Beta Draft Confidential
21-281/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring PNNI Routing
PNNI Policy-based Routing
Definition of PNNI Policy-based Routing Terms
The following terms are used to define policy-based routing:
Bare Resources — untagged resources and resources of a tagged network entity that
are not assigned to a specific resource partition.
Network Entity (Ne) — a horizontal link, uplink, node, bypass, or a set of reachable
ATM addresses.
Ne-NSC (Network entity NSC) — an NSC that applies to the entire network entity
and advertises properties of the network entity.
NSC (Network Service Category) — a term that indicates whether a network entity
or a set of resources within the network entity is acceptable for carrying a given
connection. When the generic acronym NSC is used, it signifies both Ne-NSCs and
Rp-NSCs.
Policy — a set of requirements on network entities and resources (expressed via
policy operators and lists of NSCs) that may be used to route a connection.
Policy Constraint — an ordered list of one or more policies that must be considered
during call routing and call establishment.
Policy Operator — defines how the list of NSCs specified in a policy are used to
“prune” a network topology map, allowing or forbidding access to resources during
call establishment. Supported policy operators are “require logical set of NSCs” and
“must avoid logical set of NSCs.”
Rp-NSC (Resource partition NSC) — an NSC that applies to a resource partition of
a network entity. A set of Rp-NSCs can be associated to a resource partition.
Tagged network entity — a network entity to which at least one Ne-NSC applies.
Resources of a tagged network entity are considered tagged resources.
Tagged resources — resources to which at least one tagged network entity applies.
Untagged network entity — a network entity to which no Ne-NSCs are associated.
Untagged resources — resources of an untagged network entity, which are not
contained in a tagged resource partition. Note that resources advertised by a PNNI
node that does not support policy routing are untagged resources.
To Next Page
Loading...
Need help?
General
