Distributed Spanning Tree Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 16-89
bridge cist slot/port connection
Configures the connection type for a port or an aggregate of ports for the flat mode Common and Internal
Spanning Tree (CIST).
bridge cist {slot/port | logical_port} connection {noptp | ptp | autoptp | edgeport}
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).
noptp Defines port connection type as no point to point link.
ptp Defines port connection type as point to point link.
autoptp Specifies that switch software will automatically define connection type
as point to point or no point to point.
edgeport This parameter is currently not supported. Use the bridge cist slot/port
admin-edge or bridge cist slot/port auto-edge command to configure
edge port status.
Defaults
By default, the link connection type is set to auto point to point.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
• This command is an explicit Spanning Tree command that only applies to the port connection type 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 connection type 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.
• A port is considered connected to a point to point LAN segment if the port belongs to a link aggregate
of ports or if autonegotiation determines the port should run in full duplex mode or if full duplex mode
was administratively set. Otherwise, the port is considered connected to a no point to point LAN
segment.
• Rapid transition of a designated port to forwarding can only occur if the port’s connection type is
defined as a point to point or an edge port. Rapid transition of an alternate port role to a root port role is
not affected by the port connection type definition.
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