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Maximum Allocation Multiplier (MAM) attribute |
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| MAM is an administratively configurable
attribute which determines the proportion of the resource that is available
for allocation to TTs. The attribute is mostly applicable to link
bandwidth, however, it can also be applied to buffer resources on
LSRs. |
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| Values of MAM can be chosen so that a resource can be
under-allocated, this is, when the aggregate demands of all
TTs (based on TT parameters) that can be allocated to it are
always less than the capacity of the resource, and over-allocated,
when the aggregate demands can exceed the capacity of the resource. |
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| Under-allocation can be used to bound
the utilization of resources, however, under MPLS this posibility
is more complex because some flows are routed using conventional hop by
hop protocols, without consideration for resource constraints. |
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| Over-allocation can be used to take
advantage of the statistical characteristic of traffic, where the peak
demands of TTs do not coincide in time. |
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Resource Class attribute |
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| This attribute expresses some notion of "class" for resources. They
can be viewed as "colors" assigned to resources such that the
set of resources with the same color conceptually belong to the same
class. |
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| These attributes can be used to implement a
variety of policies. The key resource are links. The concept is a powerful
abstraction which can be used to: |
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- Apply uniform policies to a set of resources that do not need to be in
the same tolological region.
- Specify the relative preference of sets of resources for path
placement of TTs.
- Explicitly restrict the placement of TTs to specific subsets of
resources.
- Implement generalized inclusion/exclusion policies.
- Enforce traffic locality containment policies.
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