Nt1310 Unit 3 Assignment Of Isp
As mentioned before in Section II.B, the typical ISP is split up into multiple functional operators.
InP – as seen in the figure, the InP manages the physical network infrastructure and is responsible for resource allocations and mapping physical resources to virtual resources. Changes made in this level are not visible to the levels above. InP is responsible for the network maintenance, if one node goes down in this level then it can affect multiple virtual nodes, for example in Fig 1. The nodes pointed by the Revisitation arrow in VN2 are mapped to a single node in the physical substrate. [7]
SP – service provider designs and implements services and policies based on customer requirements. It manages the network operations and network design. It can use …show more content…
[8]
End User – Are the same as end users in the present day. The end user is not aware of how the network is constructed and interacts with the SP the user is subscribed to.
B. Setting up a Virtual Network
The VNP or SP designs the VN and provides a list of resources and their expected configurations to the InP. The InP first checks if it has the resources to support the proposed VN and then maps physical resources to the virtual resources. [8]
The VNP needs to be aware of the geographical constraints of the InP even if it is ignorant of the underlying architecture. The edge routers of the VN should be in the same locations as its customer/user so that they can access the network. The location of the edge routers is one of the configurations parameters supplied to the InP. This makes it easier to choose edge routers, as there might be a limited number of routers in the given location. [8]
The InP chooses the core routers based on requested configurations and the states of the routers in the network determined by the number of virtual machines, bandwidth availability to name a few.
InP – as seen in the figure, the InP manages the physical network infrastructure and is responsible for resource allocations and mapping physical resources to virtual resources. Changes made in this level are not visible to the levels above. InP is responsible for the network maintenance, if one node goes down in this level then it can affect multiple virtual nodes, for example in Fig 1. The nodes pointed by the Revisitation arrow in VN2 are mapped to a single node in the physical substrate. [7]
SP – service provider designs and implements services and policies based on customer requirements. It manages the network operations and network design. It can use …show more content…
[8]
End User – Are the same as end users in the present day. The end user is not aware of how the network is constructed and interacts with the SP the user is subscribed to.
B. Setting up a Virtual Network
The VNP or SP designs the VN and provides a list of resources and their expected configurations to the InP. The InP first checks if it has the resources to support the proposed VN and then maps physical resources to the virtual resources. [8]
The VNP needs to be aware of the geographical constraints of the InP even if it is ignorant of the underlying architecture. The edge routers of the VN should be in the same locations as its customer/user so that they can access the network. The location of the edge routers is one of the configurations parameters supplied to the InP. This makes it easier to choose edge routers, as there might be a limited number of routers in the given location. [8]
The InP chooses the core routers based on requested configurations and the states of the routers in the network determined by the number of virtual machines, bandwidth availability to name a few.