fabric is assigned by FTM.Unit ID ranges from 1 to 8.Note:If you do not enable the fabric port, you cannot change the unit ID of the local switch.
