Dell PowerConnect B-RX - Default STP Bridge and Port Parameters

328 BigIron RX Series Configuration Guide
53-1002253-01
IEEE 802.1D Spanning Tree Protocol (STP)
12
NOTE
When you configure a VLAN, the VLAN inherits the global STP settings. However, once you begin to
define a VLAN, you can no longer configure standard STP parameters globally using the CLI. From
that point on, you can configure STP only within individual VLANs.
To enable STP for all ports in all VLANs on a device, enter the following command.
BigIron RX(config)# spanning-tree
This command enables a separate spanning tree in each VLAN, including the default VLAN.
Syntax: [no] spanning-tree
Enabling or disabling STP on a VLAN
Use the following procedure to disable or enable STP on a device on which you have configured a
VLAN. Changing the STP state in a VLAN affects only that VLAN.
To enable STP for all ports in a port-based VLAN, enter commands such as the following.
BigIron RX(config)# vlan 10
BigIron RX(config-vlan-10)# spanning-tree
Syntax: [no] spanning-tree
Enabling or disabling STP on a port
Use the following procedure to disable or enable STP on an individual port.
NOTE
If you change the STP state of the primary port in a trunk group, the change affects all ports in the
trunk group.
To enable STP on an individual port, enter commands such as the following.
BigIron RX(config)# interface 1/1
BigIron RX(config-if-e1000-1/1)# spanning-tree
Syntax: [no] spanning-tree
Default STP bridge and port parameters
Table 72 lists the default STP bridge parameters. The bridge parameters affect the entire spanning
tree. If you are using MSTP, the parameters affect the VLAN. If you are using SSTP, the parameters
affect all VLANs that are members of the single spanning tree.
TABLE 72 Default STP bridge parameters
Parameter Description Default and valid values
Forward Delay The period of time a bridge will wait (the listen and learn
period) before beginning to forward data packets.
15 seconds
Possible values: 4 – 30
seconds
Maximum Age The interval a bridge will wait for a hello packet from the
root bridge before initiating a topology change.
20 seconds
Possible values: 6 – 40
seconds