Dell PowerConnect B-RX Configuration Manual page 318

8
Configuration of a LAG
The ports added to a LAG are ethernet as specified for the slot/port where they reside. The ports
can be added to the LAG sequentially as shown in the following example.
BigIron RX(config-lag-blue)# ports ethernet 3/1 ethernet 7/2 ethernet 4/3 ethernet
3/
A range of ports from a single interface module can be specified. In the following example, Ethernet
ports 1, 2, 3 and 4 on the interface module in slot 3 are configured in a single LAG.
BigIron RX(config-lag-blue)# ports ethernet 3/1 to 3/4
Additionally, you can mix a range of ports from one interface module with individual ports from
other interface modules to form a LAG as shown in the following.
BigIron RX(config-lag-blue)# ports ethernet 3/1 to 3/4 ethernet 10/2
NOTE
A port can be added to or deleted from a LAG only if the LAG is not currently deployed.
Configuring the primary port for a LAG
In previous versions of the Multi-Service IronWare software, the lowest number port was assigned
as the primary port in a trunk or LACP configuration. The primary port must be explicitly assigned.
using the primary port command.
To designate the primary port for the static LAG "blue", use the following command.
BigIron RX(config)# lag blue static
BigIron RX(config-lag-blue)# primary port 3/2
Syntax: [no] primary port <slot/port>
Once a primary port has been configured for a LAG, all configurations that apply to the primary port
are applied to the other ports in the LAG.
NOTE
This configuration is only applicable for configuration of a static or dynamic LAGs.
Specifying the trunk threshold for a trunk Group
You can configure the BigIron RX switch to disable all of the ports in a trunk group when the
number of active member ports drops below a specified threshold value. For example, if a trunk
group has 8 ports, and the threshold for the trunk group is 5, then the trunk group is disabled if the
number of available ports in the trunk group drops below 5. If the trunk group is disabled, then
traffic is forwarded over a different link or trunk group.
NOTE
This configuration is only applicable for configuration of a static or dynamic LAGs.
For example, the following commands establish a trunk group consisting of 4 ports, then establish
a threshold for this trunk group of 3 ports.
BigIron RX(config)# lag blue static
BigIron RX(config-lag-blue)# ports ethernet 3/1 to 3/4
BigIron RX(config-lag-blue)# trunk-threshold 3
In this example, if the number of active ports drops below 3, then all the ports in the trunk group
are disabled.
242 BigIron RX Series Configuration Guide
53-1002253-01