Specifications

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2.10.10 ATM Interfaces Specifications
The ATM OC-3/STM-1 and ATM OC-12/STM-4 Physical Interface Cards (PICs)
for M-series Internet backbone routers provide both the performance and the
density to scale ATM-based backbones. They are useful for terminating ATM
access circuits and for terminating ATM virtual circuits extending across a
network backbone.
ATM PICs are useful for terminating ATM access circuits and for terminating ATM
virtual circuits extending across a network backbone. When used with Juniper
Networks, Inc. Circuit Cross-connect, they are useful for tunneling virtual circuits
across an Multiprotocol Label Switching (MPLS) backbone.
Features
§ Wire-rate parsing of SONET/ SDH frames
§ Multiprotocol Label Switching (MPLS) Circuit Cross-connect for
leveraging ATM access networks
§ OAM Fault Management processes Alarm Indication Signal (AIS) and
Remote Detect Indicator (RDI) cells; indicates a failure in the ATM
network and turns off applicable ATM interfaces, thereby providing end-
to-end virtual circuit failure notification
§ Inverse ATM ARP enables routers to automatically learn the IP address
of the router on the far end of an ATM permanent virtual circuit (PVC)
§ UBR traffic shaping
§ Fine-grained VBR traffic shaping; up to 128 increments between existing
rates
§ ASIC-based Packet Segmentation and Re-assembly (SAR)
management and output port queuing
§ 16-MB SDRAM memory for ATM SAR
§ AAL5 Subnetwork Attachment POINT (SNAP)
§ ATM switch ID displays the switch IP address and local interface name
of the adjacent FORE ATM switches
§ Operation, Administration, and Maintenance (OAM) Fault Management
processes Alarm Indication Signal (AIS) and Remote Direct Indicator
(RDI) cells
§ ATM and SONET/SDH standards compliant
§ Alarm and event counting and detection
§ Per-port status LED
MPLS Circuit Cross-connect for Multiple Service Offerings
MPLS Circuit Cross-connect offers the flexibility to leverage an IP backbone
for multiservice applications by combining Layer 2 switching capabilities with
IP traffic engineering and tunneling capabilities. On any given port, you can
terminate, switch, or tunnel a virtual circuit through an MPLS label switched
path (LSP). Circuit Cross-connect maps between Frame Relay or ATM AAL5
virtual circuits, as well as between PPP or Cisco HDLC circuits into MPLS
LSPs.
Switched connections are user configurable, and any protocol can be carried
in the payload, although virtual circuits must be of the same type on both
ends of the MPLS tunnel.
Circuit Cross-connect also enables you to stitch traffic engineering domains
together. You can interconnect LSPs across different domains without IP
routing, thereby enabling them to remain private.