Channel-Group - Cisco 4500M Command Reference Manual

channel-group

channel-group
To assign and configure an EtherChannel interface to an EtherChannel group, use the channel-group
command. To remove a channel group configuration from an interface, use the no form of this command.
Syntax Description
number
mode
active
on
auto
non-silent
passive
desirable
Defaults
No channel groups are assigned.
Command Modes
Interface configuration
Command History Release
12.1(8a)EW
12.1(13)EW
Usage Guidelines
You do not have to create a port channel interface before assigning a physical interface to a channel
group. If a port channel interface has not been created, it is automatically created when the first physical
interface for the channel group is created.
If a specific channel number is used for the PAgP-enabled interfaces of a channel group, that same
channel number cannot be used for configuring a channel that has LACP-enabled interfaces or vice
versa.
You can also create port channels by entering the
Layer 3 port channel. To change the Layer 3 port channel into a Layer 2 port channel, use the
command before you assign physical interfaces to the channel group. A port channel cannot be changed
from Layer 3 to Layer 2 or vice versa when it contains member ports.
You do not have to disable the IP address that is assigned to a physical interface that is part of a channel
group, but we recommend that you do so.
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
2-14
channel-group number mode {active | on | auto [non-silent ]} | {passive | desirable [non-silent ]}
no channel-group
Specifies the channel group number; valid values are from 1 to 64.
Specifies the EtherChannel mode of the interface.
Enables LACP unconditionally.
Forces the port to channel without PAgP.
Places a port into a passive negotiating state, in which the port responds to PAgP
packets it receives but does not initiate PAgP packet negotiation.
(Optional) Used with the auto or desirable mode when traffic is expected from the
other device.
Enables LACP only if an LACP device is detected.
Places a port into an active negotiating state, in which the port initiates negotiations
with other ports by sending PAgP packets.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Support for LACP was added.
Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches
interface port-channel command. This will create a
switchport
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