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.
UFD enable/disable
uplink-failure-detection
Syntax
uplink-failure-detection
Description
Used to globally enable UFD. The [no] option globally disables UFD.
UFD configuration
uplink-failure-detection track
Syntax
uplink-failure-detection track <track_ID> links-to-monitor <port-list> links-to-disable <port-list>
delay <delay_value>
no uplink-failure-detection track <track_ID> links-to-monitor <port-list> links-to-disable <port-list>
delay <delay_value>
Description
Configures LtM and LtD ports for track-id. UFD delay is configured in seconds until when uplink must remain in a
stable state before restoring the downlink. UFD delay is configurable between 0 to 300 seconds. The default
delay value is 0.
The no form of this command resets the parameter.
Chapter 3 Port Status and Configuration 101
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