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[object Object],[object Object],[object Object],[object Object]

Our Mission ,[object Object],TN250G – Core Service Switch

The Business Case for Layer 2 MPLS VPNs ,[object Object],[object Object],PROFIT$ FOLLOW THE MONEY CUT COSTS SQUEEZE VALUE OUT OF INVESTMENTS

Plan of the Presentation ,[object Object],[object Object],[object Object],[object Object]

The VPN Landscape ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

VPN overview virtual (vûrch-l) adj. Existing in the mind, especially as a product of the imagination ,[object Object],[object Object],[object Object],[object Object],[object Object],Sharing Cost

VPN: Overlay on shared infrastructure SERVICE PROVIDER NETWORK: SHARED INFRASTRUCTURE Customer 1 Site 1 Customer 1 Site 2 Customer 1 Site 3 Customer 2 Site 1 Customer 2 Site 2 Customer 2 Site 3 Customer 3 Site 1 Customer 3 Site 2 Customer 3 Site 3

IP VPNs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Layer 2 VPNs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Layer 3 VPNs ,[object Object],[object Object],[object Object],[object Object],[object Object]

MPLS VPNs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Layer 3 MPLS VPNs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Layer 2 MPLS VPNs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Case for MPLS L2VPNs ,[object Object],[object Object],[object Object],[object Object]

L2VPNs - The Way to Go! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FR/ATM Dominates ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],$ $

Ethernet - Looming in the Horizon ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

IP Services - A Money Pit ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why? ,[object Object],[object Object],[object Object],[object Object]

Who? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Technology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Architecture: Terminology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

L2VPN Reference Model SERVICE PROVIDER NETWORK PE PE PE PE PE PE P SITE 1 SITE 2 SITE 3 CE 1 CE 2 CE 3 Pseudowire1-3 Attachment circuits Attachment circuits Attachment circuits Pseudowire1-2 Pseudowire2-3

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],L2VPN Architecture: Functions

Configuration: Martini Approach interface sonet 3/1 encap frame-relay frame-relay interface dlci 43 mpls l2transport route 16.22.22.222 100 43 mtu 1500 ... DLCI VC ID PE2 IP address DLCI 43 SERVICE PROVIDER NETWORK CE 1 PE 1 16.22.22.221 PE 2 16.22.22.222 CE 2 DLCI 44 interface sonet 5/2 encap frame-relay frame-relay interface dlci 44 mpls l2transport route 16.22.22.221 100 44 mtu 1500 ... PE1 IP address VC ID DLCI

Configuration: Kompella Approach ,[object Object],[object Object],[object Object],CE2 50 CE3 51 CE4 52 CE5 53 PE 1 CE 1 DLCIs CE1 60 CE3 61 CE4 62 CE5 63 PE 2 CE 2 DLCIs CE1 70 CE2 71 CE3 72 CE4 73 PE 3 CE 3 DLCIs CE1 80 CE2 81 CE3 82 CE5 83 PE 4 CE 4 DLCIs CE1 90 CE2 91 CE3 92 CE4 93 PE 5 CE 5 DLCIs Pre-provisioned DLCIs

Signaling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],VC LABEL VC LABEL SERVICE PROVIDER NETWORK CE 1 PE 1 16.22.22.221 PE 2 16.22.22.222 CE 2 DLCI 43 DLCI 44 93 85

Martini Signaling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Martini Virtual Circuit FEC VC Info Len VC TLV C VC Type Group ID VC ID Interface parameters ... ... SERVICE PROVIDER NETWORK CE 1 PE 1 16.22.22.221 PE 2 16.22.22.222 CE 2 Targeted LDP Session between PEs

Kompella Signaling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],BGP L2VPN NLRI Length (2) Route Distinguisher (8) CE ID (2) Label-block Offset (2) Label Base (3) Variable TLVs (0..N) Ext. Community Type (2) Encaps Type (1) Cntrl Flags (1) Layer-2 MTU (2) Reserved (2) L2Info Ext Community draft-kompella-ppvpn-l2vpn-02.txt (Nov 2001) CE 4 PE 4 16.22.22.224 SERVICE PROVIDER NETWORK CE 1 PE 1 16.22.22.221 PE 2 16.22.22.222 CE 2 PE 3 16.22.22.223 CE 3 IBGP MESH

Forwarding ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],CE PE Receive Layer 2 PDU on attachment circuit 1 Switch received PDU to proper pseudowire 2 Generate pseudowire encapsulation attach labels, and transmit on pseudowire 3 Receive encapsulated PDU from pseudowire 4 Switch encapsulated PDU received from pseudowire to proper attachment circuit 5 Regenerate appropriate Layer 2 encapsulation and transmit on attachment circuit 6

Encapsulation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Martini Encapsulation ,[object Object],[object Object],[object Object],[object Object],[object Object],VC LABEL CONTROL WORD L2 PAYLOAD + PADDING Martini Encapsulation for MPLS Generic Control Word Format Frame Relay Flags ATM AAL5 Payload Service Flags FLAGS (10) LEN(6) SEQ NUMBER (16) RESV(4) B RESV(2) D C F RESV(4) F RESV(2) C I E

Encapsulation Example PE 2 pseudowire DA SA 8847h Tunnel Label VC Label Control Word FR PAYLOAD RES F B D C RES LENGTH SEQUENCE NUMBER Martini Encapsulation FLAG FR HEADER FR PAYLOAD FCS DLCI C/R EA DLCI F B D EA PE 1 CE 1 DLCI

Martini Encapsulation Drafts draft-martini-l2circuit-encap-mpls-04.txt (November 2001) FR : draft-martini-frame-encap-mpls-01.txt FR ATM : draft-martini-atm-encap-mpls-01.txt ATM Ethernet : draft-martini-ethernet-encap-mpls-01.txt Ethernet PPP/HDLC : draft-martini-ppp-hdlc-encap-mpls-01.txt PPP/HDLC

Alternative Encapsulations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Fischer Vs Brayley ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Transport ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MPLS Transport ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Layer 2 VPN Services ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Virtual Private Wire Service ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],SERVICE PROVIDER NETWORK CE 1 PE 1 16.22.22.221 PE 2 16.22.22.222 CE 2 DLCI 43 DLCI 44

Ethernet-based VPN Services “Never bet against Ethernet” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],CE CE CE CE CE PE PE PE Ethernet Connected CE PE-IWF Frame Relay / ATM Network L2PE L2PE L2PE Frame ATM

Virtual Private LAN Service ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],CE CE CE CE CE PE PE PE L2PE Ethernet Connected L2PE L2PE

IP over LAN Service ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],IP CE IP CE IP CE IP CE IP CE PE PE PE Ethernet Connected Ethernet Switch Ethernet Rptr

Conclusion ,[object Object],[object Object],[object Object]

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