C114 News July 9th (Jiang Junmu) "In the real world of the real market, even if price competition is fierce to the extreme, buyers will also consider other factors besides price." The founder of modern marketing 1. The marketing guru Theodore Levitt wrote in the book "Marketing Imagination".
Dedicated line service has always been an important piece of the operator’s business puzzle, especially in recent years, as the proportion of overall revenue has been rising, becoming an important breakthrough for operators to explore the government and enterprise markets and achieve value growth . However, the development model driven solely by bandwidth has inevitably caused the homogeneity of dedicated line products, intensified competition in the same industry, and brought the risk of a decline in ARPU. At the moment when signs of low-price competition have emerged, perhaps only Only by implementing differentiated development strategies can there be a future. Fortunately, operators seem toHave realized this.
Before and after the "5·17 World Telecommunications and Information Society Day" this year, operators in many provinces held dedicated line conferences. After watching the live broadcasts of several press conferences, the author found that the new dedicated line products released this year are quite different from previous years. In addition to bandwidth, they provide more and richer features and give government and enterprise customers more choices. Traditional thinking.
One of the intelligent IPRAN dedicated lines also attracted the author's special attention. Firstly, IPRAN is generally used for base station backhaul, and how does it have to do with dedicated lines; secondly, let’s look at the introduction of this product, which is fast, flexible, safe and reliable, and extremely cost-effective. What is the principle behind it? After communicating with experts from operators and manufacturers, the author has a general understanding of the intelligent IPRAN dedicated line. Today, I will come to "learn now, sell now" and have a good chat with everyone about this topic.
Start with traditional dedicated lines
The traditional private line service of operators is usually called "dual line", which refers to the dedicated network line and the Internet private line. Some people may ask "isn't there another type of cloud dedicated line?" I think that the cloud dedicated line can actually be classified It is a scene of dedicated network connection, which will not be described separately hereUp. The Internet needs of enterprises are met through dedicated Internet lines. At the same time, there may be multiple branches in the enterprise, and multiple branches need to be connected, or the office and data center need to be connected. How can this be achieved?
Traditionally, there are three schemes: The first way is to use the public network, that is, through the Internet dedicated line, but the public network is not secure, and your privacy may be snooped by others. The second way is to connect them by renting a dedicated transmission line. This is a local tyrant's approach and requires a lot of money. The third method is to use VPN to connect. This method is a compromise and is not expensive.
The last two schemes mentioned above are dedicated lines for networking. Operator dedicated lines for networking are mainly divided into transmission dedicated lines and IP. The network corresponding to the transmission dedicated line mainly includes SDH/MSTP, OTN, DWDM/ROADM; the network corresponding to the IP dedicated line mainly includes backbone network and metropolitan area network, IPRAN.
The dedicated transmission line provides point-to-point networking circuits, which are mainly for customers who require bandwidth/stable performance and hard isolation rigid pipes, such as finance, party, government, and military, etc., of course, the price is also the most expensive. Prior to the construction of the IPRAN network, major customers such as the party, government, military, finance, etc. will prefer to use the hard pipe MSTP for bearer, which is the biggest contributor to the development of operators' dedicated lines. However, with the gradual increase in user service bandwidth and continuous changes in customer needs, MSTP networks continue to carry dedicated lines with many problems, including insufficient core aggregation capacity, operator policy restrictions on MSTP investment, long time for some old equipment, and Long-term operation risk is high, high power consumption and high floor space, etc. At the same time, the MSTP network is already in a period of industrial decline, and various equipment manufacturers do not have an intelligent evolution plan for MSTP, which cannot meet the visible and manageable needs of customers.
IP dedicated lines are mainly for multi-point to multi-pointMPLS VPN is used to provide IP virtual private network for government and enterprise customers, providing logically isolated flexible channels, and high networking flexibility. The traditional MPLS VPN dedicated line supports multiple access methods of MSTP/OTN/IP RAN/fiber at the end, and the backbone network in the middle uses light load to ensure the stable operation of the business. This dedicated line program is also very mature, but there are also obvious problems. First, multiple access methods cause the network to be not a unified standard, poor visibility, difficult operation and maintenance, massive alarms, difficult to track, and it is difficult to achieve end-to-end unified visual management and operation and maintenance; second, multiple Network hybridization leads to difficulties in intelligent evolution; third, operators want to see the SLA of tenants' dedicated lines, and tenants want to monitor the quality of the operators' dedicated lines and the SLA is guaranteed. These are difficult to support.
The past and present of IPRAN
Because the shortcomings of traditional private lines are very obvious, and the homogeneity of products is becoming more and more serious, operators have embarked on the road of building differentiated competitiveness through intelligent network transformation. IPRAN, as a type of IP dedicated line, is the fastest in the intelligent evolution of operators.
