Restrictions for EtherChannels
The following are restrictions for EtherChannels:
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All ports in an EtherChannel must be assigned to the same VLAN or they must be configured as trunk port.
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The LACP 1:1 redundancy feature is supported on port channel interfaces only.
Unsupported EtherChannel features:
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You cannot configure a voice VLAN on a port channel or a member interface.
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You cannot convert an interface to an ether channel if dot1ad is configured on the interface.
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You cannot configure nonegotiate and dynamic commands on a port channel.
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You cannot configure pruning VLAN if MVRP feature is already configured on the device.
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You cannot configure network policy commands on a routed or trunk port and on an ether channel.
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You can configure the rep segment command only on switch port mode trunk.
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You cannot configure switchport priority extend trust command and switchport priorit extend cos 3 command on an etherchannel.
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You cannot configure platform qos low-latency command on an interface port-channel 10.
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You cannot use Layer 2 configurations on a Layer 3 port.
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When there are any misconfigurations detected in a port mode or VLAN mask, the ports are suspended.
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On Cisco Catalyst 9600 Series Supervisor 2 Module EtherChannel member port selection is software based in Layer 2 and Layer 3 multicast route. This means that all multicast traffic under a group will be routed via the same physical port of the EtherChannel. As a result, the distribution of multicast traffic load balance over etherchannels might not evenly spread across member ports.