Cisco Catalyst 2960 Series, Configuration Manual

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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 342
EtherChannel Configuration Guidelines, on page 338
Default EtherChannel Configuration, on page 337
Layer 2 EtherChannel Configuration Guidelines, on page 340
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
325
Information About EtherChannels