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Feature Description - VPN 01

NE05E and NE08E V300R003C10SPC500

This is NE05E and NE08E V300R003C10SPC500 Feature Description - VPN
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Overview of Tunnel Management

Overview of Tunnel Management

Definition

Tunnel management is a mechanism used to select a certain tunnel for an application according to specific configurations and notifies the application of the tunnel's status.

VPN tunnel management overview covers the introduction to common VPN tunnels, including label switched paths (LSPs) and Multiprotocol Label Switching (MPLS) traffic engineering (TE) tunnels, and tunnel configuration management.

Common VPN Tunnels

Common VPN tunnels include:

  • LSPs

    LSPs are used as tunnels for VPN data forwarding over the MPLS backbone network. On an LSP, only provider edges (PEs) need to analyze IP packet headers. As a result, the time to process VPN packets is shortened and the delay of packet transmission is reduced. In addition, MPLS labels are supported by any link-layer protocols.

  • MPLS TE tunnels

    Carriers are generally required to provide VPN users with end-to-end quality of service (QoS) for various services, such as the audio, video, mission-critical, and common Internet access services. MPLS TE tunnels can optimize network resources and offer users QoS-guaranteed services.

Tunnel Configuration Management

The setup and management of tunnels vary according to tunnel types. For example, MPLS TE tunnels are set up and managed using tunnel interfaces, whereas Label Distribution Protocol (LDP) LSPs are automatically set up provided that; if corresponding protocols are configured.

This section focuses on the following aspects:

  • Tunnel interface configuration: You can specify different tunnel types on different tunnel interfaces. The configurations of tunnels vary according to tunnel types.

  • Tunnel management: This function notifies the applications that use a tunnel of the tunnel status and provides tunnel query policies for tunnel selection. The commonly used tunnel management feature is tunnel policy.

Purpose

A VPN uses the tunnel technology to establish dedicated transmission channels to transparently transmit packets on the backbone network.

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Updated: 2019-01-14

Document ID: EDOC1100058940

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