Creating Trunks (Lags) - Alcatel OS-LS-6224 User Manual

CLI – The following is an example of the Port Configuration CLI commands:
Console# set interface active ethernet 1/e5
Console# configure
Console(config)# interface ethernet 1/e5
Console(config-if)# description "RD SW#3"
Console(config-if)# speed 100
Console(config-if)# duplex full
Console(config-if)# negotiation
Console(config-if)# flowcontrol on
Console(config-if)# mdix auto
Console(config-if)#

Creating Trunks (LAGs)

Link Aggregation optimizes port usage by linking a group of ports together to form a
single LAG (aggregated group). Aggregating ports multiplies the bandwidth between
the devices, increases port flexibility, and provides link redundancy. The device
supports up to eight ports per LAG, and eight LAGs per system.
The device supports both static LAGs and Link Aggregation Control Protocol (LACP)
LAGs. LACP LAGs negotiate aggregating ports' links with other LACP ports located
on a different device. If the other device ports are also LACP ports, the devices
establish a LAG between them.
• Consider the following when aggregating ports:
• All ports within a LAG must be the same media type.
• A VLAN is not configured on the port.
• The port is not assigned to a different LAG.
• Auto-negotiation mode is not configured on the port.
• The port is in full-duplex mode.
• All ports in the LAG have the same ingress filtering and tagged modes.
• All ports in the LAG have the same back pressure and flow control modes.
• All ports in the LAG have the same priority.
• All ports in the LAG have the same transceiver type.
• The device supports up to eight LAGs, and eight ports in each LAG.
• Ports can be configured as LACP ports only if the ports are not part of a previously
configured LAG.
• Ports added to a LAG lose their individual port configuration. When ports are
removed from the LAG, the original port configuration is applied to the ports.
The device uses a hash function to determine which packets are carried on which
aggregated-link member. The hash function statistically load-balances the
aggregated link members. The device considers an Aggregated Link as a single
logical port.
Note: To avoid creating a loop in the network, be sure you add a static trunk via the
configuration interface before connecting the ports, and also disconnect the
ports before removing a static trunk via the configuration interface.
back-pressure
Configuring Interfaces
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