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Figure 1: ATM OC-3 Network Modules
New Features
RFC 1577 support for routing over ATM
RFC 1483 support for multiple encapsulations over ATM
ATM Forum UNI 3.0, 3.1, and 4.0
ATM PVCs and SVCs
LANE 2.0
Layer 2 per-VC queuing
Up to 1024 simultaneous Virtual Circuits (VCs)
AAL5 ATM adaptation layer
ATM Service classes: UBR, UBR+, VBR-rt, VBR-nrt, ABR, and CBR (data only)
Permanent virtual paths (PVPs)
ATM bandwidth (resource) manager
MPOA client and server
Tag Switching (MPLS when approved)
IETF Point-to-Point Protocol (PPP) over ATM
NHRP (Next Hop Resolution Protocol)
F4 and F5 operations and management (OAM) cell support
Interim Local Management Interface (ILMI)
System Requirements
Supported on 2691, 3600 Series and 3725; EP version supported on 3745
Requires “Plus” Feature sets of IOS Release 12.0(3)T or above
Maximum of one ATM OC-3 network module supported on 2691, 3600 and 3725. Maximum of two ATM
OC-3 network module supported on 3745
No additional Flash or DRAM memory requirements other then the Cisco IOS release 12.0(3)T Plus feature set
specified minimum memory requirements
Operates in conjunction with all currently available Cisco 2600, 3600 and 3700 network modules and WAN
interface cards (WICs)
No slot placement restrictions on all platforms
Recommended maximum of two high-speed network modules in a Cisco 3640 (includes Fast Ethernet, ATM,
HSSI)