Virtual Private Network (VPN) refers to the customer connection deployed on the basis of sharing in the same policy as the private network. Its applicability to customers includes the branch structures of the company connected to the internal network through the VPN between sites, employees who connect to the remote office through the VPN, mobile users, and other enterprises connected to the external Network VPN.
The combination of MPLS and VPN has a strong value-added feature RFC 2547bis ). This greatly satisfies the network requirements of enterprises for their new business needs.
"One Netcom" that rapidly improves work efficiency"
With the development of business applications, enterprises have more and more demands for internal network applications. Among them, various business features include: basic IP Application, arbitrary connection to any, various applications to guarantee real-time, key tasks, as well as the bearer of burst services, various bandwidth. Such requirements encourage various VPN aspects to improve support for customer services. Diversified telecom business trends
The trend for enterprises to use telecom services is to gradually outsource telecommunications-related services. Before enterprises start outsourcing, most of the application services except circuit connections are independently established and managed by enterprises. From January 1, we can see that the enterprise market has seen the trend of outsourcing router ownership and Installation Management to telecom service operators. These outsourcing services require telecom service providers to implement network policies and management. At the same time, outsourcing services also provide telecom service providers with a new market. This requires telecom service providers to increase their self-reliance so that enterprises can use them with confidence and outsource more services to them.
Multiple requirements of the ip vpn Network
From the analysis of the market and the analysis of VPN technology, we can see that the new ip vpn must have the following features to meet the new market needs.
1. Flexibility: Any connection can be implemented;
2. Speed: seamless connection between internal and external networks;
3. QoS: Provides service quality control for different services;
4. Security: security of key services is very important to enterprises;
5. service level and SLA: service level and service level agreement provide service guarantee for enterprises;
6. transparent transmission: supports transparent transmission of private IP addresses;
7. Support for new value-added services;
8. enterprises can monitor their own VPN networks;
9. e-implementation e-Enable) Infrastructure: enterprises are well-equipped with the infrastructure for implementing new businesses.
MPLS for new requirements
The emergence of MPLS satisfies all the network requirements of the above enterprises. The technical features of MPLS meet the requirements of flexibility, speed, QoS, and security of connections. Therefore, more than 140 telecom carriers around the world have adopted the MPLS/VPN solution. At the same time, MPLS/VPN also provides traffic design to support higher network utilization and elasticity. The virtual leased line features guaranteed bandwidth technology to expand TE with QoS, it ensures point-to-point protection, and bandwidth protection services enable telecom operators to achieve the same protection effect as sonet aps.
MPLS network architecture smart IP VPN
Traditional FRATM and IP Tunnel VPN are connection-oriented. Each site is equivalent to each other. When there are many sites, the connection line and cost will be very high. The VPN implemented by the MPLS network is non-connection-oriented, and its VPN is "Built-in". Therefore, each site is only equivalent to the network of the service provider, and many connections are not allowed between sites, at the same time, it can support multiple business types of connections, which reduces the cost.
Through Cisco's MPLSVPN solution and some technical features of CiscoIOS, various internal networks of the company are connected with telecom operators to ensure interoperability and value-added access, the Intranet and external networks are extended in the MPLS networks of telecom carriers. At the same time, both enterprises and telecom operators use Cisco network equipment and solutions to ensure maximum network usage.
Cisco's MPLSVPN network has been widely used by major telecom carriers around the world. China Telecom, China Netcom, and China Unicom all use cisco's MPLS solution to provide services to customers.
Benefits for telecom operators
The Cisco MPLS solution first creates new IP revenues for telecom carriers, and secondly reduces their infrastructure CAPEX) and support costs (OPEX ), third, service personalization and voice, video, and data integration can be achieved. Fourth, end customer loyalty can be achieved by bundling a number of value-added services on the integrated infrastructure. Fifth, it has a flexible architecture, global Service Support is achieved through global IP coverage.
The Cisco MPLS solution also provides a lot of value for end users. It reduces network construction and operation costs, simplifies network operations, extends the connection between internal and external networks, and provides universal access to IP services on a global basis, add, delete, and change as needed, and obtain support from professionals through outsourcing, so as to focus on the main business.
Complete mpls vpn solution
For service providers, Cisco provides a complete solution. The internal VPN network can be connected with different users and different services. Service providers use Cisco IOS software features to determine the value-added services required by customers, this includes implementing and managing unified information transmission, content hosting and management over multiple MPLS VPNs in a simpler and more economical manner, Internet access management, service quality QoS, and Virtual Private Network VPN and security.
Value positioning of MPLS VPN
The value of mpls vpn is embodied in five ""
Any to any) is more flexible than DDNFR.
Ubiquitous any where) supports ANY last-mile access technology
ANY multimedia any media) QoS for video and Speech data applications
Add service added services) revenue sources on the same converged network
Other options: ALTERNATIVE) for the parallel network provided by careful customers such as OA or backup higher throughput and reliability than ISDN from core network to external network, from access service to mainframe integration. The MPLSVPN network provides carriers with a full range of services.
Mpls vpn free space
Some users doubt the security and reliability of MPLSVPN. Cisco has long proved in many ways that MPLSVPN is superior in terms of security and reliability.
Security
A IP-VPN test of MPLS tested against multiple IP-VPN technologies has tested that "Cisco MPLS-based IP-VPN provides Frame Relay with equivalent security without encryption ".
The burton group summarized the mpls-based VPN in its 2nd network and telecom strategy report: "MPLS technology is now mature enough, and telecom operators can use it to build layer-7 and layer-3rd VPNs. Currently, most MPLS-based VPNs are Layer 2 VPNs. However, the 2nd-layer VPN should also be widely deployed next year. MPLS-based VPN is as secure as traditional FR and ATM services ."
These research reports prove that MPLSVPN, like traditional FR and ATM services, can provide carrier-level security.
Telecom-grade Reliability
From the perspective of telecom-level reliability, the IP + ATM architecture IPFR of MPLS technology provided by Cisco has achieved 99.999% reliability for one year in a row. AT&T and Cisco work closely together to ensure that these requirements are met in the AT&T network.
AT&T used Cisco's IP + ATM Multi-Service Switch to launch its IP-type frame relay IPFR service in January 1999. As high availability becomes more and more important to enterprises, AT&T has been leading the industry in the development of frame relay network functions. It also applies its network to Internet Protocol applications such as virtual private networks.