Distributed Spanning Tree Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 16-37
bridge cist max age
Configures the bridge max age time value for the flat mode Common and Internal Spanning Tree (CIST)
instance. This value is the amount of time, in seconds, that Spanning Tree Protocol information learned
from the network on any port is retained. When this information has aged beyond the max age value, the
information is discarded.
bridge cist max age seconds
Syntax Definitions
seconds Max age time in seconds (6–40).
Defaults
By default, the bridge max age time value is set to 20 seconds.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
• A low max age time causes the Spanning Tree Algorithm to reconfigure more often.
• This command is an explicit Spanning Tree command that only applies to the CIST instance regard-
less of which operating mode (flat or 1x1) or protocol is active on the switch.
• If the switch is running in 1x1 mode when this command is used, the specified max age time value 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.
Examples
-> bridge mode flat
-> bridge cist max age 10
-> bridge cist max age 30
-> bridge mode 1x1
-> bridge cist max age 10
-> bridge cist max age 30
Release History
Release 6.6.1; command was introduced.
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