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General Description 2-13
Functional Description
Figure 2-12). To allow the IPX switch or IGX switch to be used in mixed networks with other ATM
switches, there are two other addressing modes available, Cloud Addressing Mode (CAM) and
Simple Addressing Mode (SAM).
BAM
In the BPX switch Addressing Mode (BAM), used for all Cisco WAN switching networks, the
system software determines VPI and VCI values for each connection that is added to the network.
The user enters the beginning and end points of the connection and the software automatically
programs routing tables in each node that will carry the connection to translate the VPI/VCI address.
The user does not need to enter anything more. This mode uses the STI header format and can
support all of the optional Cisco WAN switching features.
SAM
In the Simple Addressing Mode (SAM), the user must manually program the path whole address,
both VPI and VCI values.
CAM
The Cloud Addressing Mode (CAM) is used in mixed networks where the virtual path addresses are
programmed by the user and the switch decodes the VCI address. Both CAM and SAM utilize the
UNI header type.