
Configuring ATM DXI Services
2-2 117375-A Rev. A
Figure 2-1. How ATM DXI Works
ATM DXI Support
A router running ATM DXI provides the following support:
• Routing IP, IPX, XNS, DECnet Phase IV, AppleTalk, and VINES traffic over
the ATM network
• MAC-level transparent bridging over the ATM network
• Multiprotocol encapsulation functions defined in RFC 1294 and RFC 1483,
enabling concurrent bridging and multiprotocol routing support on the same
PVC
• A convergence sublayer (CS) function compatible with AAL 3/4 and AAL 5
as defined in Section 1 of the ITU-T (formerly CCITT) B-ISDN Protocol
Reference Model (PRM)
• Error checking
• ATM DXI Link Management Interface (LMI), including Simple Network
Management Protocol (SNMP) Proxy support -- a proprietary version of the
LMI -- available only when using Mode 2 Proprietary DXI encapsulation with
a Digital Link DSU/CSU.
• Broadcasting and multicasting support
DSU/CSU DSU/CSU
RouterRouter
T1 or T3 T1 or T3
HSSI or V.35/RS-449
ATM
Network
ATM0007A
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