Reference Guide

Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 8.4.2.3 Introduced on the S-Series S50.
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
Configure the number of downstream links in the uplink-state group that are disabled if one upstream link in an uplink-
state group goes down.
S4820T
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
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 8.4.2.3 Introduced on the S-Series S50.
Usage
Information
A user-configurable 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.
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