H3C S5120-EI Series Configuration Manual

Also see for S5120-EI Series: Configuration guide Installation manual Configuration guide Configuration guide Operation manual

Contents

H3C S5120-EI Series Configuration Manual Manual pdf 108 page image

99function to monitor the uplink ports of the upstream devices. Monitor Link adapts the up/down state ofdownlink ports to the up/down state of uplink ports, triggering Smart Link to perform link switchover onthe downstream device.For more information about Monitor Link, see "Configuring Monitor Link."Collaboration between Smart Link and CC of CFDSmart Link cannot sense by itself when faults (for example, unidirectional link, misconnected fibers, andpacket loss) occur on the intermediate devices or network paths, or when faults are cleared. To check thelink status, Smart Link ports must use link detection protocols. When a fault is detected or cleared, the linkdetection protocols inform Smart Link to switch over the links.With the collaboration between Smart Link and the Continuity Check (CC) function of Connectivity FaultDetection (CFD) configured, CFD notifies the ports of fault detection events on the basis of detectionVLANs and detection ports. A port responds to a continuity check event only when the control VLAN ofthe smart link group to which it belongs matches the detection VLAN.For more information about the CC function of CFD, see "Configuring CFD."Smart Link configuration task listA smart link device is a device that supports Smart Link and is configured with a smart link group and atransmit control VLAN for flush message transmission. Device C and Device D in Figure 22 are twoexamples of smart link devices.An associated device is a device that supports Smart Link and receives flush messages sent from thespecified control VLAN. Device A, Device B, and Device E in Figure 22 are examples of associateddevices.Complete the following tasks to configure Smart Link:Task RemarksConfiguring a Smart Link deviceConfiguring protected VLANs for a smart linkgroup RequiredConfiguring member ports for a smart link group RequiredConfiguring role preemption for a smart linkgroup OptionalEnabling the sending of flush messages OptionalConfiguring the collaboration between SmartLink and CC of CFD OptionalConfiguring an associated device Enabling the receiving of flush messages RequiredConfiguring a Smart Link deviceConfiguration prerequisites• Before configuring a port as a smart link group member, shut down the port to prevent loops. Youcan bring up the port only after completing the smart link group configuration.