Bridge Hello Time - Alcatel-Lucent OmniSwitch 6850-48 Cli Reference Manual

Distributed Spanning Tree Commands

bridge hello time

Configures the Spanning Tree hello time value for the flat mode Common and Internal Spanning Tree
(CIST) instance or for a 1x1 mode VLAN instance. This value specifies the amount of time, in seconds,
between each transmission of a BPDU on any port that is the Spanning Tree root or is attempting to
become the Spanning Tree root.
bridge [instance] hello time seconds
Syntax Definitions
instance
seconds
Defaults
By default, the bridge hello time value for is set to 2 seconds.
parameter
instance
Platforms Supported
OmniSwitch 6400, 6850, 6850E, 6855, 9000E
Usage Guidelines
•
Lowering the Hello Time interval improves the robustness of the Spanning Tree Algorithm. Increasing
the Hello Time interval lowers the overhead of the Spanning Tree Algorithm.
•
Specifying an instance number with this command when the switch is running in the 1x1 Spanning
Tree mode implies a VLAN ID and configures the hello time value for the associated VLAN instance.
•
To configure the hello time value for the flat mode CIST instance when the switch is running in either
the flat or 1x1 mode, do not specify an instance number. The CIST is the instance configured by
default with this command.
•
If the switch is running in the flat mode and STP or RSTP is the active protocol, entering 1 to specify
the CIST instance is optional. If MSTP is the active protocol, however, entering 1 for the instance
number is not accepted.
•
Note that for Multiple Spanning Tree Instances (MSTI), the hello time value is inherited from the CIST
instance and is not a configurable parameter.
Examples
-> bridge mode flat
-> bridge hello time 5
-> bridge mode 1x1
-> bridge 10 hello time 8
-> bridge hello time 5
OmniSwitch CLI Reference Guide
The flat mode CIST instance or an existing VLAN ID number (1–4094).
Hello Time value, in seconds (1–10).
default
flat mode instance
June 2012 page 7-31