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After the ATM signal is terminated, it is transmitted to the upper layer device through the fe uplink port of the LAN board, and enters the IP metropolitan area network. During the termination of atm signals,, Establish the corresponding relationship between the corresponding mac address and pvc. Instead, they implement the aal5 sar function and convert them into corresponding mac frames, that is, atm termination. But in ip-dslam, these atm signals do not perform multiplexing and service type processing as in atm dslam. The uplink signals are demodulated by dslam and converted into adsl signals.
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Implementation principle ip-dslam is the same as atm dslam in the processing of adsl signals. Therefore, with the decreasing availability of metro ATM resources, ATM-based dslam has become increasingly difficult to adapt to the needs of actual networking, and ip dslam will become the direction of dslam's future development. However, in many areas, operators have no longer expanded their existing metro ATM core networks and switched to building IP broadband metro core networks. The vast majority of dslams currently installed on the Internet are dslams in this way. It provides atm interface (such as 155mbit / s atm interface or n * 2mbit / s ima atm interface), Shanghai Metropolitan Area Core Network, with atm vp / vc cross-connection, provides atm traffic aggregation, and is implemented by atm's qos technology Service quality of service and flow control. The traditional dslam is a completely ATM-based device, which is often referred to as the dslam based on the ATM method. The ip dslam device extracts its own IP communication in the dslam device. Then extract the IP traffic of these devices and pass it to an IP network. The traditional 20th century dslam uses asynchronous transfer mode (atm) technology to connect to the ATM upstream router.
WHAT IS PASSTHROUGH MAC ADDRESS FULL
IP DSLAM Right! ip dslam (Internet Protocol, Digital Subscriber Line Access Multiplexer, full English name internet protocol digital subscriber line access multiplexer) ip dslam is used as an access device, and user traffic is mainly based on IP.
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Ip dslam (Internet Protocol, Digital Subscriber Line Access Multiplexer, full English name internet protocol digital subscriber line access multiplexer) ip dslam is used as an access device, and user traffic is mainly based on IP.