H3C Technologies H3C S3100 Series Switches - Manual (Page 947)

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Smart Link Configuration
Currently, only S3100-EI series Ethernet switches support the smart link feature.
Smart Link Overview
As shown in Figure 1-1 , dual-uplink networking is widely applied currently. Usually, spanning tree
protocol (STP) is used to implement link redundancy backup in the network. However, STP is not
suitable for users with a high demand for convergence time. Smart Link can achieve active/standby link
redundancy backup and fast convergence to meet the user demand.
Smart Link has the following features:
z Active/standby backup for dual-uplink networking
z Simple configuration and operation
Basic Concepts in Smart Link
Smart Link group
A Smart Link group consists of two member ports, one master port and one slave port. Normally, only
one port (master or slave) is active, and the other port is blocked, that is, in the standby state. When link
failure occurs on the port in active state, the Smart Link group will block the port automatically and turn
standby state to active state on the blocked port.
Figure 1-1 Network diagram of Smart Link
In Figure 1-1 , Ethernet1/0/1 and Ethernet1/0/2 on Switch A are two member ports of a Smart Link
group.