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Stacking
All commands in this chapter are specific to the Dell EMC Networking OS.
You can use the commands to pre-configure a switch, so that the configuration settings are invoked when the switch is
attached to other S-Series units.
For information about using the S-Series stacking feature, see the Stacking S-Series Switches section in the Dell EMC
Networking OS Configuration Guide.
CAUTION: You cannot enable stacking simultaneously with virtual link trunking (VLT). If you enable both at the
same time, unexpected behavior occurs.
The Dell EMC Networking OS commands for data center bridging features include 802.1Qbb priority-based flow control (PFC),
802.1Qaz enhanced transmission selection (ETS), and the data center bridging exchange (DCBX) protocol.
Switch Stacking and DCB Caveats for the S4820T
The following is a list of behaviors and limitations regarding the use of DCB over S4820T ports involved in switch stacking:
● You can enable DCB only on 40Gig (QSPF+) ports.
● DCB is not supported over any of the 48 RJ-45 10Gig ports while they are configured in Stacking mode.
● You cannot configure stacking on any of the 48 RJ-45 10Gig ports if you enable DCB on any of the 40Gig stacking ports.
● If you enable DCB, it disables the ability to use any of the 48 10Gig ports for stacking.
NOTE:
The terms stack-unit-id, unit-id, stack-unit-number, stack-number, and unit-number
mentioned in this chapter refers to the stack-unit-number.
Topics:
• redundancy disable-auto-reboot
• redundancy force-failover stack-unit
• redundancy protocol
• reset stack-unit
• show redundancy
• show system stack-ports
• stack-unit priority
• stack-unit provision
• stack-unit stack-group
• upgrade system stack-unit
redundancy disable-auto-reboot
Prevent the S-Series stack management unit, stack member unit, and standby unit from rebooting if they fail.
Syntax
redundancy disable-auto-reboot stack-unit [members | 0-11]
To return to the default, use the no redundancy disable-auto-reboot stack-unit command.
Parameters
stack-unit Enter the stack-unit number. For the S4820T, the range is from 0 to 11.
members Enter the keyword members for all stack-units.
Defaults Disabled (the failed switch is automatically rebooted).
Command Modes CONFIGURATION
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