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Core network aspects 1
Figure 4 – Categories of physical resources
A physical node resource is composed of transport resources, computing resources, and storage resources
in an administrative domain. Data frames/packets are sent and received in a physical node resource through
one or more physical link resources.
7.2 Virtual resources
Virtual resources are classified into two categories: virtual link resources and virtual node resources. Virtual
link resources are created using physical link resources, and virtual node resources using physical node
resources. A virtual link resource may consist of a single layer, such as VLAN, or a combination of multiple
layers, such as GRE and IP.
7.3 LINPs
A LINP is created using virtual link resources and virtual node resources. Figure 5 shows an example of a LINP,
which consists of three virtual node resources and two virtual link resources.
Figure 5 – An example of an LINP
7.4 Allocation and binding
The relationship between a virtual resource and its constituent physical resources is called mapping. Based
on the mapping, one or more specific physical resources are allocated to one or more virtual resources.
Likewise, the relationship between a LINP and its constituent virtual link and node resources is called
mapping. Based on the mapping, specific virtual resources are allocated to a LINP. Figure 6 depicts these
relationships.
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