1-6z Establishing an XRN 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 XRN for other ports or globally. Otherwise, you cannotenable the fabric port. For detailed restrictions refer to the error information output by devices.z When you have enabled fabric port function for a fabric port group, if you need to change the fabricport group, you must disable the fabric function of the current fabric port group before you configureanother group. Otherwise, the system will prompt that the current fabric port group is in use, youcannot change the fabric port group.z As shutting down a fabric port directly may cause the fabric to be split and error messages, do notperform such operations.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 You can shut down/bring up a port after you disable the fabric feature on the port.z If you need to configure an XRN fabric as a DHCP relay or DHCP client, configure the UDP Helperfunction in the fabric at the same time to ensure that the client can successfully obtain an IPaddress. (Since this configuration can be automatically synchronized to the entire fabric, you canperform it on only one unit.) For the configuration of the UDP Helper function, refer to the UDPHelper part in this manual.z After you use the port link-type xrn-fabric command to specify a port as the fabric port, youcannot use the port link-type command to change the port to a port of other types. You must usethe undo fabric-port command first to disable the fabric port function of the port to change the porttype.Specifying the VLAN Used to Form an XRN FabricWhen the devices in an XRN fabric are transmitting XRN data, to avoid it being sent to other non fabricports, the data should be transmitted in a specified VLAN. You can specify the VLAN used to transmitXRN data.Follow these steps to specify the VLAN used to form an XRN fabric:To do… Use the command… RemarksEnter system view system-view —Specify the VLAN used to forman XRN fabric ftm fabric-vlan vlan-idRequiredBy default, the VLAN used toform the XRN fabric is VLAN4093You cannot specify an existing VLAN to form an XRN fabric; otherwise, your configuration fails.
