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

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Figure 14. IxScriptMate test resultsIxExplorer RSVP-TE Fast Reroute TestObjective: To measure the LSP switchover time of a router running RSVP-TE Fast Reroutebetween a primary LSP and a detour LSP upon link failure.Test setup: Three Ixia test ports connected to the DUT — one acting as the ingress and twoas egress (primary and detour). See Figure 15.Methodology:1. Two bidirectional LSPs are signaled using RSVP-TE through the DUT from the Ixiaingress and egress ports.2. RSVP-TE Fast Reroute objects are signaled to establish one LSP as a primary and thesecond LSP as a detour.3. Unicast traffic is sent from the ingress port over the primary LSP.4. A switchover to the detour LSP is initiated by bringing down the link to the DUT on theprimary LSP.5. Traffic is captured on both the egress ports. The switchover time is calculated bycomparing the timestamp of the last packet received on the primary port with thetimestamp of the first packet received on the detour port.Results: Fast Reroute switchover time of the DUT.Figure 15. IxScriptMate run setup28
GlossaryBorder Gateway Protocol (BGP)An exterior gateway protocol defined in RFC 1267 and RFC 1268. BGP is the principalprotocol used along the Internet backbone and within larger organizations.Constraint-Based RoutingRouting that uses intelligent path computation and explicit route specification to determineroutes. This differs from typical non- Constraint-Based Routing, in which routes arecalculated based only on shortest path. Constraint-Based Routing enables trafficengineering in MPLS networks.Class of Service (CoS)Class of Service (CoS) is a method for managing network traffic by grouping similartypes of traffic (for example, e-mail, streaming video, voice, large document file transfer)together and treating each type as a class with its own level of service priority.Customer Edge Router (CE)A router at the edge of a customer network, the CE interfaces to a corresponding ProviderEdge (PE) router at the edge of the service provider’s network.Diffserv (Differentiated Services)An architecture for providing different types or levels of service for network traffic.Exterior Gateway Protocol (EGP)A protocol that distributes routing information to the routers that connect networks.Fast RerouteA mechanism used in MPLS networks to provide redundant data paths for recovery fromnode or link failures. The RSVP-TE protocol is used to signal Fast Reroute configuration.Forward Equivalency Class (FEC)A classification of a group of packets — all packets assigned to a FEC receive the samerouting treatment. FECs can be based on IP address prefixes or service requirements for atype of packet (QoS, VPN, Traffic Engineering, etc.).Forwarding Information Base (FIB)A table containing the information necessary to forward IP data in a router. At a minimum,the FIB contains the outbound interface identifier and next hop information for eachreachable IP destination network.Internet Gateway Protocol (IGP)Protocol that distributes routing information to the routers within a network. The term“gateway” is historical; “router” is currently the preferred term. Example IGPs are OSPF,IS-IS and RIP.29
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: IxScriptMate VPLS MAC Address Cache
Page 31 and 32: P Router (Provider Router)A router

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

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