Configuration Guidelines for UFD

Below is a list of configuration guidelines to be followed for UFD. These are applicable only to blade switches where there is a clear distinction between downlink and uplink ports.

  1. UFD is required only when uplink-path redundancy is not available on the blade switches.

  2. An LtM can be either one or more uplink ports or one or more multi-link trunk group of uplink ports.

  3. Ports that are already members of a trunk group are not allowed to be assigned to an LtM or LtD.

  4. A trunk group configured as an LtM can contain multiple uplink ports, but no downlink ports or ISL (Inter-Switch-Link) ports.

  5. A port cannot be added to a trunk group if it already belongs to an LtM or LtD.

  6. An LtD can contain one or more ports, and/or one or more trunks

  7. A trunk group configured as an LtD can contain multiple downlink ports, but no uplink ports or ISL (Inter-Switch-Link) ports.

A common API will be provided for higher layers, like CLI and SNMP, which will determine if a port-list can be an LtM or LtD. The API will handle the platform specific details and ensure a uniform code flow for blade and other switch families.

Switches do not have a clear distinction between uplink and downlink ports so some of the points listed above may not be applicable.