F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices High Availability Configuration Guide-6PW100

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The bandwidth of an aggregate link increases along with the number of selected member ports. To avoid
congestion caused by an insufficient number of Selected ports on an aggregate link, set the minimum
number of Selected ports required for bringing up the specific aggregate interface.
This minimum threshold setting affects the aggregation state of both aggregation member ports and the
aggregate interface, as follows:
• All member ports change to the Unselected state and the link of the aggregate interface goes down,
when the number of member ports eligible for being selected is smaller than the minimum
threshold.
• When the minimum threshold is reached, the eligible member ports change to the Selected state,
and the aggregate interface link goes 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 using the following guideline: 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.
1. Configuration guidelines
Follow these guidelines when you configure the port threshold settings:
• If you set a minimum threshold for a static aggregation group, also make the same setting for its
peer aggregation group to guarantee correct aggregation.
• Make sure the two link aggregation ends have the same limit on the number of selected ports.
Make sure you understand the following impacts of the port threshold settings:
• Configuring the minimum number of Selected ports required to bring up an aggregation group may
cause all the member ports in the aggregation group to become unselected.
• Configuring the maximum number of Selected ports in an aggregation group may cause some of
the selected member ports in the aggregation group to become unselected.
2. Configuration procedure
To limit the number of Selected ports for an aggregation group:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter aggregate interface
view.
• Enter Layer 2 aggregate
interface view:
interface bridge-aggregation
interface-number
• Enter Layer 3 aggregate
interface view:
interface route-aggregation
interface-number
Use either command.
3. Set the minimum number of
Selected ports for the
aggregation group.
link-aggregation selected-port
minimum number
Not specified by default.