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The Enhanced ATM VC Configuration and Management feature set includes new and enhanced capabilities that allow you to create and manage ATM PVCs and SVCs with more ease and improved integrity. This feature set includes the following five subfeatures:
Use the Enhanced ATM VC Configuration and Management feature set to simplify and expedite PVC and SVC configurations and improve the management of PVC and SVC integrity. The benefits of this feature set include:
Interim Local Management Interface (ILMI)--Specification developed by the ATM Forum for incorporating network-management capabilities into the ATM UNI.
Inverse Address Resolution Protocol (Inverse ARP)--Method of building dynamic routes in a network. Allows an access server to discover the network address of a device associated with a virtual circuit.
Operations, Administration, and Management (OAM)--ATM Forum specification for cells used to monitor virtual circuits. OAM cells provide a virtual circuit-level loopback in which a router responds to the cells, demonstrating that the circuit is up, and the router is operational.
Quality of Service (QOS)--Measure of performance for a transmission system that reflects its transmission quality and service availability.
rate queue--In ATM, a value associated with one or more virtual circuits that defines the speed at which an individual virtual circuit transmits data to the remote end. Each rate queue represents a portion of the overall bandwidth available on an ATM link. The combined bandwidth of all configured rate queues should not exceed the total available bandwidth.
Simple Network Management Protocol (SNMP)--Network management protocol used almost exclusively in TCP/IP networks. SNMP provides a means to monitor and control network devices, and to manage configurations, statistics collection, performance, and security.
Unspecified Bit Rate (UBR)--QOS class defined by the ATM Forum for ATM networks. UBR allows any amount of data up to a specified maximum to be sent across the network, but there are no guarantees in terms of cell loss rate and delay.
Variable Bit Rate-Non Real Time (VBR-NRT)--VBR-NRT is used for connections in which there is no fixed timing relationship between samples, but that still need a guaranteed QOS.
virtual circuit (VC)--Logical circuit created to ensure reliable communication between two network devices. A virtual circuit is defined by a VPI/VCI pair, and can be either permanent (a PVC) or switched (an SVC). In ATM, a virtual circuit is also called a virtual channel.
Virtual Circuit-Alarm Indication Signals (VC-AIS)--Generated by a VCC node at a connecting point to alert the downstream VCC nodes that a failure has been detected upstream. The VC-AIS can be caused by the detection of a VCC failure or by the notification of a physical layer failure.
Virtual Circuit-Remote Detect Indicator (VC-RDI)--Upon receiving a VC-AIS, the VCC end-point at the public UNI will return a VC-RDI to alert the upstream nodes that a failure has been detected downstream.
For configuring ATM PVCs and SVCs, do not use the commands prior to this release (for example, the atm pvc command) in combination with the commands presented in this document. To configure any of the new subfeatures introduced in this release, you must use the new command syntax.
The following restrictions apply to the Multiprotocol Inverse ARP subfeature:
The Enhanced ATM VC Configuration and Management feature set is supported on these platforms:
Before you configure ATM PVCs and SVCs, you must enable your Cisco router platform. Refer to one of the following chapters in the Cisco IOS Release 11.3 Wide-Area Networking Configuration Guide for enabling your platform:
For PVC Discovery, the attached adjacent switch must support UNI version 3.1 or higher.
Multiprotocol Inverse ARP supports the following RFCs:
Enhanced ATM VC Configuration and Management does not support any MIBs.
To configure the subfeatures of the Enhanced ATM VC Configuration and Management feature set, refer to the following chapters:
Refer to the "Enhanced ATM VC Configuration and Management Commands" chapter for command reference and debug command documentation.
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