User's Manual
Table Of Contents
- 1. Getting started
- 2. Introduction
- 3. Preparation
- 4. About the terminal
- 5. Mounting and installing the terminal
- 6. Connecting to the terminal
- 7. Managing the terminal
- 8. Configuring the terminal
- 9. Configuring the traffic interfaces
- 10. Cross Connections
- Embedded cross connect switch
- The Cross Connections application
- The Cross Connections system requirements
- Installing the Cross Connections application
- Opening the Cross Connections application
- The Cross Connections page
- Setting the terminal's address
- Management and user ethernet capacity
- Setting card types
- Getting cross connection configuration from the terminals
- Creating cross connections
- Sending cross connection configuration to the terminals
- Saving cross connection configurations
- Using existing cross connection configurations
- Printing the cross connection configuration
- Deleting cross connections
- Configuring the traffic cross connections
Configuring the traffic interfaces | 83
4. Select the Priority Queue Scheduling.
There are two methods for transmitting the Ethernet traffic queues across the link:
Strict: the queue is transmitted based on the priority. The first queue transmitted is the highest
priority queue and the terminal will not transmit any other traffic from any other queue until the
highest priority queue is empty. Then the next highest priority queue is transmitted, and so on.
Weighted (default): each of the queues will transmit a number of packets based on a
weighting. The following table shows how the weighting is applied to each queue.
Queue Priority Number of packets transmitted
Queue 3 Highest Priority 8 packets
Queue 2 4 packets
Queue 1 2 packets
Queue 0 Lowest Priority 1 packets
5. Select the IEEE 802.1 Priority Queue Mapping.
This determines the standard (or scheme) used for prioritizing traffic into one of four queues
numbered 0 to 3 (3 being the highest priority queue).
There are two possible methods for queuing the ethernet traffic. One is based on the IEEE 802.1D
standard (which is the default setting), and the other is based on the Cisco-proprietary method.
The following table shows how traffic is queued using the two methods:
Output Queue
Priority Traffic Type Cisco
Priority Queuing
IEEE 802.1D
Priority Queuing
0 (default) Best Effort 0 1
1 Background 0 0
2 Spare 1 0
3 Excellent Effort 1 1
4 Controlled Load 2 2
5 ‘Video’ < 100ms latency and jitter 2 2
6 ‘Video’ < 10ms latency and jitter 3 3
7 Network Control 3 3