Avaya Configuring DLSw Services User Manual Page 39

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Data Link Switching Overview
303523-A Rev. 00
1-15
Figure 1-6 illustrates a network using adjacent routers, each performing single-
switch conversion. Between single switch routers, the LLC2 protocol is used.
Figure 1-6. Bay Networks Adjacent Single-Switch Routers
QLLC-to-LLC2 Conversion
Using single-switch conversion enables the router to convert incoming QLLC
traffic (received over an X.25 network) into the appropriate format for forwarding
to an attached LAN or Frame Relay network. The conversion does not require an
intervening WAN.
Dual-Switch Services
DLSw dual-switch services allow SNA and NetBIOS traffic to share a
multiprotocol backbone. The DLSw standard specifies TCP/IP as the standard
transport mechanism for SNA and NetBIOS across an internetwork.
Bay Networks router
Token Ring
Bay Networks router
SDLC
Cluster controller
LLC2
LLC2 LLC2
Token Ring
Ethernet
Frame Relay
backbone
NetBIOS
server
Logical connection
SNA
processor
Frame Relay
(only)
DLS0003A
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