Deployment Guide

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)
Command History
Version Description
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.
enable
Re-enable upstream-link tracking for an uplink-state group after it has been disabled.
Syntax
enable
To disable upstream-link tracking without deleting the uplink-state group, use the no enable command.
group-id Enables debugging on the specied uplink-state group. Valid group-id values are 1 to 16.
Defaults Upstream-link tracking is automatically enabled in an uplink-state group.
Command Modes UPLINK-STATE-GROUP
Supported Modes All Modes
Command History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
414 Uplink Failure Detection (UFD)