User manual

Nortel Secure Router 8000 Series
Configuration -WAN Access
Issue 5.3 (
30 March 2009) Nortel Networks Inc. iii
Figures
Figure 7-1 X.25 network model .........................................................................................................................7-3
Figure 7-2 X.25 protocol Layer..........................................................................................................................7-4
Figure 7-3 X.25 packet and LAPB frame...........................................................................................................7-5
Figure 7-4 Interrelationship between LAPB, X.25 and X.25 switching.............................................................7-6
Figure 7-5 Diagram of X.25 network load balancing.........................................................................................7-7
Figure 7-6 XOT typical application diagram......................................................................................................7-8
Figure 7-7 X.25 channel division.....................................................................................................................7-16
Figure 7-8 LAN interconnection through X.25................................................................................................7-24
Figure 7-9 X.25 switching networking diagram...............................................................................................7-30
Figure 7-10 Direct connection between two routers through serial interfaces (LAPB) ...................................7-39
Figure 7-11 Direct connection of two routers through serial interface (X.25) .................................................7-41
Figure 7-12 Connecting routers to an X.25 public packet network..................................................................7-45
Figure 7-13 Networking diagram for configuring VC......................................................................................7-48
Figure 7-14 X.25 PVC bearing IP datagram.....................................................................................................7-50
Figure 7-15 One VC consisting of several LCs................................................................................................7-51
Figure 7-16 Diagram of X.25 sub-interface configuration...............................................................................7-53
Figure 7-17 SVC application networking diagram of XOT .............................................................................7-57 T
Figure 7-18 Networking diagram of typical configuration of X.25 hunt group ...............................................7-65
Figure 7-19 X.25 hunt group carrying IP data transmission.............................................................................7-69
Figure 7-20 Direct connection of two routers through serial interfaces (X.25)................................................7-73