H3C Technologies H3C S12500 Series Switches - Manual (Page 121)

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Configuring an associated switch
Configuration prerequisites
Disable the spanning tree feature on the associated device's ports that connect to the member ports of
the smart link group; otherwise, the ports will discard flush messages when they are not in forwarding
state in case of a topology change.
Enabling the receiving of flush messages
You do not need to enable all ports on the associated switches to receive flush messages sent from the
transmit control VLAN, only those on the master and slave links between the smart link switch and the
destination switch.
When you configure an associated switch, follow these guidelines:
• Configure all the control VLANs to receive flush messages.
• If no control VLAN is specified for processing flush messages, the switch forwards the received flush
messages without processing them.
• Make sure the receive control VLAN is the same as the transmit control VLAN configured on the
Smart Link switch. If they are not the same, the associated switch will forward the received flush
messages without any processing.
• Do not remove the control VLANs. Otherwise, flush messages cannot be sent correctly.
• Make sure the control VLANs are existing VLANs, and assign the port capable of receiving flush
messages to the control VLANs.
To enable the receiving of flush messages:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet interface view or
Layer 2 aggregate interface
view.
interface interface-type
interface-number
N/A
3. Configure the control VLAN for
receiving flush messages.
smart-link flush enable
[ control-vlan vlan-id-list ]
No control VLAN exists for receiving
flush messages of Smart Link by
default.
Displaying and maintaining Smart Link
Task Command Remarks
Display smart link group
information.
display smart-link group { group-id
| all } [ | { begin | exclude |
include } regular-expression ]
Available in any view.