Using Aggregating Links In Static Mode - HP A5830 Configuration Manual

Link-aggregation modes
Link-aggregation has the following modes: dynamic and static. Dynamic link-aggregation uses LACP and
static link-aggregation does not.
Table 5 A comparison between static and dynamic aggregation modes
Aggregation
mode
Static
Dynamic
The following points apply to a dynamic link-aggregation group:
 A Selected port can receive and send LACPDUs.
 An Unselected port can only receive and send LACPDU if it is up and has the same class-two
configurations as the aggregate interface.

Using aggregating links in static mode

LACP is disabled on the member ports in a static aggregation group. You must manually maintain the
aggregation state of the member ports.
The static link-aggregation process comprises:
Selecting a reference port

Setting the aggregation state of each member port

Selecting a reference port
The system selects a reference port from the member ports that are:
Are in the up state and have

Have the same class-two configurations as the aggregate interface.

The candidate ports are sorted by aggregation priority, duplex, and speed in the following order:
Lowest aggregation priority value

Full duplex/high speed

 Full duplex/low speed
 Half duplex/high speed
 Half duplex/low speed
The one at the top is selected as the reference port. If two ports have the same aggregation priority,
duplex mode, and speed, the one with the lower port number wins.
Table 5 compares the two aggregation modes.
LACP status on
Pros
member ports
Aggregation is stable. Peers do
Disabled not affect the aggregation state of
the member ports.
The administrator does not need
to maintain link-aggregations.
Enabled The peer systems maintain the
aggregation state of the member
ports automatically.
Cons
The member ports do not adjust
the aggregation state according
to that of the peer ports. The
administrator must manually
maintain link-aggregations.
Aggregation is unstable. The
aggregation state of the member
ports is susceptible to network
changes.
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