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Interference from high-frequency electromagnetic waves emanating from electronic devices.
Manages the radio part of the network in UMTS.
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 becomes full.
See policing.
See policing.
A next hop for a static route that allows all matching packets to be sent to the Routing Engine for processing.
An RSVP message object that notes the IP address of each router along the path of an LSP.
A method of consulting the routing table to locate the actual physical next hop for a route when the supplied next hop is not directly connected.
(Pronounced “are-bock”) Regional telephone companies formed as a result of the divestiture of the Bell System.
PIM message unicast by the first hop router to the RP that contains the multicast packets from the source encapsulated within its data field.
PIM message sent by the RP to the first hop router to halt the sending of encapsulated multicast packets.
A next hop for a configured route that drops all matching packets from the network and returns an ICMP message to the source IP address. Also used as an action in a routing policy or a firewall filter.
Authentication method for validating users who attempt to access the router using Telnet.
JUNOS software command that allows a user to change the name of a routing policy, a firewall filter, or any other variable character string defined in the router’s configuration.
Internet standard specifications published by the Internet Engineering Task Force.
For PIM-SM, a router acting as the root of the shared distribution tree.
RIP message used by a router to ask for all or part of the routing table from a neighbor.
A next hop for a static route that allows the router to perform a recursive lookup to locate the physical next hop for the route.
Resource reservation setup protocol designed to interact with integrated services on the Internet.
RIP message used to advertise routing information into a network.
JUNOS software data structure generated by the Internet Processor ASIC after performing a forwarding table lookup.
RSVP message that allows the egress router to receive an explicit confirmation message from a neighbor that its Resv message was received.
RSVP message that indicates an error has occurred along an established LSP. The message is advertised downstream toward the egress router and it doesn’t remove any RSVP soft state from the network.
RSVP message that indicates the established LSP and its associated soft state should be removed by the network. The message is advertised upstream toward the ingress router.
Method used in a multicast routing domain to prevent forwarding loops.
Routing algorithm used by DVMRP to forward multicast traffic.
JUNOS software syntax used in a routing policy to match an individual route or a group of routes.
Situation in which BGP systems send an excessive number of update messages to advertise and withdraw reachability of the same NLRI.
IP address of the router from which a BGP, IGP, or OSPF packet originated.
A method of placing learned routes from one protocol into another protocol operating on the same router. The JUNOS software accomplishes this with a routing policy.
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.
An IP address used by a router to uniquely identify itself to a routing protocol. This address may or may not be equal to a configured interface address.
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.
OSPF link-state advertisement sent by each router in the network. It describes the local router’s conected subnets as well as their metric values.
A numerical value assigned to an OSPF or an IS-IS interface that is used as the first criterion in electing the designated router or designated intermediate system, respectively.
See Autonomous System (AS).
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.
A logical data structure used by BGP to store routing information.
Distance-vector Interior Gateway Protocol that makes routing decisions based on hop count.
A collection of routing tables, interfaces, and routing protocol parameters. The set of interfaces belongs to the routing tables and the routing protocol parameters control the information in the routing tables.
JUNOS software routing protocol process (daemon). User- level background process responsible for starting, managing, and stopping the routing protocols on a Juniper Networks router.
Common database of routes learned from one or more routing protocols. All routes are maintained by the JUNOS routing protocol process.
RSVP message sent by the ingress router downstream toward the egress router. It begins the establishment of a soft state database for a particular label-switched path.
RSVP message sent by the egress router upstream toward the ingress router. It completes the establishment of the soft state database for a particular label-switched path.
A label-switched path that is dynamically established using RSVP Path and Resv messages.
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