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NE40E V800R010C10SPC500 Feature Description - Virtual Access 01

This is NE40E V800R010C10SPC500 Feature Description - Virtual Access
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Context Behind IP RAN Virtual Cluster Access

Context Behind IP RAN Virtual Cluster Access


Traditional IPRAN solutions have been developed to maximize carriers' return on investment, reduce network construction costs, and efficiently evolve existing networks into Long Term Evolution (LTE) networks. However, these IPRAN solutions have disadvantages (especially for access rings), as described in Table 2-1.

Table 2-1 Traditional IPRAN solutions and their disadvantages



Complex service planning Large numbers of devices are deployed on the access ring of an IPRAN, and ring topologies, IP addresses, Interior Gateway Protocol (IGP) areas, and tunnel paths must be manually planned.
Complex configurations The following features usually need to be deployed on cell site gateways (CSGs) and access aggregation gateways (AGGs):
  • Border Gateway Protocol (BGP)
  • IGP
  • Multiprotocol Label Switching (MPLS) Label Distribution Protocol (LDP)
  • MPLS traffic engineering (TE)
  • Layer 2 virtual private network (L2VPN) or Layer 3 virtual private network (L3VPN)
Such deployment results in complex configurations and requires a large number of configuration procedures and a great deal of manpower for routine maintenance.
Low troubleshooting efficiency When a device or link on an access ring fails, all devices on the access ring report alarms to a network management system (NMS). Administrators have to locate faults device by device, which results in low efficiency.
Fortunately, IPRAN virtual cluster access overcomes the disadvantages of traditional IPRAN solutions. As shown in Figure 2-1, virtual cluster access is deployed on the access ring. The control planes of CSGs on the access ring are centralized on an AGG. The AGG functions as a controller and calculates routes, delivers forwarding entries, and performs centralized alarm reporting for the entire access ring. Virtual cluster access simplifies network deployment and operation and maintenance (O&M).
Figure 2-1 IPRAN virtual cluster access deployment position

To understand IPRAN virtual cluster access concepts, see Related Concepts.

Updated: 2019-01-03

Document ID: EDOC1100055053

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