Specifications
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Eth1/1610
Eth1/1620
Eth1/1630
Console(config)#
Link Aggregation
From the Link Aggregation page, you can create multiple links between switches that work as one virtual, aggregate link. You can create up to six trunks at a
time, with each trunk containing up to four ports. A port trunk offers a dramatic increase in bandwidth for network segments where bottlenecks exist and
provides a fault-tolerant link between two devices.
The switch supports two types of link aggregation—static and Link Aggregation Control Protocol (LACP).
LACP-configured ports automatically negotiate a trunked link with LACP-configured ports on another device. You can configure any number of ports on the
switch as LACP, as long as they are not already configured as part of another trunk. If ports on another device are also configured as LACP, the switch and
the other device negotiate a trunk link between them. If an LACP trunk consists of four ports, all other ports are placed in a standby mode. If one link in the
trunk fails, one of the standby ports is automatically activated to replace it.
Use the following guidelines when you configure port trunks:
l Finish configuring port trunks before you connect the corresponding network cables between switches.
l You can configure up to six trunk groups, with up to four ports as a trunk group.
l All ports in the same trunk must consist of the same media type (for example, twisted-pair or fiber).
l The ports on both ends of the trunk must be configured for the same VLAN, speed, duplex mode, flow control, and CoS settings.
l If the target switch has also enabled LACP on the connected ports, the trunk will automatically activate.
l If more than four ports attached to the same target switch have LACP enabled, the additional ports enter standby mode and will only be enabled if one
of the active links fails.
l STP, VLAN, and IGMP settings can only be made for the entire trunk through the specified port-channel.
To add a port to a static trunk, click the Static toggle button below the port number until the correct trunk number appears. To make a port available for an
LACP trunk, click the LACP toggle button below the port number until an L appears.
To save any changes you make in this page, click Apply Changes. If you don't want to save the changes, click Refresh.
NOTICE: All ports on both ends of an LACP trunk must be configured for full duplex, either by forced mode or autonegotiation.
NOTICE: All ports participating in a trunk should have the same VLAN and CoS settings.
NOTICE: In order for a port to join an existing trunk through LACP, the port's Flow Control, Speed and Duplex Mode, and Autonegotiation settings must
match those of the existing trunk.