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Glossary
Access Control List (ACL)
List the SSR keeps to restrict Layer 3/4 traffic going through the router. Each ACL or each
list consists of one or more rules describing a particular type of IP or IPX traffic. An ACL
can be simple and consist of only one rule or complicated with many rules. Each rule tells
the router to either permit or deny the packet that matches the rule's packet description.
For more information on ACLs and rules, refer to the SmartSwitch Router User Reference
Manual.
Adjacency
An OSPF relationship formed between selected neighboring routers for the purpose of
exchanging routing information. Not every pair of neighboring routers become adjacent.
Aggregation
The combining of the characteristics of several different routes in such a way that a single
route can be advertised. Aggregation reduces the amount of information that the routers
must store and exchange.
Area
A set of networks grouped together but located in the same autonomous system. Setting
up areas reduces OSPF routing traffic because each area's topology is invisible to the rest
of the autonomous system.
AS Path
Attribute composed of a sequence of autonomous system path segments. The paths can be
defined in ordered or unordered sets. The sets include the autonomous systems a route
has traversed. The sets are used in aggregation and reduce routing information by listing
each system only once regardless of how many times those systems are included in
different paths.
Authentication Key
Parameter that guarantees that routing information is only imported from trusted routers.
Many protocols, such as RIP version 2 and OSPF, provide mechanisms for authenticating
protocol exchanges. An authentication key permits generation and verification of the
authentication field in protocol packets.
CoreWatch User's Manual
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