Avaya Configuring Frame Relay Services Manuel d'utilisateur Page 31
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Frame Relay Overview
117376-B Rev. 00 2-5
• Command/response bit (C/R)
ITU-T (formerly CCITT) standards do not use this bit.
• Forward explicit congestion notification (FECN) and backward explicit
congestion notification (BECN)
The FECN and BECN indicate congestion on the network. See “Congestion
Control,” on page 2-
16 for information about how the frame relay software
uses these bits.
• Discard eligibility (DE)
The DE bit allows the router to mark specific frames as low priority (discard
eligible) before transmitting them to the frame relay network.
• Extended address bit (EA)
The EA bit signals whether the next byte is part of the address. This bit
indicates the last byte of the DLCI.
Figure 2-2. Frame Relay Header: 2-Byte Format
Figure 2-2 shows the frame relay header as a 2-byte structure. Frame relay can
also format the header using 3 or 4 bytes, as shown in F
igure 2-3. Note, however,
that you must configure the frame relay interface on the router to use the same
header length as the switched network to which it is connected.
DLCI (high order) C/R
DE
EA
F
E
C
N
DLCI (low order)
8 7 6 5 4321
B
E
C
N
Flag
Frame
relay
header
Information
(data)
CRC
Flag
EA
FR0002A
- Configuring 1
- Frame Relay Services 1
- Contents 5
- Incoming 6
- 117376-B Rev. 00 11
- About This Guide 15
- Conventions 16
- Acronyms 17
- Bay Networks Customer Service 18
- How to Get Help 19
- Chapter 1 21
- Starting Frame Relay 21
- Configuring PVCs and SVCs 22
- Configuring an SVC 23
- Configuring IP Adjacent Hosts 24
- Configuring IPX Adjacent Hosts 25
- 1-6 117376-B Rev. 00 26
- Chapter 2 27
- Frame Relay Overview 27
- Introduction 28
- Permanent Virtual Circuits 29
- Switched Virtual Circuits 29
- PVC and SVC Comparison 30
- Frame Relay Packets 30
- 117376-B Rev. 00 2-5 31
- Management Protocols 32
- Frame Processing 34
- Frame Relay Service Records 34
- Frame Relay Access Modes 35
- Direct Access Mode 36
- Hybrid Access Mode 36
- 2-12 117376-B Rev. 00 38
- Source Routing 39
- RFC 1490 39
- Address Resolution for PVCs 39
- Address Resolution for SVCs 40
- Traffic Control 40
- Data Compression 41
- Data Encryption 42
- Protocol Prioritization 42
- Congestion Control 42
- Traffic Shaping 44
- Quality of Service 45
- 2-20 117376-B Rev. 00 46
- Traffic Shaping for SVCs 47
- 2-22 117376-B Rev. 00 48
- Traffic Shaping Considerations 49
- WCP and CIR Enforcement 50
- Oversubscribing the Interface 51
- 2-26 117376-B Rev. 00 52
- X.213 Priority for SVCs 53
- Inactivity Timing for SVCs 53
- 2-28 117376-B Rev. 00 54
- Multiline for PVCs 55
- 2-30 117376-B Rev. 00 56
- PVC Pass Through 57
- Frame Relay Dial Services 58
- 2-34 117376-B Rev. 00 60
- Chapter 3 61
- Customizing Frame Relay 61
- Selecting a Management Type 62
- Selecting a DLCI Address Type 63
- Selecting Address Length 64
- Monitoring the Connection 65
- 3-6 117376-B Rev. 00 66
- Customizing PVCs 67
- To delete service records: 68
- Enabling Multicast 70
- Configuring PVC Pass Through 72
- 3-14 117376-B Rev. 00 74
- To enable congestion control: 75
- 3-16 117376-B Rev. 00 76
- Enabling Compression for PVCs 77
- 3-18 117376-B Rev. 00 78
- Removing Multiline Services 79
- Customizing SVCs 80
- Adding SVCs 81
- 3-22 117376-B Rev. 00 82
- Disabling SVCs 83
- Disconnecting SVCs 84
- To edit LAPF parameters: 85
- To edit Signaling parameters: 86
- To set X.213 priority values: 88
- 3-30 117376-B Rev. 00 90
- To enable traffic shaping 91
- Enabling Compression for SVCs 92
- To disable compression: 93
- Deleting Frame Relay 95
- Appendix A 97
- A-2 117376-B Rev. 00 98
- 100
- Site Manager Parameters 101
- 102
- 102
- A-8 117376-B Rev. 00 104
- A-10 117376-B Rev. 00 106
- SVC LAPF Parameters 107
- A-12 117376-B Rev. 00 108
- 109
- 110
- A-16 117376-B Rev. 00 112
- SVC Signaling Parameters 113
- A-18 117376-B Rev. 00 114
- A-20 117376-B Rev. 00 116
- Parameters for PVCs 118
- A-24 117376-B Rev. 00 120
- PVC Service Record Parameters 122
- 123
- 123
- A-28 117376-B Rev. 00 124
- 125
- A-30 117376-B Rev. 00 126
- A-32 117376-B Rev. 00 128
- SVC Service Record Parameters 130
- 133
- 134
- SVC Options Parameters 136
- A-46 117376-B Rev. 00 142
- A-48 117376-B Rev. 00 144
- A-50 117376-B Rev. 00 146
- A-52 117376-B Rev. 00 148
- Appendix B 151
- B-2 117376-B Rev. 00 152
- Table B-1. RIP Parameters 152
- B-4 117376-B Rev. 00 154
- B-6 117376-B Rev. 00 156
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