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Data Sheet
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Supports AAL2 for voice services (Cisco 7200 with OC-3/STM-1, DS3, and E3 interfaces
only)
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Layer 2 per-virtual circuit and per-virtual path queuing and traffic shaping
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ATM permanent virtual connections (PVCs) and switched virtual connections (SVCs)
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LANE 2.0 client and server
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F4 and F5 operations and maintenance (OAM) cell support
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Multiprotocol over ATM (MPoA) client and server
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Multiprotocol Label Switching (MPLS), MPLS traffic engineering, MPLS virtual private
network (VPN), MPLS CoS
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Integrated Local Management Interface (ILMI)
Extended Virtual-Connection Capabilities
The Cisco ATM Port Adapter supports up to 8192 virtual connections. Any combinations of virtual
circuit and virtual path can be supported up to a maximum number of 8191 virtual circuit/virtual
path combinations. These virtual circuits can be either PVCs that are created manually or SVCs
created through point-to-point and point-to-multipoint UNI signaling.
These capabilities contribute to the high-performance throughput, and specifically benefit
applications that require many virtual circuits, such as in DSL applications and in a campus LAN.
Advanced Traffic Management
Advanced traffic management mechanisms in the Cisco ATM Port Adapter architecture allow for
the support of bursty client/server traffic, while supporting applications that require guaranteed or
best-effort service.
The Cisco ATM Port Adapter supports multiple ATM service classes, including ABR, VBR-nrt,
UBR, VBR-rt, and CBR.
Supported Service Categories
Table 4 gives typical uses for the Cisco ATM Port Adapter service classes.
Table 4.
Typical Uses for Cisco ATM Port Adapter Service Classes
Cisco ATM Port Adapter
Service Classes
Service Classes
Typical Uses
VBR-nrt
Used for all applications that require a level-of-service guarantee through the ATM network
UBR
Used mostly for data applications that require only best-effort service and little configuration
ABR
Used to maximize bandwidth utilization of the ATM link through the use of congestion
feedback notification (with ability to define minimum bandwidth)
feedback notification (with ability to define minimum bandwidth)
VBR-rt
Intended for real-time applications, such as compressed voice over IP (VoIP) and
videoconferencing, that require tightly constrained delays (cell transfer delay [CTD]) and
delay variation (cell delay variation [CDV])
videoconferencing, that require tightly constrained delays (cell transfer delay [CTD]) and
delay variation (cell delay variation [CDV])
CBR
Designed for ATM virtual circuits that need a static amount of bandwidth that is
continuously available for the duration of the active connection
continuously available for the duration of the active connection