Cisco Systems OL-4344-01 manual Control tier

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Chapter 1 About Cisco IP Solution Center

The Four-Tier System Architecture

•Control tier

The Control Tier consists of the ISC Repository (a relational database) and the task scheduling and distribution system. In ISC, there is only one Control tier machine, and it is called the master machine. The master machine is the nerve center of the whole infrastructure; you can consider it to be identical to the ISC workstation itself. All vital information is stored in the Repository of the master machine. The master controls how tasks are distributed to the back-end system. If very high Repository throughput is required, a high-end database, such as the parallel Oracle, can be used to gain the high performance and high throughput.

•Distribution tier

The Distribution tier consists of the Processing servers and Collection servers. Each Processing server or Collection server runs on its own physical machine. Processing servers are responsible for executing tasks such as provisioning, auditing, SLA data collection, and so on. There can be one or more Processing server machines.

A Collection server is responsible for interacting with the network devices. For example, configuration upload and download to a Cisco router is through its Collection server. In other words, each Collection server owns a set of network devices. Collection servers and their geographically related network devices are organized into collection zones. There can be one or more Collection servers per installation. A Collection server is called into service when data is needed from one of the devices that it owns.

Although the Web server, the Master server, the Processing server, and the Collection server are normally installed on different physical machines for large installations, they can be collapsed into a single machine for a small installation. In this case then, there is only one instance of the Web server, Processing server, and Collection server.

Cisco IP Solution Center, 3.0: MPLS VPN Management User Guide, 3.0

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OL-4344-01

 

 

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Contents About Cisco IP Solution Center Overview of ISC ISC Network Management SubnetISC Features Service Provider Network for Vlan ID Management Access Domain Assigned Resource PoolsFeatures and Functions Provided in Provisioning with ISC VPN Service Profile-Based ProvisioningRole-Based Access Control Rbac CPE Customer’s and Provider’s View of the Network Customer’s View of the NetworkAbout Provider Edge Routers PEs About Multi-VRF CEsA Multi-VRF CE Providing Layer 3 Aggregation Using Templates to Customize Configuration Files Mapping IPsec Tunnels to Mpls VPNsAuditing Service Requests Uses for the Template FunctionAbout Mpls VPNs VPNs Sharing SitesCharacteristics of Mpls VPNs Intranets and ExtranetsVPN Routing and Forwarding Tables VRFs VRF Implementation Considerations Ip vrf site2 rdCreating a VRF Instance Route Distinguishers and Route TargetsRoute Target Communities CE Routing CommunitiesHub and Spoke Considerations Security Requirements for Mpls VPNs Address Space and Routing SeparationAddress Space Separation Routing SeparationHiding the Mpls Core Structure Resistance to Attacks Securing the Routing ProtocolLabel Spoofing Routing Authentication Securing the Mpls CoreTrusted Devices PE-CE InterfaceConnectivity Between VPNs LDP AuthenticationSeparation of CE-PE Links MP-BGP Security Features Security Through IP Address ResolutionAPI Functionality Supported North Bound Interface NBIEnsuring VPN Isolation API Approach Distributed Load BalancingNBI Benefits 11 Simple Flat-Based Server Load Balancing Configuration Four-Tier System Architecture Client tierControl tier
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