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The core network provides high-speed, highly redundant forwarding services to move packets between distribution-layer devices in different regions of the network. Core switches and routers are usually the most powerful, in terms of raw forwarding power, in the enterprise; core network devices manage the highest-speed connections, such as 10 ...
The core layers contain (k/2) 2 core switches where each of the core switches is connected to one aggregate layer switch in each of the pods. The fat tree topology can offer up to 1:1 oversubscription ratio and full bisection bandwidth, [ 3 ] depending on each rack's total bandwidth versus the bandwidth available at the tree's highest levels.
A backbone or core network is a part of a computer network which interconnects networks, providing a path for the exchange of information between different LANs or subnetworks. [1] A backbone can tie together diverse networks in the same building, in different buildings in a campus environment, or over wide areas.
A network switch is a multiport network bridge that uses MAC addresses to forward data at the data link layer (layer 2) of the OSI model. Some switches can also forward data at the network layer (layer 3) by additionally incorporating routing functionality. Such switches are commonly known as layer-3 switches or multilayer switches. [2]
The network will also have a hierarchy: core, distribution (aggregation), and access. The core in most cases is an existing IP/MPLS backbone but may migrate to newer forms of Ethernet transport in the form of 10 Gbit/s, 40 Gbit/s, or 100 Gbit/s speeds or even possibly 400 Gbit/s to Terabit Ethernet network in the future.
It is a small (1U) switch with a high port-density and can be used as distribution or (collapsed)core switch for campus networks and for use in the datacenter it offers features such as loss-less Ethernet for iSCSI and FCoE, data center bridging (DCB) and iSCSI Auto-configure [19] The PCT8100 series is a "multi-layer" switch which can be used ...
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Cisco CRS-1 Backbone Core Router. A core router is a router designed to operate in the Internet backbone, or core, or in core networks of internet service providers. [1] To fulfill this role, a router must be able to support multiple telecommunications interfaces of the highest speed in use in the core Internet and must be able to forward IP packets at full speed on all of them.