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NE40E V800R010C10SPC500 Feature Description - Virtual Access 01

This is NE40E V800R010C10SPC500 Feature Description - Virtual Access
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Typical Scenarios and Networking of Virtual Access

Typical Scenarios and Networking of Virtual Access

Usage Scenarios

Virtual access is typically used for MAN virtualization in a fixed broadband (FBB) solution. Services carried include VoIP, HSI, VoD, IPTV, and IP VPN. Deploying a virtual access system on a MAN can virtualize the entire MAN as one or several devices to simplify the network, decrease network deployment and service configuration workloads, and reduce O&M costs. A master in the virtual access system functions as a physical connection device between a backbone network and MAN and as a service control point on the MAN. The master supports comprehensive IP/MPLS networking capabilities on the backbone network side. On the MAN side, the master provides multi-service access and authentication control for home users, and also provides high-quality Layer 2 and Layer 3 VPN leased line services for leased line users.

The typical usage scenario of virtual access is BNG metro virtualization. On the network shown in Figure 3-3, the virtual access system presents two BNGs that share downstream interfaces to the user side. A routing protocol and MPLS must be deployed on the BNGs and backbone network devices.

Figure 3-3 BNG metro virtualization

Networking Topology

The virtual access system can automatically deploy an extended IS-IS protocol to automatically discover the internal network topology. The networking topologies supported by the virtual access system include tree and ring topologies, as shown in Figure 3-4.

  • An AP can be single-homed to a master or dual-homed to a primary and secondary master.

  • Multiple links are supported between a master and AP and between APs. The virtual access system uses the hash mode to evenly balance loads among multiple links.

Figure 3-4 Topology types supported by virtual access

The user access-side topology in virtual access refers the network topology where CEs are connected to APs. Figure 3-5 shows the user access-side topologies supported in virtual access network.

  • A CE is single-homed to an AP through a single link.

  • A CE is single-homed to an AP through multiple links. Load balancing is performed among the multiple links.

  • A CE is dual-homed to APs (not recommended). The CE can be only single-linked to each AP. Multi-link load balancing is not supported.

Figure 3-5 The user access-side topology
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Updated: 2019-01-03

Document ID: EDOC1100055053

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