Edge router, say again "access router", is located in network periphery (the edge) router. The network center router called core router. Edge router and core router is relative concept, they all belong to router, but with different size and capacity, a layer of core router is another layer of edge router.
Edge router's positioning
Edge router position is the user by LAN remit received wan, in lans and wans technology today, there is a difference of edge router is shouldering many burdens, simply is to meet the user's diverse business needs, from simple to complex network multimedia services and VPN, etc. This requires edge router in the hardware and the software will have the perfect realization ability. The equipment provider so launched fierce competition, derives all sorts of new technology.
A variety of technologies in the edge fusion
In evaluating edge router, at least should check the following technical parameters.
Properties: network processor is a major determinant of performance. Generally speaking, the general network processor can complete the preset programmable ability, far cannot satisfy ever-changing network technology development needs, so a strength of the manufacturers are basically develop their own ASIC chip, these ASIC chip at wire speed processing flow, and the ability to deal with multiple protocols, such as the PPP, frame relay, ATM, etc., will multiple protocols IP protocol data adaptation to and from this point of view, the edge router and will bear all realize future IP network publishing.
Port density and expansibility: operators like port density larger machines, this will give it left wealthy patulous space. Expansion was mainly through piling up to realize, good propagation characteristics will break single box constraints, capacity can on-demand smooth expansion.
Availability: this includes network reliability and equipment reliability. Network reliability depends on a router supported by physical network of SDH/Sonet, etc, the traditional technology is concerned, network has telecommunication level of reliability. For long distance Ethernet is concerned, appeared some new technologies, such as light Ethernet and the 802.17 RPR (Ring) Packet Resilient, but with the rapid spread of the construction of construction.this RPR edge router, should be the necessary characteristics. Equipment reliability depends on the realization of software and hardware level, this needs the implementer determine the optimal system and structure in developing perfusion painstaking care.
MPLS: MPLS is second and third layer fusion technology, equivalent to IP signaling, can provide the fine grain of traffic control and bandwidth high-level management.
Business classification and quality: business classification, and business quality quantitative qualitative, this is users increasingly concerned about part. Because the physical network of business bottom the classification and bandwidth management support on uneven, at present each manufacturer basic has its own proprietary technology. As MPLS techniques, such as mature gradually, edge router will eventually to business classification and quality to achieve the telecommunication level support.
Operations support: edge router is the core equipment of service provider, it must support operators operating requirements, including management, billing, authentication and encryption, etc. Usually router need to provide operational Support system (all) Support by telephone under 0120-2714540 interface and comply with relevant standards.
Based on the user to business and bandwidth insatiable demand, edge router will adopt more technology, with more and more high technical content. In guarantee high-speed connection at the same time, still need to perform a variety of data processing chip maker, it is required to provide advanced network processor chips and transceiver chip, ensure wire-speed level. Edge router also need to have enough problems, such as when the control level software failure and restarts, this move against the impact of load flow should as far as possible the small, which requires the control level keep some state so that the function of data layer does not suffer restart influence it for future realize all the IP network operation has important significance.
Demand is a barometer
Technical progress, needs constant updates, edge router will have to adapt to the new application on the environment, but also, often staying ahead of the standards. Who cater to the market, who is the biggest winner. Judging from the senior agreement, the IP network is direction, edge equipment to be fully satisfy various business for IP bearing proposed requirements, such as safety, mobility and QoS etc. Judging from the transport layer, cost-effective good "light Ethernet + RPR" is the direction, this and future all pay-outs IP network. So, the future of the edge router at least realize IPSec, MPLS, mobile IP and so on several big functions, and provide physical RPR network interface. But in the short term, intracity networks construction is a hotspot, because this will directly meet city the urgent needs of users for bandwidth, and operators at reduced spending on infrastructure formation, the contradiction the solution of the problem lies in whether can provide bottom edge router hardware and software support means, to launch a new, make operators to attract the user's business, thus no more large-scale expansion network.
