Guidelines And Limitations; General Guidelines And Limitations; Generation 1 Portchannel Limitations; F And Tf Portchannel Limitations - Cisco MDS 9000 Series Configuration Manual

Guidelines and Limitations

Guidelines and Limitations

General Guidelines and Limitations

Cisco MDS 9000 Series Multilayer 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
• Switches with only Generation 2 switching modules or Generation 2 and Generation 3 modules support
• A PortChannel number refers to the unique identifier for each channel group. This number ranges from

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
• 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

F and TF PortChannel Limitations

The following guidelines and restrictions are applicable for F and TF PortChannels:
• The ports must be in F mode.
• Automatic creation is not supported.
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
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switching modules, support a maximum of 128 PortChannels. Only Generation 2 ports can be included
in the PortChannels.
a maximum of 256 PortChannels with 16 interfaces per PortChannel.
of 1 to 256.
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.
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.
Configuring PortChannels