Multi-Protocol Label Switching (MPLS) Conformance and ... - Ixia

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IS-ISAn OSI/IP routing protocol, IS-IS stands for Intermediate System to Intermediate System(i.e., router to router). MPLS traffic engineering parameters can be distributed with IS-ISusing extensions to the protocol (IS-IS-TE).L2 VPNAn emulation of a Layer 2 switching environment, supplied by a service provider for itscustomers, via a core network. In MPLS networks, L2 VPNs use LDP to signal connectionsfor transporting Layer 2 frames over MPLS.L3 VPNAn emulation of Layer 3 services/distribution of routes, supplied by a service providerfor its customers, via a core network. L3 VPNs use BGP extensions to signal providerprovisionedVPNs per IETF Draft RFC 2547bis.Label Distribution Protocol (LDP)A protocol, defined in RFC 3036, used to distribute MPLS label and stream mappinginformation.Label Edge Router (LER)A router at the edge of an MPLS network. At the ingress side, an LER maps IP packetsto LSPs, adds the appropriate MPLS header, and forwards the packet to the next hop. Atthe egress side, an LER strips the MPLS label(s) and forwards the packet using traditionalrouting mechanisms.Label Information Base (LIB)A table that specifies how to forward a packet in an MPLS router. This table associateseach label with its corresponding FEC.Label Switched Path (LSP)In MPLS, a path through a network from an ingress to an egress router that has beenestablished through the distribution of labels that define hop-by-hop forwarding treatment.Label Switching Router (LSR)A router, operating in the core of an MPLS network, that switches traffic based on labels.Martini DraftsA set of IETF draft specifications (named for primary author Luca Martini) that define themechanisms for creating Layer 2 MPLS VPNs. Such VPNs support Layer 2 traffic such asFrame Relay, ATM, and Ethernet tunnels over an MPLS network.Open Shortest Path First (OSPF)A link-state routing protocol used by IP routers located within a single AutonomousSystem (AS) to determine routing paths. MPLS traffic engineering parameters can bedistributed with OSPF using extensions to the protocol (OSPF-TE).30
P Router (Provider Router)A router that operates in the core of an service provider network.Provider Edge Router (PE)A router that operates at the edge of a service provider’s network, interfacing withthe corresponding Customer Edge (CE) router(s) at the edge of one or more customernetworks.Quality of Service (QoS)A measure of performance for a transmission system that reflects its transmission qualityand service availability. QoS mechanisms provide the ability to manage network traffic’sbandwidth, delay, and congestion.Resource Reservation Protocol — Tunneling Extensions (RSVP-TE)Extensions to the RSVP protocol related to traffic engineering. RSVP-TE implements anassignment of labels from ingress to egress routers, with consideration for bandwidth andother QoS requirements.Routing Information Protocol (RIP)An Internet routing protocol that uses hop count as a routing metric. RIP is the mostcommon IGP used in the Internet.Traffic EngineeringTechniques and processes that optimize the routing of network traffic. Traffic engineeringmechanisms enable network administrators to manage network traffic’s bandwidth, delay,and congestion.Virtual Circuit (VC)A circuit or path between points in a network that appears to be a discrete, physicalpath but is actually part of a managed pool of resources from which specific circuits areallocated as needed to meet traffic requirements.Virtual Private LAN Service (VPLS)A class of VPN that supports the connection of multiple sites in a single bridged domainover a managed IP/MPLS network. The goal of VPLS is to provide a protocol-transparent,any- to-any, full-mesh service across a WAN.Virtual Routing and Forwarding (VRF) TableA VPN routing/forwarding instance. A VRF includes the routing information that defines acustomer VPN site that is attached to a PE router.31
Page 6 and 7: Advantages of MPLSMPLS is atechnolo
Page 8 and 9: Signaling and label distributionCon
Page 10 and 11: MPLS VPNs vs. IPSec VPNs. The term
Page 12 and 13: There are two kinds of Layer 2 VPNs
Page 14 and 15: Traffic engineeringAnother key shor
Page 16 and 17: Why Test for MPLS Conformance?MPLS
Page 18 and 19: Optimized hardware platformWhile si
Page 20 and 21: Ixia has developed two primary appl
Page 22: Appendix: MPLS Testing ExamplesThis
Page 25 and 26: Figure 10. IxScriptMate L3 VPN RSVP
Page 27 and 28: IxScriptMate VPLS MAC Address Cache
Page 29: GlossaryBorder Gateway Protocol (BG

Multi-Protocol Label Switching (MPLS) Conformance and ... - Ixia

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