Deployment Guide

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Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.4(0.0) Supported on the FN I/O Aggregator.
9.2(0.0) Supported on the M I/O Aggregator.
Related Commands
• downstream — assigns a port or port-channel to the uplink-state group as a downstream interface.
• uplink-state-group — creates an uplink-state group and enables the tracking of upstream links.
downstream disable links
Congure the number of downstream links in the uplink-state group that are disabled if one upstream link in an uplink-state group goes
down.
Syntax
downstream disable links {number | all}
To revert to the default setting, use the no downstream disable links command.
Parameters
number Enter the number of downstream links to be brought down by UFD. The range is from 1 to
1024.
all Brings down all downstream links in the group.
Defaults No downstream links are disabled when an upstream link in an uplink-state group goes down.
Command Modes UPLINK-STATE-GROUP
Supported Modes Programmable-Mux (PMUX)
Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.4(0.0) Supported on the FN I/O Aggregator.
9.2(0.0) Supported on the M I/O Aggregator.
Usage Information
A user-congurable number of downstream interfaces in an uplink-state group are put into a link-down state with
an UFD-Disabled error message when one upstream interface in an uplink-state group goes down.
If all upstream interfaces in an uplink-state group go down, all downstream interfaces in the same uplink-state
group are put into a link-down state.
Related Commands
• downstream — assigns a port or port-channel to the uplink-state group as a downstream interface.
• uplink-state-group — creates an uplink-state group and enables the tracking of upstream links.
Uplink Failure Detection (UFD) 1315