Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 422)

1. Enter the configure terminal command to change to global configuration mode.
switch# configure terminal
2. Enter the protocol command to enable STP, RSTP, MSTP, PVST+, or R-PVST+.
switch(config)# protocol spanning-tree stp
3. Specify the bridge maximum aging time.
switch(conf-stp)# max-age 25
4. Specify the bridge maximum aging time for a specific VLAN.
switch(conf-stp)# max-age 25 vlan 10
Specifying the bridge hello time
In STP, RSTP, MSTP, PVST+, or R-PVST+ mode, use the hello-time command to configure the
bridge hello time. The hello time determines how often the switch interface broadcasts hello BPDUs to
other devices. The range is from 1 through 10 seconds. The default is 2 seconds.
When configuring the hello time, you must set the max-age to be greater than the hello time. The
following relationship should be kept:
2*(forward_delay - 1) ≥ max_age ≥ 2*(hello_time + 1)
Additionally, you may specify the hello time for a specific VLAN. If the VLAN parameter is not
provided, the priority value is applied globally for all per-VLAN instances. However, for the VLANs that
have been configured explicitly, the per-VLAN configuration takes precedence over the global
configuration.
NOTE
On the Brocade VDX 8770, the VLAN value can be 1 through 4086. VLAN IDs 4087 through 4094 are
internally-reserved VLAN IDs. On all other Brocade VDX switches, the VLAN value can be 1
through 3962, as 3963 through 4094 are reserved.
To specify the bridge hello time, perform the following steps from privileged EXEC mode.
1. Enter the configure terminal command to change to global configuration mode.
switch# configure terminal
2. Enter the protocol command to enable STP, RSTP, MSTP, PVST+, or R-PVST+.
switch(config)# protocol spanning-tree stp
3. Specify the time range in seconds for the interval between the hello BPDUs sent on an interface.
switch(conf-stp)# hello-time 5
4. Specify the time range in seconds for the interval between the hello BPDUs sent on an interface for
a specific VLAN.
switch(conf-stp)# hello-time 5 vlan 10
5. Return to privileged EXEC mode.
switch(config)# end
6. Enter the copy command to save the running-config file to the startup-config file.
switch# copy running-config startup-config
Configuring STP timers
You must configure the error disable timeout timer before you can use it.
Enabling the error disable timeout timer
In STP, RSTP, MSTP, PVST+, or R-PVST+ mode, use the error-disable-timeout command to enable
a timer that will 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
Specifying the bridge hello time
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