Data networks

Data network is a foundation for majority of provided services such as: IP telephony, IP TV, server application client, services for joint personal work, etc. So that many security, availability, reliability and productivity demands are made to a data network. This requirements are implemented by building a network as modular multilevel architecture.

Depending on the network size and provided services, it may consist of such layers: core, distribution, access, aggregation. As well it consists of different number of modules: the access module to storage systems and server application client, the access module to the global network, remote worker access module, monitoring and network control module, etc. In a modular multilevel architecture each layer is responsible only for its own functions. This approach simplifies development, installation and maintenance, ensures network enhancement without considerable expenses.

Core layer ensures:

  • Productivity and reliability equally with maximal simplicity and unification.
  • Different services data isolation (MPLS L3 VPN).
  • High main lines availability and active equipment redundancy.


    • Distribution layer insures:

  • Reliability, balancing, allocation and QoS.
  • Aggregation access layer and channels in main line.
  • Line of demarcation, main line protection from redundant peering and disturbance on the access layer.
  • Aggregation routing information, fast convergence, loading balancing through simultaneous channels in the main line. First Hop Redundancy Protocols (FHRP): ESRP HSRP, GLBP, VRRP for default gateway redundancy.
  • Protocol Independent Multicast


    • Access layer ensures:

  • L2/L3 functional for reliable IT-infrastructure foundation: PVST+, Rapid PVST+, EIGRP/OSPF, DTP, PAgP/LACP, UDLD.
  • Intellectual network services: QoS, IP Multicast, IGMP Snooping, etc.
  • Integrated security functional: port security, DHCP snooping, Dynamic ARP Inspection, Extensible Authentication Protocol,  802.1x with enhanced capabilities.
  • Power pluggable devices: IP phones, Wi-Fi access points, IP cameras, etc.
  • Different application traffic isolation.
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