Avaya Configuring Frame Relay Services Uživatelský manuál Strana 33
- Strana / 94
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
Frame Relay Overview
117376-A Rev. A 2-13
Figure 2-7. Big Pipe/Little Pipe Topology
The central site router sends traffic at its available bandwidth, in this example at
T1 rates (1.536 Mb/s). Some switches recognize that the remote site is configured
at a lower speed, and begin to drop frames above the capacity of the remote site
router. At the remote site, the frame relay interface discards frames beyond its
available buffer. The assumption is that the user application detects the lost frames
and either retransmits them or uses a flow control mechanism in the protocol, such
as windowing, to throttle (queue) the traffic. But not all applications have a robust
mechanism to deal with lost or out-of-sequence frames.
You can use Bay Networks WAN Compression Protocol (WCP), protocol
prioritization, congestion control, and traffic shaping either singly or in
combination to help control the flow of traffic and avoid loss of data.
Data Compression
You can configure both hardware- and software-based data compression over
WANs running frame relay.
Enabling compression improves bandwidth efficiency by eliminating redundant
strings in data streams. This, in turn, improves network response times and
reduces line costs. Enabling compression on a frame relay link also provides
reliability. Both sides of a link using compression maintain a history of data that
has already traveled across the network, and WCP (WAN Compression Protocol)
detects and retransmits dropped packets.
FR0013A
64 Kb/s
B
64 Kb/s
D
64 Kb/s
C
1.536/2.048 b/s
A
- Configuring Frame Relay 1
- Services 1
- Contents 5
- 117376-A Rev. A 11
- About This Guide 13
- Conventions 14
- Acronyms 15
- Bay Networks Customer Service 16
- How to Get Help 17
- Starting Frame Relay 19
- Chapter 1 19
- Chapter 2 21
- Frame Relay Overview 21
- Introduction 22
- Frame Relay Packets 23
- Management Protocols 24
- 117376-A Rev. A 2-5 25
- DLCMI DLCMI 25
- Frame Processing 26
- Frame Relay Service Records 26
- Frame Relay Access Modes 27
- Direct Access Mode 28
- Hybrid Access Mode 28
- 2-10 117376-A Rev. A 30
- Source Routing 31
- RFC 1490 31
- Address Resolution 31
- Traffic Control 32
- Data Compression 33
- Protocol Prioritization 34
- Congestion Control 34
- Traffic Shaping 36
- Quality of Service 37
- 2-18 117376-A Rev. A 38
- Traffic Shaping Considerations 39
- WCP and CIR Enforcement 40
- Oversubscribing the Interface 41
- 2-22 117376-A Rev. A 42
- Multiline 43
- 2-24 117376-A Rev. A 44
- 2-26 117376-A Rev. A 46
- Chapter 3 47
- Customizing Frame Relay 47
- Using the MIB Object ID 48
- Adding Service Records 48
- Deleting Service Records 49
- Adding PVCs 50
- Deleting PVCs 51
- Selecting a Management Type 52
- Selecting a DLCI Address Type 54
- Selecting Address Length 54
- Monitoring the Connection 55
- Polling Interval 56
- Full Enquiry Interval 56
- Enabling Multicast 57
- 3-12 117376-A Rev. A 58
- Configuring Hybrid Mode 59
- Controlling Congestion 59
- 3-14 117376-A Rev. A 60
- Using Traffic Shaping 61
- Enabling Compression 62
- Removing Multiline Services 64
- Deleting Frame Relay 65
- Appendix A 67
- Site Manager Parameters 67
- 68
- 70
- 70
- A-6 117376-A Rev. A 72
- A-8 117376-A Rev. A 74
- A-10 117376-A Rev. A 76
- A-12 117376-A Rev. A 78
- A-14 117376-A Rev. A 80
- 81
- 81
- A-16 117376-A Rev. A 82
- 84
- A-20 117376-A Rev. A 86
- 88
- Appendix B 89
- Frame Relay Default Settings 89
- B-2 117376-A Rev. A 90
- 117376-A Rev. A Index-1 91
- 117376-A Rev. A Index-3 93
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