Distributed Spanning Tree Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 16-83
bridge cist slot/port mode
Configures Manual mode (forwarding or blocking) or Dynamic mode to manage the state of a port or an
aggregate of ports for the flat mode Common and Internal Spanning Tree (CIST) instance. Dynamic mode
defers the management of the port state to the Spanning Tree algorithm.
bridge cist {slot/port | logical_port} mode {dynamic | blocking | forwarding}
Syntax Definitions
slot/port Enter the slot number for the module and the physical port number on
that module (e.g., 3/1 specifies port 1 on slot 3).
logical_port Link aggregate ID number (0–31).
dynamic Port state is determined by Spanning Tree algorithm.
blocking Sets port state to blocking.
forwarding Sets port state to forwarding.
Defaults
By default, the port Spanning Tree mode is set to dynamic.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
• This command is an explicit Spanning Tree command that only applies to the port Spanning Tree mode
for the CIST instance regardless of which operating mode (flat or 1x1) is active on the switch.
• If the switch is running in 1x1 mode when this command is used, the specified port mode is not active
for the CIST instance until the operating mode for the switch is changed to the flat mode.
• Note that when a configuration snapshot is taken of the switch, all Spanning Tree commands are saved
in their explicit format.
• Ports manually configured to operate in a forwarding or blocking state do not participate in the Span-
ning Tree algorithm.
• When port state is manually set to forwarding or blocking, the port remains in that state until it is
changed using this command.
Examples
-> bridge mode flat
-> bridge cist 4/1 mode forwarding
-> bridge cist 10 mode blocking
-> bridge mode 1x1
-> bridge cist 2/2 mode blocking
-> bridge cist 11 mode forwarding
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