Converged Enhanced Ethernet Administrator’s Guide 67
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STP, RSTP, and MSTP configuration and management 7
DRAFT: BROCADE CONFIDENTIAL
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 specify the time in seconds required for
the timer to expire. 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 page67. By default, the timeout feature is disabled.
To enable the error disable timeout timer, 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. 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
Specifying the port-channel path cost
In any mode (STP, RSTP, or MSTP), use this command to specify the port-channel path cost. The
default port cost is standard. The path cost options are:
•custom—Specifies that the path cost changes according to the port-channel’s bandwidth.
•standard—Specifies that the path cost does not change according to the port-channel’s
bandwidth.