Juniper Networks Field Guide and Reference

A collection of files that make up a JUNOS software component.

The architectural portion of the router that processes packets by forwarding them between input and output interfaces.

Information about a BGP route, such as the route origin, AS path, and next -hop router.

Peripheral Component Interconnect. Standard, high-speed bus for connecting computer peripherals. Used on the Routing Engine.

Personal Computer Memory Card International Association. Industry group that promotes standards for credit card-size memory or I/O devices.

Protocol data unit. IS-IS packets.

Provider edge router. A router in the service provider's network that is connected to a customer edge (CE) device and that participates in a Virtual Private Network (VPN).

Policing Equivalence Classes. In traffic policing, a set of packets that is treated the same by the packet classifier.

An immediately adjacent router with which a protocol relationship has been established. Also called a neighbor.

Physical Interface Card. A network interface “specific card that can be installed on an FPC in the router.

Protocol Independent Multicast. A protocol-independent multicast routing protocol. PIM sparse mode routes to multicast groups that might span wide-area and interdomain internets . PIM dense mode is a flood-and-prune protocol.

Packet loss priority.

Applying rate limits on bandwidth and burst size for traffic on a particular interface.

Removal of the last label, by a router, from a packet as it exits an MPLS domain.

Point-to-Point Protocol. Link-layer protocol that provides multiprotocol encapsulation. It is used for link-layer and network-layer configuration.

Desirability of a route to become the active route. A route with a lower preference value is more likely to become the active route. The preference is an arbitrary value in the range 0 through 255 that the routing protocol process uses to rank routes received from different protocols, interfaces, or remote systems.

On an interface, the default local address used for packets sourced by the local router to destinations on the subnet.

On an interface, the address used by default as the local address for broadcast and multicast packets sourced locally and sent out the interface.

Router interface that packets go out from when no interface name is specified and when the destination address does not imply a particular outgoing interface.

Router in the service provider's network that does not attach to a customer edge (CE) device.

Partial sequence number PDU. Packet that contains only a partial list of the LSPs in the IS-IS link-state database.

Addition of a label or stack of labels, by a router, to a packet as it enters an MPLS domain.