•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.
Z9500
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 Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
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.
1818 Uplink Failure Detection (UFD)