Etherchannel Modes - Cisco Catalyst 2960-XR Configuration Manual

Configuring EtherChannels

EtherChannel Modes

You can configure an EtherChannel in one of these modes: Port Aggregation Protocol (PAgP), Link Aggregation
Control Protocol (LACP), or On. Configure both ends of the EtherChannel in the same mode:
• When you configure one end of an EtherChannel in either PAgP or LACP mode, the system negotiates
with the other end of the channel to determine which ports should become active. If the remote port
cannot negotiate an EtherChannel, the local port is put into an independent state and continues to carry
data traffic as would any other single link. The port configuration does not change, but the port does not
participate in the EtherChannel.
• When you configure an EtherChannel in the on mode, no negotiations take place. The switch forces all
compatible ports to become active in the EtherChannel. The other end of the channel (on the other switch)
must also be configured in the on mode; otherwise, packet loss can occur.
Related Topics
Configuring Layer 2 EtherChannels, on page 123
EtherChannel Configuration Guidelines, on page 120
Default EtherChannel Configuration, on page 119
Layer 2 EtherChannel Configuration Guidelines, on page 122
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Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
EtherChannel Overview
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