IPRAN initially showed its talents in base station backhaul—traditional base station backhaul networks are based on TDM/SDH, but as data services in the 3G/4G era become the main bearer, SDH’s traditional TDM exclusive channel The network expansion model cannot support the rapid growth of the market’s demand for bandwidth. The packetized bearer network construction model has gradually become the mainstream. China Telecom and China Unicom have basically started IPRAN pilot projects in key cities in 2011, and launched large-scale IPRAN construction in 2012.
As a full-service operation with a good market foundation in the mobile and fixed network fieldsChina Telecom and China Unicom clearly hope to make the best use of their products, and consider the degree of network support for integrated services while building the IPRAN bearer network. Applied in the field of dedicated lines, IP RAN uses Layer 3 emulation and Layer 2 to provide point-to-point pseudo-wire services, and its technical characteristics are similar to those of MPLS VPN. Its advantage lies in the use of packet technology as the core, with QoS classification and other functions, which is more suitable for the carrying of Ethernet dedicated lines; and the router as the core, which coincides with the enterprise network and government network mode, and is conducive to the rapid business of major customers in the future expand.
After nearly ten years of continuous construction, the two operators have deployed IPRAN networks with hundreds of thousands of devices, which satisfactorily carry the needs of 3G, LTE, and unlimited traffic, and have carried out pilot projects for carrying 5G services . In terms of network coverage, this is the “widest coverage” network, which almost completely matches the location of the enterprise; from the perspective of bearer servicesIt is said that this is the most "simple" network, and only base station backhaul and dedicated line service traffic are running inside; in terms of network load, the overall network is still at a light load level, from the superposition of visible 5G traffic. Look, there is also a larger capacity that continues to bear the demand for more dedicated line services.
These advantages and characteristics make IPRAN dedicated line products have a very rich use of scenarios, such as party, government and military, financial non-core business networking (video surveillance, video conferencing, etc.) that require relatively high security and reliability. Etc.), as well as multi-branch enterprises and institutions chain organization networking or cloud access. So far, China Unicom has launched cloud networking products based on IPRAN networks and provides nationwide networking services. China Telecom has also launched cloud-network integration packages based on IPRAN networks.
Three reconstruction-driven dedicated lines for intelligent upgrade
After talking about the past and present of IPRAN, how did it turn around? The author believes that it can be boiled down to "three reconstructions", namely network reconstruction, product reconstruction and service reconstruction, which are also the main means for operators to intelligently upgrade traditional private line products.
Network reconstruction is the foundation: To realize intelligence, we must first have a basic network with sufficient coverage, large capacity, and sufficiently advanced technology, and a series of transformations to the existing network are required. Including CPE pre-deployment to respond to rapid enterprise activation; access ring GE upgrades to 10GE on demand, which can evolve to 50GE in the future, convergence core upgrades to 200G on demand, to ensure sufficient business capacity; open up multi-cloud connections and implement cloud backbone networks" One point into the multi-cloud"; build the core of the province to realize independent management of dedicated lines in the province; deploy SDN to realize network intelligence; introduce FlexE technology and SRv6 to achieve more reliable and flexible managementRationale.
Product reconstruction is a selling point: Based on the intelligently reconstructed IPRAN network, operators can change the state that dedicated lines could only sell bandwidth in the past, and introduce flexible networking, rapid deployment, customer self-service, and SLA New dedicated line products featuring high visibility, safety, reliability, etc., provide a nationwide flexible intelligent dedicated line to meet customers' various networking requirements from point-to-point, point-to-multipoint, and multipoint-to-multipoint.
At the same time, as an important means for enterprises to embrace digital transformation, "going to the cloud" has swept all walks of life, and enterprises' demand for cloud-network integration services is also increasing. Operators' cloud-network integration business has entered from 1.0 In the 2.0 stage, from providing basic rack virtual machines and dedicated line IAAS package products, to "cloud network" as the core to gather more and more ecological partners to provide "cloud + network + X" integration package (X means each SaaS-like service), intelligent IPRAN cloud dedicated lineIt is an important competitiveness for operators to develop "network + cloud + X", which can provide cloud-network integrated products and realize cloud-network end-to-end automation.
Service reconstruction is the guarantee: Service reconstruction represents the experience of the ultimate enterprise customer, and it is also the customer perception point for the special line products to provide differentiated capabilities. IPRAN special line can bring customers "fast, sensitive and promising" The new service experience. "Fast" means rapid provisioning, "sensitive" means business agility, and "promise" means SLA can be guaranteed and guaranteed-I believe that "promise" is the most important point. With a promiseable SLA, enterprises can rest assured to use IPRAN dedicated lines. No need to worry about quality issues and black box management anymore.
