
Glossary
Glossary-28 PortMa ster Configuration Guide
PRI
Primary Rate Interface. The ISDN interface to primary rate access. Primary rate  access 
consists of a single 64Kbps D channel plus 23 (T1) or 30 (E1) 64Kbps B channe ls for voice 
or data. Compare BRI. 
Primary Rate Interface 
See PRI.
propagation
The process of translating and forwarding routes from one routing protocol into another. 
Route propagation is also known as route redistribution. Lucent Remote Access 
recommends using route filters in propagation rules  to ensure that you redistribute 
information without creating routing loops. Compare summarization.
provisioning
The process of supplying telecommunications service and equipment to a user. In ISDN 
provisioning, for example, a telephone service provider configures its own  switch that 
connects via an ISDN line to the user's ISDN hardware. Because switch configuration 
varies according to hardware, telephone company, switch, and available ISDN line, user 
and provider must work together to establish the correct settings.erc
proxy Address Resolution Protocol 
See proxy ARP.
proxy ARP
Proxy Address Resolution Protocol. A variation of the ARP protocol in which a router o r 
other device sends an ARP response to the requesting host on behalf of another no de. 
Proxy ARP can reduce the use of bandwidth on slow-speed WAN links. See also ARP. 
PVC
Permanent virtual circuit. A circuit that defines a permanent connection in a switched 
digital service such as Frame Relay. Frame Relay is the only switched digital service that 
uses PVCs supported by PortMaster products. 
RRADIUS
Remote Authentication Dial-In User Service. A client/server security protocol created by 
Lucent.