Converged Enhanced Ethernet Administrator's Guide v6.4.0 (53-1001761-01, June 2010)

Converged Enhanced Ethernet Administrator’s Guide 53

53-1001761-01

STP, RSTP, and MSTP configuration and management

DRAFT: BROCADE CONFIDENTIAL

Specifying the bridge maximum aging time

In any mode (STP, RSTP, or MSTP), use this command to control the maximum length of time that

passes before an interface saves its Bridge Protocol Data Unit (BPDU) configuration information.

When configuring the maximum aging time, the max-age setting must be greater than the

hello-time setting. The range is 6 through 40 seconds. The default is 20 seconds. The following

relationship should be kept:

2*(forward_delay - 1)>=max_age>=2*(hello_time + 1)

To specify the bridge maximum aging time, 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.

switch(config)#protocol spanning-tree stp

3. Specify the bridge maximum aging time.

switch(conf-stp)##max-age 25

Enabling the error disable timeout timer

In any mode (STP, RSTP, or MSTP), use this command to enable the timer to bring a port out of the

disabled state. When the STP BPDU guard disables a port, the port remains in the disabled state

unless the port is enabled manually. This command allows you to enable the port from the disabled

state. For details on configuring the error disable timeout interval, see “Specifying the error disable

timeout interval” on page 53.

To enable the error disable timeout timer, perform the following steps from Privileged EXEC mode.

By default, the timeout feature is disabled.

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

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

switch(config)#protocol spanning-tree stp

3. Enable the error disable timeout timer.

switch(conf-stp)#error-disable-timeout enable

Specifying the error disable timeout interval

In any mode (STP, RSTP, or MSTP), use this command to specify the time in seconds it takes for an

interface to time out. The range is 10 through 1000000 seconds. The default is 300 seconds. By

default, the timeout feature is disabled.

To specify the time in seconds it takes for an interface to time out, 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.

switch(config)#protocol spanning-tree stp

3. Specify the time in seconds it takes for an interface to time out.

switch(conf-stp)#error-disable-timeout interval 60