Alcatel-Lucent 6850-48 Guida Di Riferimento

Distributed Spanning Tree Commands

OmniSwitch CLI Reference Guide

page 15-83

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}

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).

Link aggregate ID number (0–31).

Port state is determined by Spanning Tree algorithm.

Sets port state to blocking. 

Sets port state to forwarding. 

By default, the port Spanning Tree mode is set to dynamic.

OmniSwitch 6400, 6850, 6855, 9000, 9000E

• 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.

-> 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