Juniper Networks Field Guide and Reference

Remote Authentication Dial-In User Service. Authentication method for validating users who attempt to access the router using Telnet.

(Pronounced "red") Random Early Detection. Gradual drop profile for a given class that is used for congestion avoidance . RED tries to anticipate incipient congestion and reacts by dropping a small percentage of packets from the head of the queue to ensure that a queue never actually becomes congested .

Request for Comments. Internet standard specifications published by the Internet Engineering Task Force.

Radio frequency interference. Interference from high-frequency electromagnetic waves emanating from electronic devices.

Routing Information Protocol. Distance-vector interior gateway protocol that makes routing decisions based on hop count.

Situation in which BGP systems send an excessive number of update messages to advertise network reachability information.

IP address of the router from which a BGP, IGP, or OSPF packet originated.

In BGP, configuring a group of routers into a cluster and having one system act as a route reflector, redistributing routes from outside the cluster to all routers in the cluster. Routers in a cluster do not need to be fully meshed.

OSPF link-state advertisement flooded throughout a single area by all routers to describe the state and cost of the router's links to the area.

Architectural portion of the router that handles all routing protocol processes, as well as other software processes that control the router's interfaces, some of the chassis components , system management, and user access to the router.

Common database of routes learned from one or more routing protocols. All routes are maintained by the JUNOS routing protocol process.

JUNOS software routing protocol process (daemon). User-level background process responsible for starting, managing, and stopping the routing protocols on a Juniper Networks router.

Reverse- path multicasting. Routing algorithm used by DVMRP to forward multicast traffic.

Resource Reservation Protocol. Resource reservation setup protocol designed to interact with integrated services on the Internet.