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DLCI window
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Model 3120 RAS Administrators’ Reference Guide
14 • Frame Relay
LMI Interface (frDlcmiInterface)
LMI is used in the generic sense as an in-band signaling system. The signaling is slightly different depending
on which end of the Frame Relay Interface it is, or in other words its orientation. The User end issues periodic
STATUS ENQUIRY messages and waits for a STATUS reply from the Network. The USER setting is correct
if the access server is a DCE connecting to a Frame Relay network. It is possible to configure an access server to
“look” like a Frame Relay Network. By setting the LMI Interface to NETWORK, you can connect another
Frame Device directly to the access server. This is also the setting if you were to connect two access servers
back-to-back without the benefit of an established Frame Relay network.
Bidirectional Polling(frDlc rDlcmiPollingBiDir)
Bidirectional Polling pertains only to the Network LMI side. If enabled, the Network LMI issues STATUS
ENQUIRY messages and waits for a STATUS reply from the User.
Polling Verification (T392)( frDlcmiPollingVerification)
Polling Verification pertains only to the Network LMI side. It is the amount of time permitted without receiv-
ing a STATUS ENQUIRY message from the User before Counting an Error.
DLCI window
The Data Link Connection Identifier (DLCI) provides each PVC with a unique identifier at both the access
server and the Frame Relay switch. Within each link (DLMI) there can be multiple Permanent Virtual Circuits
(PVC). Each of these PVCs are point-to-point links to remote locations, and define the data path between the
access server and the Frame Relay network.
Within each DLMI are one or more Data Link Channel Identifier (DLCIs). This is the identification of a PVC
within the Frame Relay link.
There will be at least one PVC automatically installed. This is the management DLCI or LMI. This DLCI,
often DLCI 0, is the communication channel between the access server and the Frame Relay network switch.
This management channel communicates configuration and health information of the Frame Relay link. See
Figure 74.
Figure 74. DLMI—Configuration View window
Содержание 3120
Страница 8: ...Contents Model 3120 RAS Administrators Reference Guide 8...
Страница 12: ...About this guide Model 3120 RAS Administrators Reference Guide 12...
Страница 16: ...1 Introduction Model 3120 RAS Administrators Reference Guide 16 Saving HTTP HTML Object Changes...
Страница 21: ...21 Chapter 3 Import Export Chapter contents Introduction 22 Export Configuration 22 Import Configuration 24...
Страница 32: ...4 Alarms Model 3120 RAS Administrators Reference Guide 32 Modify Alarms Configuring alarm severity levels...
Страница 134: ...8 Dial Out Model 3120 RAS Administrators Reference Guide 134 An example section of dialout...
Страница 140: ...9 Callback Access Server Administrators Reference Guide 140 Dialout...
Страница 176: ...13 Filter IP Model 3120 RAS Administrators Reference Guide 176 An example of using a filter...
Страница 178: ...14 Frame Relay Model 3120 RAS Administrators Reference Guide 178 Congestion frameEnableCongestion 184...
Страница 226: ...17 MFR Version 2 Model 3120 RAS Administrators Reference Guide 226 MFR Version 2 Modify...
Страница 238: ...19 SNMP Model 3120 RAS Administrators Reference Guide 238 Out...
Страница 250: ...20 System Model 3120 RAS Administrators Reference Guide 250 System Packet Holding Message Blocks...
Страница 299: ...299 Chapter 24 About Chapter contents Introduction 300 Patton Electronics Company contact information 300...
Страница 304: ...25 License Model 3120 RAS Administrators Reference Guide 304 End User License Agreement...
Страница 309: ...309 Appendix B MIB trees Chapter contents Model 2960 MIB Tree Structure 310...