Specifications

Configuring Link Aggregation
December 02, 2010 Page 10 of 23
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 4listslinkaggregationparametersandtheirdefaultvalues.
Procedure 1describeshowtoconfigurelinkaggregation.
Table 4 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.
N-Series, B2, B3, C2, C3: Enabled
S-Series, 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
Note: In Procedure 1, Step 6, setting flow regeneration, and Step 7, setting the output algorithm,
are only supported on the N-Series and S-Series products. All other steps are supported by the
N-Series, S-Series, stackable, and standalone switch products.
Procedure 1 Configuring Link Aggregation
Step Task Command(s)
1. In switch command mode, enable LACP on the
device. LACP state is enabled by default for all
devices.
set lacp {disable | enable}
2. Optionally, change the system priority for the
device.
set lacp asyspri value
3. Optionally, change the administratively assigned
key for each aggregation on the device.
set lacp aadminkey port-string value
4. Optionally, enable single port LAGs on the
device.
set lacp singleportlag {enable | disable}