CX31x Smart Link configuration

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Smart Link is a link backup feature that implements a fast switchover between two ports, one of which acts as a backup of the other. The Smart Link feature is used on dual-uplink networking to provide effective link backup and fast switchover mechanisms. The advantages are described as follows:
? When both uplinks are running normally, one link is in forwarding state (active) and the other is in blocking state (inactive), preventing packet looping on the network.
? Smart Link is easy to configure and use.
? If the active link fails, traffic is switched to the standby link within milliseconds to ensure continued data forwarding.

For details about the CX31x Smart Link configuration, see the following documents.
? C00 version:
http://support.huawei.com/enterprise/en/doc/DOC1000044778/?idPath=7919749|9856522|21782478|19955021|19961380
? C10 version:
http://support.huawei.com/enterprise/en/doc/DOC1000041694/?idPath=7919749|9856522|21782478|19955021|19961380

Other related questions:
Can the loop detection and smart link functions be used together on an S series switches
You are not advised to configure both the loop detection and smart link functions on S series (except the S1700) or E series switches.

Meaning of the CX31x converged switching
Converged switching (which is not strictly defined) indicates the switching that adopts DCB Ethernet switches that support FCoE traffic and E9000 CX310, CX311, and CX312 converged switch modules. Converged networking (which is not strictly defined) indicates the Ethernet networking in the server field that bears the traditional Ethernet data traffic and FCoE traffic. This Ethernet networking must be based on the DCB feature.

How does the switch process received Flush packets of smart link
After receiving Flush packets of Smart Link, the switch checks the password in the Flush packets. If the control VLAN and password in the Flush packets are the same as those configured on the interface, the switch deletes MAC address entries. If the control VLAN and password in the Flush packets are different from those configured on the interface, the switch discards the Flush packets. Different versions delete MAC address entries differently: --V100R002 and V100R003: delete global MAC address entries. --V100R005, V100R006, V200R001, and V200R002: delete only MAC address entries on the interface with the smart-link flush receive command configured. --V200R003 and later versions: delete only MAC address entries on the interface where the smart-link flush receive command is configured and the control VLAN specified in the command is the same as the control VLAN in the Flush packets.

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