Link aggregation modes, Aggregating links in static mode, Choosing a reference port – H3C Technologies H3C S5560 Series Switches User Manual
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Feature
Considerations
VLAN
VLAN attribute configurations include the following:
•
Permitted VLAN IDs.
•
PVID.
•
Link type (trunk, hybrid, or access).
•
Operating mode (promiscuous, trunk promiscuous, host).
•
VLAN tagging mode.
For information about VLAN, see "Configuring VLANs."
•
Protocol configurations—Protocol configurations do not affect the aggregation state of the member
ports. MAC address learning and spanning tree settings are examples of protocol configurations.
NOTE:
The protocol configuration for a member port is effective only when the member port leaves the
aggregation group.
Link aggregation modes
Link aggregation has dynamic and static modes:
•
Static aggregation mode—Aggregation is stable. The aggregation state of the member ports are
not affected by the peer ports.
•
Dynamic aggregation mode—The peering system automatically maintains the aggregation state of
the member ports, which reduces the administrators' workload.
An aggregation group in static mode is called a "static aggregation group" and an aggregation group
in dynamic mode is called a "dynamic aggregation group."
Aggregating links in static mode
Choosing a reference port
When setting the aggregation state of the ports in an aggregation group, the system automatically
chooses a member port as the reference port. A Selected port must have the same operational key and
attribute configurations as the reference port.
The system chooses a reference port from the member ports that are in up state with the same attribute
configurations as the aggregate interface.
The candidate ports are sorted in the following order:
1.
Highest port priority
2.
Full duplex/high speed
3.
Full duplex/low speed
4.
Half duplex/high speed
5.
Half duplex/low speed
The candidate port at the top is chosen as the reference port.