Brocade Communications Systems 53-1002163-02 STP, RSTP, and Mstp configuration and management

7 STP, RSTP, and MSTP configuration and management

Table 17 lists the switch defaults that apply only to MSTP configurations.

TABLE 17	Default MSTP configuration
Parameter		Default setting
Cisco interoperability		Disabled
Switch priority (when mapping a VLAN to an		32768
MSTP instance)
Maximum hops		20 hops
Revision number		0

Table 18 lists the switch defaults for the 10-Gigabit Ethernet CEE interface-specific configuration.

TABLE 18	Default 10-Gigabit Ethernet CEE interface-specific configuration
Parameter		Default setting
Spanning tree		Disabled on the interface
Automatic edge detection		Disabled
Path cost		2000
Edge port		Disabled
Guard root		Disabled
Hello time		2 seconds
Link type		Point-to-point
Port fast		Disabled
Port priority		128
CEE interface root port		Allow the CEE interface to become a root port.
CEE interface BPDU restriction		Restriction is disabled

STP, RSTP, and MSTP configuration and management

NOTE

You need to enter either the copy running-configstartup-configcommand or the write memory command to save your configuration changes to Flash so that they are not lost if there is a system reload or power outage.

Enabling STP, RSTP, or MSTP

You enable STP to detect or avoid loops. STP is not required in a loop-free topology. You must turn off one form of STP before turning on another form. By default, STP, RSTP, and MSTP are not enabled.

To enable xSTP, perform the following steps from privileged EXEC mode.

1.Enter the configure terminal command to access global configuration mode.

2.Enter the protocol command to enable STP, RSTP, or MSTP.

64	Converged Enhanced Ethernet Administrator’s Guide
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