The future development
Future IP network will bear the nowadays many parallel network conveys business, edge router is these business data gateway, its efficiency directly affect the whole network of operation level. In this user needs sensitive areas, need developers constantly innovation, only firmly grasp the market requirements and technical development direction, to the edge of the network forever survive
Edge router, say again "access router", is located in network periphery (the edge) router. The network center router called core router. Edge router and core router is relative concept, they all belong to router, but with different size and capacity, a layer of core router is another layer of edge router.Edge router's positioningEdge router position is the user by LAN remit received wan, in lans and wans technology today, there is a difference of edge router is shouldering many burdens, simply is to meet the user's diverse business needs, from simple to complex network multimedia services and VPN, etc. This requires edge router in the hardware and the software will have the perfect realization ability. The equipment provider so launched fierce competition, derives all sorts of new technology.A variety of technologies in the edge fusionIn evaluating edge router, at least should check the following technical parameters.Properties: network processor is a major determinant of performance. Generally speaking, the general network processor can complete the preset programmable ability, far cannot satisfy ever-changing network technology development needs, so a strength of the manufacturers are basically develop their own ASIC chip, these ASIC chip at wire speed processing flow, and the ability to deal with multiple protocols, such as the PPP, frame relay, ATM, etc., will multiple protocols IP protocol data adaptation to and from this point of view, the edge router and will bear all realize future IP network publishing.Port density and expansibility: operators like port density larger machines, this will give it left wealthy patulous space. Expansion was mainly through piling up to realize, good propagation characteristics will break single box constraints, capacity can on-demand smooth expansion.Availability: this includes network reliability and equipment reliability. Network reliability depends on a router supported by physical network of SDH/Sonet, etc, the traditional technology is concerned, network has telecommunication level of reliability. For long distance Ethernet is concerned, appeared some new technologies, such as light Ethernet and the 802.17 RPR (Ring) Packet Resilient, but with the rapid spread of the construction of construction.this RPR edge router, should be the necessary characteristics. Equipment reliability depends on the realization of software and hardware level, this needs the implementer determine the optimal system and structure in developing perfusion painstaking care.MPLS: MPLS is second and third layer fusion technology, equivalent to IP signaling, can provide the fine grain of traffic control and bandwidth high-level management.Business classification and quality: business classification, and business quality quantitative qualitative, this is users increasingly concerned about part. Because the physical network of business bottom the classification and bandwidth management support on uneven, at present each manufacturer basic has its own proprietary technology. As MPLS techniques, such as mature gradually, edge router will eventually to business classification and quality to achieve the telecommunication level support.Operations support: edge router is the core equipment of service provider, it must support operators operating requirements, including management, billing, authentication and encryption, etc. Usually router need to provide operational Support system (all) Support by telephone under 0120-2714540 interface and comply with relevant standards.Based on the user to business and bandwidth insatiable demand, edge router will adopt more technology, with more and more high technical content. In guarantee high-speed connection at the same time, still need to perform a variety of data processing chip maker, it is required to provide advanced network processor chips and transceiver chip, ensure wire-speed level. Edge router also need to have enough problems, such as when the control level software failure and restarts, this move against the impact of load flow should as far as possible the small, which requires the control level keep some state so that the function of data layer does not suffer restart influence it for future realize all the IP network operation has important significance.Demand is a barometerTechnical progress, needs constant updates, edge router will have to adapt to the new application on the environment, but also, often staying ahead of the standards. Who cater to the market, who is the biggest winner. Judging from the senior agreement, the IP network is direction, edge equipment to be fully satisfy various business for IP bearing proposed requirements, such as safety, mobility and QoS etc. Judging from the transport layer, cost-effective good "light Ethernet + RPR" is the direction, this and future all pay-outs IP network. So, the future of the edge router at least realize IPSec, MPLS, mobile IP and so on several big functions, and provide physical RPR network interface. But in the short term, intracity networks construction is a hotspot, because this will directly meet city the urgent needs of users for bandwidth, and operators at reduced spending on infrastructure formation, the contradiction the solution of the problem lies in whether can provide bottom edge router hardware and software support means, to launch a new, make operators to attract the user's business, thus no more large-scale expansion network.The future developmentFuture IP network will bear the nowadays many parallel network conveys business, edge router is these business data gateway, its efficiency directly affect the whole network of operation level. In this user needs sensitive areas, need developers constantly innovation, only firmly grasp the market requirements and technical development direction, to the edge of the network forever survive
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