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Editing X.25 Parameters
117377-A Rev. A 4-13
Parameter: T1 Timer
Default: 60
Options: 1 to 999 seconds
Function: Specifies how long the router waits to receive an acknowledgment of a
transmitted command frame. Specifically, the T1 timer sets, in seconds,
the timeout values for Restart, Reset, and Clear commands. The router
uses this timer to set up data links.
Instructions: We recommend that you accept the default value, 60.
MIB Object ID: 1.3.6.1.4.1.18.3.5.9.4.5.1.32
Parameter: T2 Timer
Default: 180
Options: 1 to 999 seconds
Function: Specifies the call-confirmation timeout value in seconds. The value for
this timer is the amount of time the router has to respond to a
call-confirmation condition. This timer represents the ITU-T (formerly
CCITT) T11 timer for the DCE and the T21 timer for the DTE.
Instructions: We recommend that you accept the default value, 180.
MIB Object ID: 1.3.6.1.4.1.18.3.5.9.4.5.1.33
Parameter: T3 Timer
Default: 200
Options: 200 to 2000 milliseconds
Function: Specifies the congestion or busy condition watchdog timeout value in
milliseconds. The value for this timer is the length of time the router has
to respond to a congestion or busy condition.
Instructions: We recommend that you accept the default value, 200.
MIB Object ID: 1.3.6.1.4.1.18.3.5.9.4.5.1.34
Caution: We recommend that you accept the default T1 Timer, T2 Timer,
T3 Timer, and T4 Timer values. Reset these parameters with caution.
- Configuring X.25 1
- Services 1
- Contents 5
- 117377-A Rev. A 11
- About This Guide 15
- Before You Begin 16
- Conventions 16
- Acronyms 17
- Bay Networks Customer Service 19
- How to Get Help 20
- Chapter 1 21
- X.25 Overview 21
- X.25 and the OSI Model 22
- Physical Layer 23
- Data Link Layer 23
- Figure 1-3. LAPB Frame 24
- X.25 Service Types 25
- 1-6 117377-A Rev. A 26
- PVCs and SVCs 27
- How X.25 Services Work 27
- SVC Services 28
- 117377-A Rev. A 1-9 29
- How IPEX Works 33
- IPEX Network Interfaces 34
- X.25 PLP Interface 35
- TCP Interface 35
- IPEX Facility Support 36
- IPEX Connection Summary 38
- IPEX Mapping 38
- Q-bit Support 40
- How QLLC Works 41
- QLLC Mapping 42
- Adjacent and Partner Devices 42
- Chapter 2 45
- Implementation Notes 45
- Load Sharing 46
- Max Packet Length 47
- Flow-Control Negotiation 47
- Configuring Line Services 48
- DDN Default Service Record 49
- RFC 1356 Multiplexing 50
- 117377-A Rev. A 2-7 51
- PtoP Encapsulation 52
- X.25 over ISDN D Channel 52
- Further Information 53
- Chapter 3 55
- Enabling X.25 Service 55
- Selecting a Connector 56
- Config window (F 57
- Configuration window (F 58
- 60
- 3-8 117377-A Rev. A 62
- 3-10 117377-A Rev. A 64
- 3-12 117377-A Rev. A 66
- 67
- 3-14 117377-A Rev. A 68
- 3-16 117377-A Rev. A 70
- Chapter 4 73
- 4-2 117377-A Rev. A 74
- 80
- 4-10 117377-A Rev. A 82
- 4-12 117377-A Rev. A 84
- 4-14 117377-A Rev. A 86
- 88
- 4-18 117377-A Rev. A 90
- 92
- 93
- 4-22 117377-A Rev. A 94
- 95
- 96
- Click on Done 99
- 100
- 100
- Editing X.25 Parameters 101
- Configuring X.25 Services 102
- 4-30 117377-A Rev. A 102
- 4-32 117377-A Rev. A 104
- 106
- 108
- 110
- 110
- Deleting X.25 from the Router 111
- Chapter 5 113
- Editing LAPB Parameters 113
- 115
- 115
- 5-4 117377-A Rev. A 116
- 118
- Chapter 6 121
- Editing IPEX Parameters 121
- IPEX > Global 122
- 6-6 117377-A Rev. A 126
- 117377-A Rev. A 6-7 127
- 6-8 117377-A Rev. A 128
- 129
- 6-10 117377-A Rev. A 130
- Figure 6-8. Mapping Type Menu 130
- 131
- 6-12 117377-A Rev. A 132
- 6-14 117377-A Rev. A 134
- 6-16 117377-A Rev. A 136
- 6-18 117377-A Rev. A 138
- 6-20 117377-A Rev. A 140
- 117377-A Rev. A 6-21 141
- Deleting IPEX from the Router 142
- Chapter 7 143
- Editing QLLC Parameters 143
- 7-2 117377-A Rev. A 144
- 117377-A Rev. A 7-3 145
- Click on Add 146
- QLLC Mapping Parameters 148
- 7-10 117377-A Rev. A 152
- Appendix A 155
- Sample IPEX Configurations 155
- A-2 117377-A Rev. A 156
- Sample IPEX Configurations 157
- IPEX Single-Node Switching 158
- 117377-A Rev. A A-5 159
- Appendix B 163
- QLLC Configuration Examples 163
- Upstream QLLC Network 164
- QLLC Configuration Examples 165
- Downstream QLLC Network 166
- Endpoint QLLC Network 168
- Backbone QLLC Network 170
- Appendix C 171
- C-2 117377-A Rev. A 172
- (continued) 173
- C-4 117377-A Rev. A 174
- C-6 117377-A Rev. A 176
- Table C-6. IPEX Parameters 176
- Table C-7. QLLC Parameters 177
- Appendix D 179
- The Mapping Table follows: 180
- (continued) 181
- D-4 117377-A Rev. A 182
- D-6 117377-A Rev. A 184
- D-8 117377-A Rev. A 186
- D-10 117377-A Rev. A 188
- 117377-A Rev. A Index-1 191
- 117377-A Rev. A Index-3 193
- 117377-A Rev. A Index-5 195
- 117377-A Rev. A Index-7 197
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