Chapter 18: Aggregating Ports - Cisco ESW 500 Administration Manual

Aggregating Ports
Aggregating Ports
ESW 500 Series Switches Administration Guide
EtherChannels optimize port usage by linking a group of ports together to form a
single aggregated group. EtherChannels multiply the bandwidth between the
devices, increase port flexibility, and provide link redundancy.
The device supports both static EtherChannels and Link Aggregation Control
Protocol (LACP) EtherChannels. LACP EtherChannels negotiate aggregating port
links with other LACP ports located on a different device. If the other device ports
are also LACP ports, the devices establish a EtherChannel between them. Ensure
the following:
•
All ports within a EtherChannel must be the same media type.
•
A VLAN is not configured on the port.
•
The port is not assigned to a different EtherChannel.
•
Auto-negotiation mode is not configured on the port.
•
The port is in full-duplex mode.
•
All ports in the EtherChannel have the same ingress filtering and tagged
modes.
•
All ports in the EtherChannel have the same back pressure and flow control
modes.
•
All ports in the EtherChannel have the same priority.
•
All ports in the EtherChannel have the same transceiver type.
•
The device supports up to 64 EtherChannels, and eight ports in each
EtherChannel.
•
Ports can be configured as LACP ports only if the ports are not part of a
previously configured EtherChannel.
•
Ports added to a EtherChannel lose their individual port configuration. When
ports are removed from the EtherChannel, the original port configuration is
applied to the ports.
This section contains information for configuring ports and contains the following
topics:
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