Collapsed backbones are used frequently for connecting departmental LANs within a single building, but less often for connecting building LANs across a campus network because of the increased distances and cabling costs.īackbone cabling should have the highest bandwidth of any cabling in your network, since backbones are used to join together hubs, switches, and routers, linking departmental LANs or subnetworks into building-wide or campus-wide internetworks.
Collapsed backbones generally offer better performance because of the reduced number of hops that traffic must make when passing between departmental LANs.Ĭollapsed backbones are also easier to manage because they bring all the backbone switching and routing equipment into a single room or building. However, collapsed backbones usually have better traffic flow than distributed backbones because of the underlying star topology. The central unit can be located in the building’s main equipment room or, in a campus scenario, in the IS department’s building.ĭistributed backbones generally have a greater degree of fault tolerance than collapsed ones, because the collapsed backbone unit forms a single point of failure. The central unit is often referred to as the collapsed backbone, although this term properly describes the entire configuration. Refers to using cabling to directly join each departmental network’s main hub or router using backbone cabling to a central hub, switch, or router in a star topology (see illustration). In a typical scenario, each floor or building might have a local area network (LAN) and wiring closet containing, among other things, a main hub or router.īackbone cabling is then run between floors or buildings, connecting the main hub or router for each department into a bus-style network (see illustration). This cabling is referred to as backbone cabling, and it connects the hubs, switches, or routers of each network into a single whole. Refers to using cabling to join different departmental networks in a bus topology or mesh topology. These backbones generally fall into two basic categories: Distributed backbone: How does Backbone work?īackbones are primarily used in medium to large-sized networks, such as those occupying a building or a group of buildings on a campus.
#BACKBONE MEANING IN NETWORKING SOFTWARE#
Security services can be designed around the needs of the network, including hosting (physically or virtually) a security stack distributed in the Evolving Networks Software Defined Network (SDN) backbone, or using cloud based security services such as Cisco Umbrella.Two types of backbone: distributed and collapsed. Hosting and Colocation is available within the datacentres the NFRs are hosted in, meaning apps and data can be relocated to the centre of a network. Customised backbones for networks #Įach organisation requires different amounts of bandwidth, resilience and access to services.īackbone solutions can be designed to include internet transit, cloud transit, connections to third party datacentres and networks, ZTNA solutions such as Zscaler.
#BACKBONE MEANING IN NETWORKING MANUAL#
There is no centralised orchestrator or monitoring platform making these decisions, and no reconfiguration or alternative temporary configuration is applied.Īs soon as the failed NFR is restored and passes a health check, the routes are restored and propagated to each EVX without manual intervention. This decision is made independently by each EVX edge node. If a datacentre NFR can no longer send or receive data, then its route is dropped and the next preference is used automatically. No automatic reconfiguration #ĭatacentre availability detection is achieved through routing preference. This way the entire network is always used, but half of the backbone components are ready to receive 100% of the connected sites. Spine and leaf topology #ĭifferent topologies are possible, but the default is spine and leaf, where each edge node (EVX) is connected to muliple Network Fabric Routers ( NFRs), each in a different geographically located datacentre.Įach site in this network is connected simultaneously to both datacentres, yet each datacentre is the primary for only half the connections. We prefer using the term backbone to describe the upstream decentralised services that generally act as (at a minimum) transit hubs for the edge sites.
The term "core" is overused and often misleading in networking terms. Network backbone Core networking reinvented #
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