1-1
1 Smart Link Configuration
When configuring smart link, go to these sections for information you are interested in:
z Smart Link Overview
z Configuring Smart Link
z Displaying and Maintaining Smart Link
z Smart Link Configuration Example
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
Switch A
Switch B Switch C
Eth1/0/1 Eth1/0/2
uplink uplink
Master Port Slave Port
In
Figure 1-1, Ethernet 1/0/1 and Ethernet 1/0/2 on Switch A are two member ports of a smart link group.
Master port
The master port can be either an Ethernet port or a manually-configured or static LACP aggregation
group. For example, you can configure Ethernet 1/0/1 of switch A in
Figure 1-1 as the master port
through the command line.
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