Features - Cisco PA-A2 Installation And Configuration Manual

PA-A2 ATM CES Port Adapter Overview
In previous versions of PPP over ATM, you configure permanent virtual circuits (PVCs) for PPP over
ATM on point-to-point subinterfaces. In the current Cisco IOS releases (see the
Hardware Requirements" section on page
Internet Data Blocks (IDBs), one for virtual access interfaces, and one for ATM subinterfaces. Instead,
you can configure multiple PVCs for PPP over ATM on multipoint subinterfaces.
The new version of PPP over ATM also complies with the Internet Engineering Task Force (IETF) draft
on multiplexed encapsulation. The previous version of PPP over ATM supported Cisco's Frame
Forwarding data encapsulation (aal5ciscoppp). In the current Cisco IOS software releases (see the
"Minimum Software and Hardware Requirements" section on page
support virtual circuit (VC) multiplexed PPP payloads as specified by the PPP over AAL5 Internet Draft
(12/23/97). Therefore, the name for this new PPP over ATM feature is more accurately IETF PPP over
ATM.
Note The IETF PPP over ATM feature does not currently support LLC encapsulated PPP over ATM Adaption
Layer 5 (AAL5).

Features

The PA-A2 ATM CES port adapter has the following features:
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In addition, the ATM CES port adapters now support the following additional features:
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PA-A2 ATM CES Port Adapter Installation and Configuration
1-16
Cross-connect Circuit Emulation Services (CES)—Structured and unstructured
Four-port T1 or E1 (120-ohm) constant bit rate (CBR) for CES
Network timing distribution
On/off hook Channel Associated Signaling (CAS)
Segmentation and reassembly (SAR) of up to 512 buffers simultaneously, where each buffer
represents a transmit channel
Up to 2046 virtual circuits (VCs) and 124 CBR VCs
ATM adaptation layer (AAL) 5
Single-port SONET/SDH OC-3 single-mode intermediate reach ATM uplink
Single-port DS3 ATM WAN uplink over T3/E3
Traffic shaping (per VP and VC)
ABR, CBR, VBR, and UBR Quality of Service (QoS)
Operation, Administration, and Maintenance (OAM) cells
Online insertion and removal (OIR)
New VC configuration
VC integrity management
PVC discovery
Multiprotocol inverse ARP
PPP over ATM
Chapter 1
2-1), each PPP over ATM connection no longer requires two
2-1), PPP over ATM is enhanced to
Overview: PA-A2 ATM CES Port Adapter
"Minimum Software and
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