Displaying Global Settings
10-3
10
Displaying Global Settings
You can display a summary of the current bridge STA information that applies to the
entire switch using the STA Information screen.
Field Attributes
•
Spanning Tree
State
– Shows if the switch is enabled to participate in an
STA-compliant network.
•
Bridge ID
– A unique identifier for this bridge, consisting of the bridge priority, the
MST Instance ID 0 for the Common Spanning Tree when spanning tree mode is
set to MSTP (page 10-6), and MAC address (where the address is taken from the
switch system).
•
Max Age
– The maximum time (in seconds) a device can wait without receiving a
configuration message before attempting to reconfigure. All device ports (except
for designated ports) should receive configuration messages at regular intervals.
Any port that ages out STA information (provided in the last configuration
message) becomes the designated port for the attached LAN. If it is a root port, a
new root port is selected from among the device ports attached to the network.
(References to “ports” in this section mean “interfaces,” which includes both ports
and trunks.)
•
Hello Time
– Interval (in seconds) at which the root device transmits a
configuration message.
•
Forward Delay
– The maximum time (in seconds) the root device will wait before
changing states (i.e., discarding to learning to forwarding). This delay is required
because every device must receive information about topology changes before it
starts to forward frames. In addition, each port needs time to listen for conflicting
information that would make it return to a discarding state; otherwise, temporary
data loops might result.
•
Designated Root
– The priority and MAC address of the device in the Spanning
Tree that this switch has accepted as the root device.
-
Root Port
– The number of the port on this switch that is closest to the root. This
switch communicates with the root device through this port. If there is no root
port, then this switch has been accepted as the root device of the Spanning Tree
network.
-
Root Path Cost
– The path cost from the root port on this switch to the root
device.
•
Configuration Changes
– The number of times the Spanning Tree has been
reconfigured.
•
Last Topology Change
– Time since the Spanning Tree was last reconfigured.
These additional parameters are only displayed for the CLI:
•
Spanning tree mode
– Specifies the type of spanning tree used on this switch:
-
STP
: Spanning Tree Protocol (IEEE 802.1D)
-
RSTP
: Rapid Spanning Tree (IEEE 802.1w)
-
MSTP
: Multiple Spanning Tree (IEEE 802.1s)
Summary of Contents for 8926EM
Page 6: ...ii ...
Page 34: ...Getting Started ...
Page 44: ...Introduction 1 10 1 ...
Page 62: ...Initial Configuration 2 18 2 ...
Page 64: ...Switch Management ...
Page 76: ...Configuring the Switch 3 12 3 ...
Page 118: ...Basic Management Tasks 4 42 4 ...
Page 164: ...User Authentication 6 28 6 ...
Page 176: ...Access Control Lists 7 12 7 ...
Page 284: ...Quality of Service 14 8 14 ...
Page 294: ...Multicast Filtering 15 10 15 ...
Page 300: ...Domain Name Service 16 6 16 ...
Page 310: ...Dynamic Host Configuration Protocol 17 10 17 ...
Page 320: ...Configuring Router Redundancy 18 10 18 ...
Page 344: ...IP Routing 19 24 19 ...
Page 356: ...Unicast Routing 20 12 20 Web Click Routing Protocol RIP Statistics Figure 20 5 RIP Statistics ...
Page 386: ...Unicast Routing 20 42 20 ...
Page 388: ...Command Line Interface ...
Page 400: ...Overview of the Command Line Interface 21 12 21 ...
Page 466: ...SNMP Commands 24 16 24 ...
Page 520: ...Access Control List Commands 26 18 26 ...
Page 546: ...Rate Limit Commands 30 2 30 ...
Page 612: ...VLAN Commands 34 24 34 ...
Page 626: ...Class of Service Commands 35 14 35 ...
Page 670: ...DHCP Commands 39 16 39 ...
Page 716: ...IP Interface Commands 41 36 41 ...
Page 768: ...IP Routing Commands 42 52 42 ...
Page 770: ...Appendices ...
Page 791: ......