1-5
To do… Use the command… Remarks
Enable the function of sending
flush messages in the specified
control VLAN
flush enable control-vlan
vlan-id
Optional
By default, no control VLAN for
sending flush messages is
specified.
Configuring Associated Devices
An associated device mentioned in this document refers to a device that supports Smart Link and
locally configured to process flush messages received from the specified control VLAN so as to work
with the corresponding Smart Link device. As shown in Figure 1-2, all the devices including Switch C,
Switch D, and Switch E on the active and backup links connecting the Smart Link device (Switch A) and
the target uplink device (Switch E) are all associated devices.
However, you do not have to enable all the ports of an associated device to process flush messages
received from the specified control VLAN. You need to enable this function only on the ports that are on
the active and backup links connecting the Smart Link device and the target device. As shown in Figure
1-2, you need to enable this function on GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3 of Switch C,
GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3 of Switch D, and GigabitEthernet 1/0/11 and
GigabitEthernet 1/0/12 of Switch E.
Follow these steps to enable the specified port to process flush messages received from the specified
control VLAN:
To do… Use the command… Remarks
Enter system view system-view —
System
view
smart-link flush enable control-vlan vlan-id port
interface-type interface-number [ to interface-type
interface-number ]
interface interface-type interface-number
Enable the
specified
port(s) to
process
flush
messages
received
from the
control
VLAN
Ethernet
port view smart-link flush enable control-vlan vlan-id
Required, use
either
approach.
By default, no
control VLAN
for receiving
flush messages
is specified.
Precautions
When configuring Smart Link, pay attention to the following points:
z A port or a link aggregation group cannot serve as a member port for two Smart Link groups. On
the other hand, a port or a link aggregation group cannot serve as a member for a Smart Link group
and a Monitor Link group at the same time.
z STP cannot be enabled on the member ports of a Smart Link group. An STP-enabled port or a link
aggregation group with an STP-enabled port cannot serve as a member port for a Smart Link
group.
z A Smart Link/Monitor Link group with members cannot be deleted.
z Smart Link/Monitor Link is mutually exclusive with remote port mirroring.
z When a Combo port operates as a member port of a Smart Link group, the optical port and the
electrical port of the Combo port must not be both engaged with a cable at the same time.