Brocade Network OS Command Reference v4.1.0 - Manual (Page 360)

322 Network OS Command Reference
53-1003115-01
hello-time
2
hello-time
Sets the interval between the hello Bridge Protocol Data Units (BPDUs) sent on an interface.
Synopsis hello-time seconds
no hello-time
Operands seconds Specifies the time interval between the hello BPDUs sent on an interface.
Valid values range from 1 through 10 seconds.
Defaults 2 seconds
Command Modes Protocol Spanning Tree configuration mode
Description Use this command to configure the spanning-tree bridge hello time, which determines how often
the device broadcasts hello messages to other devices.
If the VLAN parameter is not provided, the hello-time value is applied globally for all
per-VLAN instances. But for the VLANs which have been configured explicitly, the
per-VLAN configuration takes precedence over the global configuration.
Usage Guidelines When configuring the hello-time, the max-age command setting must be greater than the
hello-time setting. The following relationship should be kept:
2*(forward-delay - 1)>=max-age>=2*(hello-time + 1)
If xSTP is enabled over VCS, this command must be executed on all the RBridge nodes.
Enter no hello-time to return to the default settings.
On the Brocade VDX family of switches, VLANs are treated as interfaces from a configuration point
of view. By default, all the DCB ports are assigned to VLAN 1 (VLAN ID equals 1). Valid VLAN IDs
are as follows:
• On Brocade VDX 8770 switches: 1 through 4086 for 802.1Q VLANs (VLAN IDs 4087
through 4095 are reserved on these switches), and 4096 through 8191 for service or
transport VFs in a Virtual Fabrics context.
On all other
Brocade
VDX switches: 1
through 3962 for
802.1Q VLANs
(VLAN IDs 3963
through 4095 are
reserved on
these switches),
and 4096
through 8191 for
service or
transport VFs in a
Virtual Fabrics
context.Examples
To configure spanning-tree bridge hello time to 5 seconds:
switch(conf-stp)# hello-time 5
See Also forward-delay, max-age