10-17
Cisco Catalyst Switch Manager User Guide
OL-4930-01
Chapter 10 Virtual Interface Management
VLAN Management Window
Root Election
The Root Election area provides the following information:
•
Root Preference—STP root priority. This attribute may has following values:
–
none (0)
–
primary (1)
–
secondary (2)
•
Hello Time—Hello-time in seconds.
•
Diameter—Specifies the network diameter (maximum number of bridges between two end nodes).
If specified, the switch will calculate the optimal hello-time, forward-time, and max-age. User may
optionally specify an explicit hello-time.
•
Set Root—Configures the root priority of the device in the VLAN STP instance. This action will set
the VLAN STP bridge-priority and reset the hello-time, forward-delay, and max-age timers. This
action does not guarantee that the switch will be elected the STP root, it only sets these values.
Advanced
The Advanced area allows you to configure the attributes described in this section. While these attributes
are configurable, this is not the recommended method for configuring them. Alternately, if you specify
a network diameter but no hello time, forward-delay timer, or max-age timer, using the Set Root button
(in the Root Election Area) causes the switch to automatically calculate the optimal hello time,
forward-delay timer, and max-age timer for that diameter.
•
Hello Time—Indicates how often the switch broadcasts hello messages to other switches in the STP
domain. If there is no spanning tree instance for the VLAN, value is nil. You can optionally provide
a diameter and hello-time to override the calculated value. If no diameter or hello-time are provided,
the switch will use the default hello time of 2 seconds.
•
Priority—Spanning tree bridge priority. If there is no spanning tree instance for the VLAN, the value
is nil.
•
Forward Delay—Forward delay timer for STP state transitions. Determines how long each of the
listening and learning states will last before the interface begins forwarding. If there is no spanning
tree instance for the VLAN, the value is nil. If no diameter is specified, the switch will use the
default delay of 15 seconds.
•
Max Age—Describes the amount of time that STP protocol information received by a switch is
stored before it expires. If there is no spanning tree instance for the VLAN, the value is nil. If no
diameter is specified, the switch will use the default duration of 20 seconds.
Содержание WS-C3550-12G
Страница 20: ...Contents xx Cisco Catalyst Switch Manager User Guide OL 4930 01 ...
Страница 388: ...11 36 Cisco Catalyst Switch Manager User Guide OL 4930 01 Chapter 11 Routing Management IS IS Management Window ...
Страница 398: ...12 10 Cisco Catalyst Switch Manager User Guide OL 4930 01 Chapter 12 Profile Management Syslog Profile ...
Страница 436: ...A 2 Cisco Catalyst Switch Manager User Guide OL 4930 01 Appendix A Modifying ini Files ...