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Glossary
Glossary-6 PortMaster Configuration Guide
CHAP
Challenge Handshake Authentication Protocol. A Point-to-Point Protocol (PPP)
authentication method for identifying a dial-in user. CHAP does not itself prevent
unauthorized access, it merely identifies the remote end. See also PAP.
CIDR
Classless interdomain routing. A technique supported by BGP-4 that eliminates the
necessity for network address classes by explicitly advertising the length (netmask)
associated with each prefix.
CIR
Committed information rate. The minimum bandwidth guaranteed to be available if
required on a virtual circuit. This value is also known as
guaranteed bandwidth
.
classless interdomain routing
See CIDR.
client/server environment
An environment where a computer system or process requests a service from another
computer system. For example, a workstation can request services from a file server
across a network.
cluster
A group of internal BGP peers that share a common set of route reflectors. See also
cluster ID; route reflection; route reflector
.
Compare confederation.
cluster ID
An identifier, in dotted decimal format, that uniquely identifies a BGP route reflection
cluster within an autonomous system. All route reflectors within the cluster must be
configured with the same cluster ID. Internal peers that are not reflectors within the
cluster must not be configured with a cluster ID. The cluster ID is typically set to the BGP
router ID of one of the route reflectors within the cluster
.
See also cluster; route
reflection; route reflector.
CMAS
Confederation member autonomous system. A subdivision of an autonomous system
that is recognized only by other peers within the confederation and not by peers external
to the confederation. Within the confederation, each BGP peer treats only the peers in its
own CMAS as internal peers. Peers in different CMASs are treated as external peers.