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Configuring STP Port Parameters
Commands
spantree cist auto-edge
spantree vlan auto-edge
spantree cist restricted-role
spantree vlan restricted-role
spantree cist restricted-tcn
spantree vlan restricted-tcn
spantree cist txholdcount
spantree vlan txholdcount
spantree pvst+compatibility
The following sections provide information and procedures for using Spanning Tree port
configuration commands and also includes command examples.
Enabling/Disabling Spanning Tree on a Port
Spanning Tree is automatically enabled on all eligible ports. When Spanning Tree is disabled on a port, the
port is put in a forwarding state for the specified instance. For example, if a port is associated with both
VLAN 10 and VLAN 20 and Spanning Tree is disabled on the port for VLAN 20, the port state is set to
forwarding for VLAN 20. However, the VLAN 10 instance still controls the port state as it relates to
VLAN 10. This example assumes the switch is running in the per-VLAN Spanning Tree mode.
If the switch is running in the flat Spanning Tree mode, then disabling the port Spanning Tree status
applies across all VLANs associated with the port. The flat mode instance is specified as the instance
associated with the port, even if the port is associated with multiple VLANs.
To change the port Spanning Tree status for a VLAN instance regardless of which mode (per-VLAN or
flat) is active for the switch, use the
enable Spanning Tree on port 8/1 for VLAN 10 and disable STP on port 6/2 for VLAN 20:
-> spantree vlan 10 port 8/1 enable
-> spantree vlan 20 port 6/2 disable
To change the port Spanning Tree status for the flat mode instance, use the
that this command is available when the switch is running in either mode (per-VLAN or flat). For exam-
ple, the following command disables the Spanning Tree status on port 1/24 for the flat mode instance:
-> spantree cist port 1/24 disable
page 5-34
Used for ...
Configures a port or an aggregate of ports for the flat mode Com-
mon and Internal Spanning Tree (CIST) as an edge port, automati-
cally.
Configures a port or an aggregate of ports for the per-VLAN mode
VLAN instance as an edge port, automatically.
Configures the restricted role status for a port or an aggregate of
ports for the flat mode Common and Internal Spanning Tree
(CIST) as a restricted role port.
Configures a port or an aggregate of ports for the per-VLAN mode
VLAN instance as a restricted role port.
Configures a port or an aggregate of ports for the flat mode Com-
mon and Internal Spanning Tree (CIST) to support the restricted
TCN capability.
Configures a port or an aggregate of ports for the per-VLAN mode
VLAN instance to support the restricted TCN capability.
Limits the transmission of BPDU through a given port for the flat
mode Common and Internal Spanning Tree (CIST).
Limits the transmission of BPDU through a given port for the per-
VLAN mode VLAN instance.
Configures the type of BPDU to be used on a port when PVST+
mode is enabled.
spantree vlan
command. For example, the following commands
OmniSwitch AOS Release 7 Network Configuration Guide
Configuring Spanning Tree Parameters
spantree cist
command. Note
March 2011
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