> # General Guidelines and Limitations

> Cisco MDS 9000 Family switches support the following number of PortChannels per switch:

> - Switches with only Generation 1 switching modules do not support F and TF PortChannels.
> - Switches with Generation 1 switching modules, or a combination of Generation 1 and Generation 2 switching modules, support a maximum of 128 PortChannels. Only Generation 2 ports can be included in the PortChannels.
> - Switches with only Generation 2 switching modules or Generation 2 and Generation 3 modules support a maximum of 256 PortChannels with 16 interfaces per PortChannel.
> - A PortChannel number refers to the unique identifier for each channel group. This number ranges from of 1 to 256.

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