Cisco Systems 8600 Series manual FastPacket Adaptation to ATM, Sti, Cam Uni, Sam Uni

Functional Description

	Table 2-2	ATM Cell Addressing Modes
Addressing Mode	Hdr. Type	Derivation of VPI/VCI	Where Used
BAM-BPX switch	STI	VPI/VCI = Node Derived	Between IPX switch (or IGX switch) and BPX
Addressing Mode		Address	switches, or between IPX switch (or IGX switch)
			nodes.
CAM—	UNI	VPI = User Programmed	IPX switch to IPX switch (or IGX switch)
Cloud Addressing Mode		VCI = Node Derived Address	connections over networks using ATM switches that
			switch on VPI only. VPI is manually programmed by
			user. Terminating IPX switch converts VCI address
			to FastPacket address.
SAM—	UNI	VPI/VCI = User Programmed	IPX switch to IPX switch (or IGX switch)
Simple Addressing Mode			connections over networks using ATM switches that
			switch where all routing is manually programmed by
			user, both VPI and VCI.

Figure 2-12 BAM, CAM, and SAM Configurations

BAM IGX BTM

AIT IPX

BAM

CAM

SAM

IPX AIT

IPX AIT

IPX AIT

ATM cloud

VP switch

ATM cloud

VP/VC switch

BNI BPX

AIT IPX

BTM IGX H8150

Note: IPX with AIT card are interchangeable with IGX with BTM card in this diagram.

FastPacket Adaptation to ATM

A specialized adaptation that is of particular interest to users of Cisco equipment is the adaptation of IPX switch FastPackets to ATM cells. There are a large number of narrowband IPX switch networks currently in existence that are efficiently carrying voice, video, data, and frame relay. A means must be provided to allow these networks to grow by providing a migration path to broadband.

Since FastPackets are already a form of cell relay, the adaptation of FastPackets to ATM cells is relatively simple.

2-14Cisco BPX 8600 Series Reference