In terms of rapid deployment, it often takes several days or even longer for traditional private line services to start because the network is not planned in advance. IPRAN covers a wide range of networks, and almost every base station has integrated access equipment. According to statistics Value enterprise in the main cityThe average distance from the IPRAN access point is less than 350 meters, and enterprises can quickly access the IPRAN network; IPRAN equipment interfaces are rich, supporting multiple service access such as FE/GE/10GE/E1/STM-1, and the enterprise-side terminal CPE equipment supports that Plug-and-play, swap-and-talk, and quickly and automatically go online in 2 minutes; based on the SDN management and control platform, it can realize automatic service delivery.
In terms of business agility, IPRAN has the characteristics of flexible networking, based on the natural flexibility of IP (when IP is reachable, business can be connected), enterprise branches can quickly access, and support large-scale networking; IPRAN The network can also be multi-purpose on one line, supporting multiple scenarios such as dedicated networking, Internet dedicated, and cloud dedicated lines.
SLA can be promised and guaranteed. The intelligently upgraded IPRAN dedicated line is based on ETH OAM/TWAMP/iFIT+Telemetry and other technologies realize real-time visibility of pipeline-level/application-level SLA (delay, jitter, packet loss), and customers can monitor service quality by themselves; after a problem occurs, it can quickly delimit the fault within 30 minutes based on SDN control, helping operation and maintenance personnel Resume business quickly. FlexE and SRv6 are the key points to guarantee the promise of SLA. The former can achieve physical isolation within the port based on time slots to ensure that services do not affect each other and meet customer security and stability requirements; the latter can implement SLA-based service routing and Real-time optimization of the path is like intelligent navigation. In addition, the availability of dedicated lines is a hard indicator. The intelligent IPRAN dedicated lines provide redundancy of key components, CPE dual uplink access, dual paths, fast detection, 50ms fast protection switching in the event of a failure in any network topology, and single-hop delay for the entire network. <50 microseconds, to achieve up to 99.99% availability, while dedicated line end-to-end delay and SDHIt is equivalent to meet the needs of various services.
IPRAN is undoubtedly a new treasure for operators’ private line services. With the continuous advancement of the three reconstructions, it is believed that the intelligent quality private lines launched by operators based on the IPRAN network will provide government and enterprise customers with more characteristic products and better experience services, and help the digital transformation of thousands of industries success.
SRv6 will become the future evolution direction of dedicated lines
In the end, let’s talk about SRv6, which has been mentioned frequently above. The full name of SRv6 is segment routing based on IPv6, which combines the advantages of IPv6, SR, and SDN technologies, and lays a solid foundation for simple, flexible, and programmable networks.
IPv6 not only brings address expansion capabilities, its IP header is simple, flexible, and highEffective, easy to expand, and flexible programming capabilities, the combination of IPv6 and SDN technologies can provide more intelligent and flexible service deployment capabilities. SR is a source routing protocol that not only retains the capabilities of MSLP, but also cancels the traditional LDP and RSVP label distribution protocols, which greatly simplifies network deployment. However, SR based on IPv4 networks still needs to provide tunneling technology through MPLS. SRv6 relies on the flexibility of the IPv6 address and supports the tunnel function through the expansion of the IPv6 message header, thereby canceling the MPLS forwarding bearer technology and unifying common IP forwarding and tunnel forwarding.
Specifically, the author believes that the value of SRv6 in the field of private lines mainly has the following points: First, SRv6 uses IPv6 addresses, which are naturally reachable and aggregated based on the large address space; 2. Simple protocol, same as traditional MPLS dedicated line networkWhen it is necessary to maintain multiple control panel protocols such as LDP and RSVP-TE, SRv6 uses only IGP/BGP in the control plane, which simplifies operation and maintenance and effectively reduces OPEX; third, SRv6 is based on source routing technology and is the de facto standard application of SDN. Path control can be performed on a pure IP forwarding network, with the advantages of global optimal path and intelligent distribution; fourth, SRv6 can achieve 50ms protection switching coverage in any topology; fifth, smooth evolution on demand, only PE at both ends are required at the beginning The node upgrade supports SRv6, and the intermediate nodes support IPv6 to achieve rapid service opening. Later, the intermediate nodes can be upgraded on demand and can have flexible path planning capabilities. Sixth, SRv6 has strong programmability, making the network a platform or rather One market, realize the service chain, flexibly set the required services, and provide personalized SLA in real time.
Foreseeable, SRv6In the future, it will shine in the field of dedicated lines.