Cisco SGE2000 Reference Guide - Page 171
Default Path Cost, Designated Bridge ID
![]() |
View all Cisco SGE2000 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 171 highlights
Chapter SGE2000/SGE2000P Gigabit Ethernet Switch Reference Guide 10 optimizes the STP protocol convergence. STP convergence can take 30-60 seconds in large networks. • Enable Root Guard - Enable the prevention of a devices outside the network core from being assigned the spanning tree root. • Port State - Displays the current STP state of a port. If enabled, the port state determines what forwarding action is taken on traffic. Possible port states are: - Disabled - Indicates that STP is currently disabled on the port. The port forwards traffic while learning MAC addresses. - Blocking - Indicates that the port is currently blocked and cannot forward traffic or learn MAC addresses. Blocking is displayed when Classic STP is enabled. - Listening - Indicates that the port is in Listening mode. The port cannot forward traffic nor can it learn MAC addresses. - Learning - Indicates that the port is in Learning mode. The port cannot forward traffic, however it can learn new MAC addresses. - Forwarding - Indicates that the port is in Forwarding mode. The port can forward traffic and learn new MAC addresses. • Speed - Indicates the speed at which the port is operating. • Path Cost - Indicates the port contribution to the root path cost. The path cost is adjusted to a higher or lower value, and is used to forward traffic when a path being rerouted. • Default Path Cost - Indicates the default path cost. • Priority - Priority value of the port. The priority value influences the port choice when a bridge has two ports connected in a loop. The priority value is between 0 -240. The priority value is provided in increments of 16. • Designated Bridge ID - Indicates the bridge priority and the MAC Address of the designated bridge. • Designated Port ID - Indicates the selected port's priority and interface. • Designated Cost - Indicates the cost of the port participating in the STP topology. Ports with a lower cost are less likely to be blocked if STP detects loops. • Forward Transitions - Indicates the number of times the port has changed from the Blocking state to Forwarding state. • LAG - Displays the LAG of which this port is a member, if relevant. If a port is a member of a LAG, the LAG settings override the port settings. 3. Define the relevant fields. 4. Click Apply. The interface settings are modified, and the device is updated. Chapter 10: Configuring Spanning Tree 163 Defining Interface Settings
![](/manual_guide/products/cisco-sge2000-reference-guide-209132b/171.png)