The Synchronous Data Link Control (SDLC) over the Logical Link Control, type 2 (LLC) protocol (SDLLC) function allows serial-attached devices using the SDLC protocol to communicate with LAN-attached devices using the LLC2 protocol. The basic purpose of the SDLLC function is to consolidate the traditionally disparate SNA/SDLC networks onto a LAN-based, multiprotocol, multimedia backbone network.
Routers use the SDLLC feature to terminate SDLC sessions, to translate SDLC to the LLC2 protocol, and to forward the LLC2 traffic through remote source-route bridging (RSRB) over a point-to-point or IP network. Because a router-based IP network can use any arbitrary media, such as FDDI, Frame Relay, X.25, or leased lines, routers support SDLLC over all such media through IP encapsulation.
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