Terms and Definitions

The following table lists terms and definitions used in this feature configuration discussion.

Feature Configuration Terms and Definitions

Term	Definition
adjacency	A direct connection between IS-IS routers.
area	An area is a logical segmenting of an IS-IS domain for purposes of simplifying network management.
domain	An IS-IS network administered by a single organization.
hello packets	An IS-IS packet type used to initialize and maintain adjacency between neighboring intermediate systems.
intermediate system	A router in an IS-IS context.
Intermediate System to Intermediate System (IS-IS)	IS-IS is an interior gateway link-state routing protocol, defined in ISO 10589, operating by reliably flooding link state information throughout a network of routers within an administrative domain.
link state PDU	An IS-IS packet type used to exchange a router‘s link state information with other routers in the IS-IS network.
Network Entity Title (NET)	The portion of the NSAP that contains the system ID and the selector field.
Network Service Access Point (NSAP)	An addressing scheme to identify IS-IS intermediate points and the area they belong to.
router level	One of three possible levels (L1, L2, and L1 and L2) assigned to a router to determine whether route exchange is limited to an area or can be between areas.
sequence number PDUs	An IS-IS packet type used to ensure that neighboring intermediate systems are aware of the most recent LSP from every other intermediate system.

Published May 2016prev | next