Chapter 5
Setup and Configuration
RUGGEDCOM ROS
User Guide
180
Clearing Spanning Tree Protocol Statistics
Parameter
Description
as negotiated (20,000 for 1Gbps, 200,000 for 100 Mbps links and
2,000,000 for 10 Mbps links).
For MSTP, this parameter applies to both external and internal
path cost.
5. Click
Apply
.
Section 5.2.10
Clearing Spanning Tree Protocol Statistics
To clear all spanning tree protocol statistics, do the following:
1. Navigate to
Spanning Tree
»
Clear Spanning Tree Statistics
. The
Clear Spanning Tree Statistics
form
appears.
1
Figure 106: Clear Spanning Tree Statistics Form
1.
Confirm Button
2. Click
Confirm
.
Section 5.3
Managing Classes of Service
Classes of Service (CoS) provides the ability to expedite the transmission of certain frames and port traffic over
others. The CoS of a frame can be set to Normal, Medium, High, or Critical. By default, other than the control
frames, RUGGEDCOM ROS enforces Normal CoS for all incoming traffic received without a priority tag.
IMPORTANT!
Use the highest supported CoS with caution, as it is always used by the switch for handling network
management traffic, such as RSTP BPDUs.
If this CoS is used for regular network traffic, upon traffic bursts, it may result in the loss of some
network management frames, which in turn may result in the loss of connectivity over the network.
The process of controlling traffic based on CoS occurs over two phases:
1.
Inspection Phase
In the inspection phase, the CoS priority of a received frame is determined from either:
• A specific CoS based upon the source and destination MAC address (as set in the Static MAC Address Table)
• The priority field in the IEEE 802.1Q tags
