Configuring Link Aggregation
Fixed Switch Configuration Guide 11-9
The virtual link aggregation ports continue to be designated as lag.0.x, where x can range from 1
to 24, depending on the maximum number of LAGs configured.
Configuring Link Aggregation
This section provides details for the configuration of link aggregation on the N-Series, S-Series,
stackable, and standalone switch products.
Table 11-3 lists link aggregation parameters and their default values.
Procedure 11-1 describes how to configure link aggregation.
Table 11-3 Default Link Aggregation Parameters
Parameter Description Default Value
LACP State Current state of LACP on the device. Enabled
System Priority LACP system priority for this device. 32768
Port Key The Port Administrative Key (also
referred to as operational key).
32768
Port Priority Determines which ports move to the
attached state when ports of different
speeds form a LAG. Also determines
which ports join a LAG if the ports
available exceed the number of ports
supported by the device.
32768
Single Port State Allows or disallows a LAG to be
created with a single port.
Disabled (disallows creation of a single
port LAG)
LACP Port Active State Port state providing for transmission of
LACP PDUs.
B3, C3, G-Series, I-Series: Enabled
B5, C5: Disabled
LACP Port Timeout State Port state determining the frequency of
LACP PDU transmission and period
before declaring the partner LACP port
down if no response is received.
30 second: frequency of LACP PDU
transmission
90 seconds: period before declaring
the partner port down
Number of link
aggregation groups
The maximum number of link
aggregation groups (LAGs) that can be
supported. Number can be 6, 12, or
24.
6 LAGs, each with a maximum of 8
physical ports attached.
Procedure 11-1 Configuring Link Aggregation
Step Task Command(s)
1. Optionally, change the number of LAGs
supported from the default of 6.
Changing the group limit will result in a system
reset and LACP configuration settings will be
returned to their default values, with the
exception of the group limit.
set lacp groups {6|12|24}
2. Enable LACP on the device. LACP global state
is enabled by default for all devices.
set lacp {disable | enable}
3. Optionally, change the system priority for the
device.
set lacp asyspri value
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