R3166-R3206-HP High-End Firewalls High Availability Configuration Guide-6PW101

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Link aggregation increase bandwidth by aggregating multiple physical Ethernet links into one logical
link, called an aggregate link. The bandwidth of an aggregate link depends on the number of selected
ports in the corresponding aggregation group. To prevent congestion on an aggregate link when the
corresponding aggregation group contains too few selected ports, you can configure the minimum
number of selected ports in the corresponding aggregation group required for bringing up the
aggregate interface. In this way, when the number of member ports eligible for being selected in the
aggregation group is smaller than this number, the aggregate interface will not be brought up, allowing
the traffic to be switched to a backup link:
• If the number of member ports eligible for being selected in the aggregation group is smaller than
the value you configure here, all the member ports in the aggregation group will become
unselected, and the link state of the corresponding aggregate interface will change to down.
• After a change occurs to the selected/unselected state of member ports in the aggregation group,
if the number of member ports eligible for being selected in the aggregation group becomes
smaller than the number you configure here, all the member ports in the aggregation group will
become unselected, and the link state of the corresponding aggregate interface will change to
down.
• If the number of member ports eligible for being selected in the aggregation group reaches or
exceeds the number you configure here, these member ports will become selected, and the link
state of the corresponding aggregate interface will change to up.
By default, the maximum number of selected ports allowed in an aggregation group depends on the
hardware capabilities of the member ports. After you manually configure the maximum number of
selected ports in an aggregation group, the maximum number of selected ports allowed in the
aggregation group is the lower value of the two upper limits. You can configure redundancy between
two ports as follows: Assign two ports to an aggregation group, and configure the maximum number of
selected ports allowed in the aggregation group as 1. In this way, only one selected port is allowed in the
aggregation group at any point in time, while the unselected port serves as a backup port.
Follow these steps to configure the minimum and maximum number of selected ports in an aggregation
group:
To do... Use the command...
Remarks
Enter system view system-view —
Enter
aggregate
interface
view
Enter Layer 2 aggregate
interface view
interface bridge-aggregation
interface-number
Required
Use either command
Enter Layer 3 aggregate
interface view
interface route-aggregation
interface-number
Configure the minimum number of selected
ports in the aggregation group
link-aggregation selected-port
minimum number
Required
Not specified by default
Configure the maximum number of
selected ports allowed in the aggregation
group
link-aggregation selected-port
maximum number
Required
By default, the maximum
number of selected ports
allowed in an
aggregation group
depends on the
hardware capabilities of
the member ports.