> # Generation 1 PortChannel Limitations

> This section includes the restrictions on creation and addition of PortChannel members to a PortChannel on Generation 1 hardware:

> - The 32-port 2-Gbps or 1-Gbps switching module.
> - The MDS 9140 and 9120 switches.

> When configuring the host-optimized ports on Generation 1 hardware, the following PortChannel guidelines apply:

> - If you execute the write erase command on a 32-port switching module, and then copy a saved configuration to the switch from a text file that contains the no system default switchport shutdown command, you need to copy the text file to the switch again for the E ports to come up without manual configuration.
> - Any (or all) full line rate port(s) in the Cisco MDS 9100 Series can be included in a PortChannel.
> - The host-optimized ports in the Cisco MDS 9100 Series are subject to the same PortChannel rules as 32-port switching modules; only the first port of each group of 4 ports is included in a PortChannel.
> - You can configure only the first port in each 4-port group as an E port (for example, the first port in ports 1–4, the fifth port in ports 5–8, and so on). If the first port in the group is configured as a PortChannel, the other three ports in each group (ports 2–4, 6–8, and so on) are not usable and remain in the shutdown state.
> - If any of the other three ports are configured in a no shutdown state, you cannot configure the first port to be a PortChannel. The other three ports continue to remain in a no shutdown state.

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