Welcome to the IP2000
Network architecture overview
Stinger®
IP2000 Configuration Guide
1-5
Figure 1-2. Sample setup showing Internet access and voice over ATM
Multiplexing multiple IP flows on a single ATM VCC
A Stinger IP2000 supports an implementation of Class of Service (CoS) that co-exists
with the Stinger ATM QoS implementation. This feature allows transferring multiple
IP video streams (multicast and unicast) over single user-side ATM virtual circuit.
Figure 1-3. Sample setup showing multiple IP flows to a CPE router
The proprietary CoS implementation enables the delivery of differentiated services
over an IP infrastructure. All traffic handled by the IP2000, whether encapsulated IP
or native ATM, passes through the network processor function.
Non-IP terminated ATM traffic, including operations, administration, and
maintenance (OAM) F5 traffic, is treated as highest priority and handled in an ATM
pass-through mode. This traffic passes through the network processor with no further
processing.
RFC 1483 IP traffic that terminates on the IP2000 is reassembled from ATM cells into
IP packets. It is then classified and assigned to priority output queues. Per-VC strict-
priority queuing is supported with three priority levels as described in Table 1-2.
CPE
router
IP/ATM
CellPipe
IAD
ATM
Network side
User side
Internet
ATM
Voice
IP/ATM
Services:
Internet access
Services:
Voice, Internet
access
ISP
Voice
gateway
NET-1
IP multicast
IP/ATM
Multicast
router
Set-top box (STB)
PC
Network side
User side
Internet
Voice
IAD
Services:
Multicast
video, VoATM,
Internet access
ATM
ISP
Per-VC
priority
queueing
Voice
gateway
IP/ATM