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Configuring Traffic Filters and Protocol Prioritization
1-4
Chapter 4 lists protocol-specific outbound filter criteria and actions. Chapter 7
explains how to use the Configuration Manager to apply outbound filters.
What Is Protocol Prioritization?
As a router operates, network traffic from a variety of sources converges at each
interface. Without protocol prioritization, the router transmits packets in a first-in,
first-out (FIFO) order. By implementing protocol prioritization, you instruct the
router to use a different transmit order for specified ranges of packets.
With protocol prioritization enabled, the router sorts WAN traffic on an individual
interface into three delivery queues of varying precedence, called
priority queues
.
The router then uses a dequeuing allocation algorithm to drain the priority queues
and transmit traffic.
Protocol prioritization is considered an outbound filter mechanism because
• Priority queues affect the sequence in which data leaves an interface; they do
not affect traffic as it enters the router
• You use outbound traffic filters to specify whether and how traffic gets sorted
into queues
• Protocol prioritization supports only WAN protocols
Outbound filters that include a priority queue action are sometimes called
priority
filters
.
Two Types of Site Manager Protocol Prioritization
There are two separate implementations of protocol priority queuing. For WAN
protocols supported by outbound traffic filters, Site Manager supports a high,
normal, and low priority queue at the circuit interface level. The router
automatically queues frames that do not match a traffic filter to the normal queue.
Refer to Chapter 2 to learn more about this basic (circuit-based) priority queuing
and dequeuing.
Note:
Outbound LAN traffic filters do not support protocol prioritization.
- Protocol Prioritization 1
- Bay Networks Software License 3
- Contents 5
- About This Guide 15
- Before You Begin 16
- CompuServe 17
- How to Get Help 18
- Conventions 18
- Acronyms 20
- Chapter 1 21
- Using Traffic Filters 21
- Inbound Traffic Filters 22
- Outbound Traffic Filters 23
- What Do Traffic Filters Do? 25
- Filtering Strategies 26
- Components of Traffic Filters 27
- Predefined Criteria 28
- Using Traffic Filters 29
- User-Defined Criteria 31
- Filtering Actions 32
- Prioritizing Actions 32
- Using Filter Templates 33
- Chapter 2 35
- The Dequeuing Process 36
- Strict Dequeuing Algorithm 40
- Monitoring Statistics 42
- Percent of Bandwidth 43
- Queue Depth 43
- Queue Depth Example 44
- Reconfiguring Queue Depth 44
- Latency = 46
- Bits Queued 46
- Line Speed (bits per second) 46
- 2. Click on Edit Circuit 47
- (Figure 2-10) 50
- Chapter 3 59
- Transparent Bridge Actions 62
- Length (bits) 63
- Source Routing Actions 64
- IP Criteria and Actions 65
- IP Actions 66
- IPX Criteria and Actions 67
- XNS Criteria and Actions 68
- OSI Criteria and Actions 69
- User-Defined OSI Criteria 70
- OSI Actions 70
- Predefined DECnet Criteria 70
- VINES Criteria and Actions 71
- User-Defined VINES Criteria 72
- VINES Actions 72
- DLSw Criteria and Actions 73
- LLC2 Criteria and Actions 74
- Chapter 4 75
- Predefined Data Link Criteria 76
- Predefined IP Criteria 78
- Data Link Reference Points 80
- IP Reference Points 82
- Chapter 5 83
- Specifying MAC Address Ranges 84
- Table 5-3. SAP Codes 86
- (continued) 90
- Table 5-9. IP Protocol Codes 92
- Chapter 6 93
- <protocol> 94
- Click on Create 98
- Figure 6-8. Add Range Window 101
- 7. Click on OK 101
- Customizing Templates 104
- Editing a Template 105
- Creating an Inbound Filter 107
- Click on OK 108
- Editing an Inbound Filter 109
- Changing Filter Precedence 114
- Deleting an Inbound Filter 118
- Chapter 7 119
- Preparing Filter Templates 122
- Creating a New Template 123
- 2. Click on OK 129
- Creating an Outbound Filter 134
- Editing an Outbound Filter 136
- <protocol header> 138
- <filter criterion> 138
- Deleting an Outbound Filter 142
- Appendix A 143
- Configuration Examples and 143
- Implementation Notes 143
- Dial Backup Traffic 144
- Using Drop-All Filters 144
- • Length 148
- Length to 149
- (continued) 151
- Configuring DLSw 152
- Services 152
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