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Download the BA25 Linux Manual in PDF format.
The BA25 system is an Ethernet to HDLC bridge. It consists of a PMC-MC-X2-RIO chassis populated with a P2020 based PrPMC in position 0 and and an HDLC I/O card in position 1. The P2020 controller is running Linux 2.6.35 SMP. The HDLC driver and bridge client reside on this controller. A packet server/bridge controller interfaces with the bridge client via UDP or TCP sockets. This server may reside on the PrPMC or an external Linux server. The choice of socket protocol is driven by customer network. If the X2 chassis resides on the same LAN as the bridge controller TCP sockets are preferred. If the X2 is accessed over a WAN, TCP sockets can be used if the network supports WAN acceleration/optimization, otherwise UDP sockets should be utilized.
Multiple X2 chassis(s) can be supported by the Bridge Controller, thus one or more chassis(s) could reside on the local LAN, others could be accessed remotely over a WAN. Thus the Bridge Controller may also serve as an HDLC router, for example, consider a 2 chassis setup. Packets received on port 1 box 1 could be routed to box 2 port 3 for transmission. Source or destination can be a port or possibly a file. Routes may be configured via a routing table file, or via a Bridge Controller API. The current implementation supports 4 HDLC ports per X2 chassis.
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