Aggregating Links In Static Mode - HP 5820X series Configuration Manual

Table 7 A comparison between static and dynamic aggregation modes
Aggregation
mode
Static
Dynamic
In a dynamic link aggregation group:
A selected port can receive and send LACPDUs.
•
An unselected port can receive and send LACPDUs only if it is up and have the same class-two
•
configurations as the aggregate interface.

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 procedure 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 in the up state and have the same
class-two configurations as the aggregate interface.
The candidate ports are sorted by duplex and speed in this order: full duplex/high speed, full
duplex/low speed, half duplex/high speed, and half duplex/low speed. The one at the top is selected as
the reference port. If two ports have the same duplex mode and speed, the one with the lower port
number wins out.
Setting the aggregation state of each member port
After selecting the reference port, the static aggregation group sets the aggregation state of each member
port, as shown in
LACP status on
Pros
member ports
Aggregation is stable. The
aggregation state of the member
Disabled
ports are not affected by the peer
ports.
The administrator does not need
to maintain link aggregations.
Enabled The peer systems maintain the
aggregation state of the member
ports automatically.
Figure 1 1.
38
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 instable. The
aggregation state of member
ports is susceptible to network
changes.