Science and Technology with the Ethernet access solutions day-Ethernet, access – Communications Industry
In the network construction, all access layer switches, multi-service functions to solve the flow of information streaming and aggregation, on the one hand, network access and aggregation layer by layer and backbone network connection, the building or sub-region point to connect all the information up, on the other hand, various forms of network information is gathered up and delivery to the trunk, where the network is the network administrator apply isolate network traffic between strategy, including security, routing convergence, network fault isolation.
Network access layer is also responsible for the introduction of user traffic network, and to achieve access control, including access to the speed limit and so on. We propose different network access points according to different requirements of each network access point in different types of switches, such as Catalyst4000, 3500,2900 and other switches.
Order to more effectively manage user access and security control, we recommend the division in the access layer VLAN (virtual network), so that different functional departments, users in different virtual network, virtual network between communication mainly by the convergence layer and backbone layer Catalyst6x00 multilayer switches to achieve. To achieve the different virtual network users, and even within the same virtual network between different users access control can be set in Catalyst6x00 access control list (Access Control List) to achieve. With Catalyst6x00 the PFC and the MSFC, we can achieve, while L3 switching, wire-speed for ACL processing.
Residential customers online business: The user group for the current major broadband service targets, and real profits for future growth.
Residential users access methods We provide access for the user way, optical fiber access cell. 10M Ethernet access home desktop. Specific access as follows:
District with fiber optic access to provide the upper 1000M 100M, or joint interface;
Cell in each building within the home side a Ethernet switch, providing the user interface, 10M; the way clients access the necessary equipment and the price: five types of cell within the need to lay cable, user terminals with a 10 card, the price is 70-100 dollars;
Characteristics of the access way: for the end users export the most inexpensive, high-speed bandwidth, and client cost is negligible, is well placed to promote the use of a large scale.
Access to the technology plot have a certain degree of complexity. We analyzed in detail as follows: the edge of the cell layer for the access point, the situation according to the user's access bandwidth and using different access methods. For high-volume residential users to the Internet, using the exchange capacity of the larger switch ports connected via gigabit switches to the core points; and the Internet, the current user is not a big plot, with medium exchange through Fast port switch connected to the core point, future demand for the user to install Gigabit modules can be connected to expand the capacity. Floor network device can use a small Ethernet switch.
Achieve the conditions necessary for the network:
Fiber was spread into the cell;
District within five cable laying work is completed;
Overall network to reflect the following principles:
Edge access switch box to connect directly through the transfer to the core access switch.
Core switch with modular structure, the third layer switching capacity, high Gigabit port density and high reliability.
Edge access switches use fast switching capability and flexible VLAN classification technology, and support for Gigabit on the link, to support user access security.
Hierarchical network management technology: the equipment can be centralized management, user management cost situation can automatically lock the corresponding port, control the number of concurrent users to connect the equipment to support secondary development.
Security and control of cell users
VLAN security measures Ethernet broadcast method used to achieve packet transfer between users, any user to send data reported before see their ARP cache if the MAC address of a target user, if not then the whole network broadcasting, and the user's ARP cache refresh time to time, thus there is a lot of ARP Ethernet broadcast packets.
Switching technology to provide each user a dedicated network bandwidth, but does not reduce the broadcast domain size. The plot, if not using any technology, any one cell in a computer package will be sent broadcast throughout the cell, or even all communities in the forwards. This one will waste a lot of network bandwidth, on the other hand because all residential / all floors in a broadcast domain, the network lost its security.
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