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1、1 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101MPLS 高级话题和未来发展高级话题和未来发展MA Shaowen2 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101议程议程 IETF Update Traffic Engineering Fast Reroute Quality of Service Layer 2 VPNs3 2005 Cisco Systems, Inc. All rights re
2、served.Cisco ConfidentialRST-4101IETF UPDATE4 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101Internet Engineering Task Force Originated MPLS standardization Base MPLS technology specifications completed Six active working groupsMPLSPseudowire Edge-to-Edge (PWE3) Layer 2 Virtu
3、al Private Networks (L2VPN) Layer 3 Virtual Private Networks (L3VPN)Common Control and Measurement Plane (ccamp)Path Computation Element (PCE)new in 2005 5 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101MPLS RFCs in 2004 RFC3946GMPLS Extensions for SONET and SDH (PS) RFC3945G
4、MPLS Architecture (PS) RFC3919Remote Network Monitoring (RMON) Protocol Identifiers for IPv6 and Multi-Protocol Label Switching (I) RFC3815Definitions of Managed Objects for LDP (PS) RFC3814MPLS Forwarding Equivalence Class to Next Hop Label Forwarding Entry MIB (PS) RFC3813MPLS Label Switching Rout
5、er MIB (PS) RFC3812MPLS Traffic Engineering (TE) MIB (PS) RFC3811Definitions of Textual Conventions for MPLS Management (PS) RFC3785Use of Interior Gateway Protocol (IGP) Metric as a Second MPLS Traffic Engineering (TE) Metric (BCP)6 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST
6、-4101MPLS 工作组工作组 31 RFCs published to date, several more in final stagesIncludes link bundling, FRR Current major work areas:OAM (Operations and Management)Traffic engineering extensions (e.g. point-to-multipoint)LDP extensions for point-to-multipointAdvancing base specs from “Proposed“ to “Draft St
7、andard“7 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101MPLS OAM 草案草案 MPLS OAM requirements LSP ping and traceroute LSR self test OAM frameworkintended to span VPNs and PWE3 as well as core MPLS8 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101流量工程扩展流量工
8、程扩展 MPLS fast reroute RFC just published Inter-area TE, inter-AS TE (mostly in CCAMP) Soft preemption Point-to-multipoint TE9 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101PWE3 工作组工作组 Original charter is near completion ATM, Ethernet, Frame Relay, PPP/HDLC, and SONET encaps
9、largely done LDP extensions for signaling on way to RFC Virtual circuit connection verification (VCCV) simply allows use of all MPLS OAM tools over a pseudowire New hot topic: inter-AS PWs10 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101L2VPN 工作组工作组 Standardizing:Virtual Pri
10、vate LAN Service (VPLS): L2 service that emulates a LAN, allowing standard Ethernet devices to communicate as if connected to a common LAN segmentVirtual Private Wire Service (VPWS): L2 service that provides L2 point-to-point connectivity across an IP/MPLS networkIP-only L2VPNs (IPLS): L2 service al
11、lowing standard IP devices to communicate with each other as if connected to a common LAN segment Two specs for VPLS (LDP-signaled, BGP-signaled) are on way to RFCs WG still working on drafts for:BGP-based auto-discoveryIPLS11 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101L3
12、VPN 工作组工作组 Responsible for defining and specifying solutions for supporting Layer 3 provider-provisioned virtual private networks Standardizing:“RFC 2547” BGP/MPLS IP VPNsIPv6 VPNs (based on 2547)IP VPNs using virtual routers Layer 3 VPN framework draft, requirements draft, and “RFC2547bis“ are publ
13、ished RFCs or in RFC queue Multicast in 2547 VPNs a main work item12 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101Path Computation Element (PCE) 工作组工作组 New WG chartered in 2005http:/www.ietf.org/html.charters/pce-charter.html Responsible for overall PCE architecture, discov
14、ery, and signaling, targeted at MPLS and GMPLS PCE Architecture ID published Drafts in preparation:Generic PCE Communication protocol requirementsPCE discovery protocol requirementsProtocol spec drafts 13 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101IETF 工作汇总工作汇总 Base MPLS
15、specifications are complete Current main focus areas:Layer 2 VPNsLayer 3 VPN multicastTE extensions: inter-AS, p2mpPath Computation ElementOAM14 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101TRAFFIC ENGINEERING15 2005 Cisco Systems, Inc. All rights reserved.Cisco Confidentia
16、lRST-4101流量工程流量工程 Inter-AS and Inter-Area TE Point-to-Multipoint TE Offline and Online Path Calculation Auto-Mesh16 2005 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialRST-4101Inter-AS/Inter-Area TE关键问题关键问题 TE depends on running CSPF at tunnel headend This works fine if tunnel headend has complete picture of the network topology If tunnel head and tail are not in the same are
