3Com S7902E, Руководство по настройке

Страница: 2131 / 2621

1-5
configured with role preemption, GE2/0/1 takes over to forward traffic as soon as the former master link
recovers, while GE2/0/2 is automatically blocked and placed in the standby state.
Load sharing mechanism
A ring network may carry traffic of multiple VLANs. Smart link can forward traffic of different VLANs in
different smart link groups, thus implementing load sharing.
To implement load sharing, you can assign a port to multiple smart link groups (each configured with
different protected VLANs), making sure that the state of the port is different in these smart link groups.
In this way, traffic of different VLANs can be forwarded along different paths.
You can configure protected VLANs for a smart link group by referencing MSTIs.
Collaboration Between Smart Link and CC of CFD
Smart link cannot sense by itself when faults (for example, unidirectional link, misconnected fibers, and
packet loss) occur on the intermediate devices or network paths, or when faults are cleared. To check
the link status, smart link ports need to use link detection protocols. When a fault is detected or cleared,
the link detection protocols inform Smart Link to switch over the links.
With the collaboration between Smart Link and the Continuity Check (CC) function of Connectivity Fault
Detection (CFD) configured, CFD notifies the ports of fault detection events on the basis of detection
VLANs and detection ports. A port responds to a continuity check event only when the control VLAN of
the smart link group to which it belongs matches the detection VLAN.
For more information about the CC function of CFD, refer to Connectivity Fault Detection Configuration
in the High Availability Volume .
Smart Link Configuration Task List
Complete the following tasks to configure Smart Link:
Task Remarks
Configuring Protected VLANs for a Smart Link Group Required
Configuring Member Ports for a Smart Link Group Required
Configuring Role Preemption for a Smart Link Group Optional
Enabling the Sending of Flush Messages Optional
Configuring a Smart
Link Device
Configuring the Collaboration Between Smart Link and
CC of CFD
Optional
Configuring an
Associated Device
Enabling the Receiving of Flush Messages Required