1-5Configuring Associated DevicesAn associated device mentioned in this document refers to a device that supports Smart Link andlocally configured to process flush messages received from the specified control VLAN so as to workwith the corresponding Smart Link device. As shown in Figure 1-2, all the devices including Switch C,Switch D, and Switch E on the active and backup links connecting the Smart Link device (Switch A) andthe target uplink device (Switch E) are all associated devices.However, you do not have to enable all the ports of an associated device to process flush messagesreceived from the specified control VLAN. You need to enable this function only on the ports that are onthe active and backup links connecting the Smart Link device and the target device. As shown in Figure1-2, you need to enable this function on Ethernet 1/0/2 and Ethernet 1/0/3 of Switch C, Ethernet 1/0/2and Ethernet 1/0/3 of Switch D, and Ethernet 1/0/11 and Ethernet 1/0/12 of Switch E.Follow these steps to enable the specified port to process flush messages received from the specifiedcontrol VLAN:To do… Use the command… RemarksEnter system view system-view —System viewsmart-link flush enable control-vlan vlan-idport interface-type interface-number [ tointerface-type interface-number ]interface interface-type interface-numberEnable thespecified port(s)to process flushmessagesreceived fromthe controlVLANEthernet portview smart-link flush enable control-vlan vlan-idRequired, use eitherapproach.By default, nocontrol VLAN forreceiving flushmessages isspecified.PrecautionsWhen configuring Smart Link, pay attention to the following points:z A port or a link aggregation group cannot serve as a member port for two smart link groups. On theother hand, a port or a link aggregation group cannot serve as a member for a smart link group anda monitor link group at the same time.z STP cannot be enabled on the member ports of a smart link group. An STP-enabled port or a linkaggregation group with an STP-enabled port cannot serve as a member port for a smart link group.z A smart link/monitor link group with members cannot be deleted.z Smart Link/Monitor Link is mutually exclusive with remote port mirroring.z If you configure both the Smart Link and Monitor Link functions on an expandable resilientnetworking (XRN) enabled device, the Smart Link and Monitor Link functions will functionabnormally. Thus, you are recommended to disable the XRN function when configuring the SmartLink or Monitor Link function.z When a Combo port operates as a member port of a smart link group, the optical port and theelectrical port of the Combo port must not be both engaged with a cable at the same time.z When you copy a port, the smart link/monitor link group member information configured on the portwill not be copied to other ports.z If a single port is specified as a member of a smart link/monitor link group, you cannot execute thelacp enable command on this port or add this port into other dynamic link aggregation groups,because these operations will make this port become a link aggregation group member.
