Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 137)

a) A static LAG is created containing the port list specified in the trunk command. This LAG is
then automatically deployed.
b) The lowest-numbered port from the original trunk list is selected as the primary port of the
LAG.
c) The converted LAG is named "LAG_x", where "x" is a unique number assigned by the
system starting from 1.
2. For any dynamic link aggregation (LACP) group configured using the port-level link-aggregate
commands, the following conversion procedure is followed.
a)
A dynamic LAG is created by grouping all ports in the original configuration having the same
link-aggregation key.
b) If link-aggregate active/passive is configured originally, the converted dynamic LAG is
configured as deployed, otherwise is not be converted because such ports were originally
not operating under LACP.
c) If the original mode is passive, the converted dynamic LAG will be configured as deploy
passive . Otherwise active mode is the default.
d) The timeout configuration set by the command link-aggregate configure timeout will be
converted to the lacp-timeout command.
e) The value of the link-aggregate configure key command is used in the conversion in
determining the set of ports that form an LAG, so prior to upgrade the key must be
configured on all the link-agg groups. In the new LAG user interface, there is no need for a
user to explicitly configure a key. Each dynamic LAG will automatically select a unique key
for the system. Hence the original configured key will not be retained.
NOTE
You cannot copy configurations to the running configurations from a TFTP server. It is not
supported when you upgrade from a software version earlier to 08.0.00a to 8.0
configuration. The configuration must be saved on flash as startup configuration and reload
is required without write-memory.
f) The command link-aggregate configure system-priority is retired and will not be directly
converted. This value is currently not in use by the system's LACP protocol processing, and
will maintain a default value of 1.
g) The lowest-numbered port will be selected as the primary port of the LAG.
h) Port names configured in the original interface configuration will be converted to port names
within the LAG.
i) The converted LAG will be named "LAG_x", where "x" is a unique number assigned by the
system starting from 1.
Downgrade considerations
When you downgrade to an earlier software version from 08.0.00a, all the existing LAG configuration
will be lost.
LAG Load Sharing
Brocade devices load-share across the ports in the LAG group. The method used for the load sharing
depends on the device type and traffic type (Layer 2 or Layer 3).
Downgrade considerations
FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide 137
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