Taking MPLS to the Edge. Irit Gillath

Transcription

1 Taking MPLS to the Edge Irit Gillath

2 Agenda Market status MPLS, VPLS, HVPLS and other nasty words Case study: Silver server Recap

3 Moving Ethernet from the enterprise to the carrier Ethernet was used originally for enterprise network Console based operation Few expensive experts that ran a medium size network Simple connectivity schemes No congestion Multiply the enterprise environment by 100 or 1000 and you get a small carrier Do you need to multiply the amount of experts? Less people = less devices to operate = so I only operate the core and keep all the rest as dumb pipe? How do I enable new service one by one hop configuration? What about over subscription? Congestions? 10/6/2011 3

4 Need for New Transport Technologies To accommodate huge bandwidth demands, service providers are facing new challenges Network scale more and more devices and users are connected to the network (mobile, business, residential) Different type of services more than just connectivity. QoS needs to be committed on, measured and delivered, varying between the different applications and users Flexibility cope with the increasing rate of new services and applications. Reduce the time to market Network Convergence to cut down OPEX costs providers are trying to converge and unified networks while maintaining the service as is Service creation challenges - Multiple technologies, Multiple protection schemes, Different network functionalities (Core / Aggregation / Access)

5 Current Typical Network Core has been covered advanced solutions using IP/MPLS Demarcation in evolution Switches, media conversion, true demarcation No real solution for edge (access and aggregation) Access and aggregation are made out of redesigned enterprise equipment Typical Architecture Intelligence in Core - Every packet goes up to the core and back down again 5

6 What is MPLS, VPLS? MPLS stands for "Multi-Protocol Label Switching" packet-switching VPN technology MPLS is a technological infrastructure Virtual private LAN service (VPLS) is a way to provide Ethernet based multipoint to multipoint communication over IP/MPLS networks It allows geographically dispersed sites to share an Ethernet broadcast domain by connecting sites through pseudo-wires Basically it s like a very big virtual switch PE B VPLS, H-VPLS, MPLS-TP, MPLS L3VPN are different transports built LSP Full- Mesh on top of MPLS PE A PE C VPLS Service1 VPLS Service2 IP / MPLS Network PE D

7 Why do we need to add hierarchical? H-VPLS Spoke options VLAN, Stacked VLAN, MPLS LSP Eliminates need for full mesh to include s Reduces signaling overhead (fewer VC-LSPs) Simplifies discovery ( only aware of upstream PE) Scalable inter-metro VPLS 6-Oct-11

8 H-VPLS Transformation This PE PE PE PE VLANs, Stacked VLANs or VC Labels CE Routers Becomes this Spoke VCs PE PE PE PE Hub VCs 6-Oct-11

9 Advantages of extending MPLS/VPLS to the Edge Increase network scalability Implement a Multi-Service Network Reuse 1M labels across the network Encapsulate QinQ /.1Q services Per customer per service QoS enforcement (HQoS) Per customer per service monitoring Consolidate WBH, VPN s, VoIP & video services to run on the same infrastructure Lower OPEX and CAPEX Devices are designed and built for the solution Extended the L2VPN up to the core less resources Optimized Power consumption to the Byte Optimize and make full use of network resources 9

10 Real life experience Silver Server

11 Silver Server Austrian privately owned service provider Founded 1994 Most infrastructure was built in miles (200 km) fiber infrastructure in Vienna POPs in all major cities in Austria Residential Businesses 2 COs in Vienna 75 employees

12 Initial network Access aggregation / backhaul Connecting POPs to core of network Internet IP routers for DSLAMs located at DSL PoPs Simple ring topology Minimal Layer 2 carrier business services Based on VLANs MAC learning required on the entire access network domains

13 Challenges MAC address tables Available bandwidth Network diameter and complexity Separate Layer 2 domains & technologies Fault restoration and detection QoS requirements Network management

14 PROBLEM: More Re-design Considerations Capacity in access network expensive Policing of IP downstream traffic happens after passing the access network Many small (low-end) IP routers SOLUTION: Locate fewer but larger high-end IP access routers closer to IP-core to apply traffic policies Use MPLS Pseudowires for backhaul between Access-POP and core aggregators By use of MPLS instead of VLAN the MAC learning within the access is still limited to its domain MPLS remove scaling problems

15 M P L S - P s e u d o w i r e s I P o v e r P P P o E Re-designed network D SL C u st o me rs AN -A D SL C u st o me rs AN -B D SL -Acce ss N o d e (AN ) MPL S T e l co Syst e ms T M Pse u d o w i re Ag g re g a t i o n T e l co Syst e ms T M PPPo E BR AS / L AC C i sco ASR D SL C u st o me rs AN -C D SL C u st o me rs AN -D MPL S C O R E N e t w o rk C i sco D SL C u st o me rs AN -E D SL C u st o me rs AN -G Sa me MPL S I n f ra st ru ct u re D SL C u st o me rs AN -F Intenet IP b a n d w i d t h p o l i cy Q o S e n f o rce me n t I n t e rn e t vs Acce ss N e t w o rk D SL I P-Se rvi ce -N o d e f o r AN -A-G I n t e rn e t I P

16 Redesign - services considerations PROBLEM: MAC-Learning on all devices (not only PEs) Redundancy usually based on STP completely blocking traffic for certain traffic/vlans to avoid loops Slow convergence in large networks Only small network diameter supported SOLUTION: Use hierarchical VPLS MAC learning only at VPLS aggregators required Point 2 Point Services without MAC-Learning Redundancy based on routing/mpls-te Unlimited network diameter

17 Business services redesigned Customers AN-B Customers AN-C Customers AN-D Customers AN-E Customers AN-F Customers AN-A Access Node (AN) MPLS Telco Systems TM7224 or Cisco ME3750 MPLS CORE Network Cisco 6500 Customers AN-G Pseudowire Aggregation Telco Systems TM7224 Multipoint to Multipoint VPLS Service Backup Pseudowire Pseudowire Aggregation Node A Pseudowire Aggregation Node B Point to Point only Pseudowire Service

18 Why did Silver Server choose Telco Systems MPLS solution Small cost-efficent devices for small POPs Modular 1/10 GigE Interfaces on SFP/XFP C/DWDM Easy to offer Ethernet services Seamless support for L2 services over entire network Flexible QoS architecture UNI ingress Interoperability of different devices / vendors Cisco Metro 3750 Telco Systems T-Metro 7224 Cisco 6500

19 Conclusion Taking MPLS to the Edge - advantages Scalable Resiliency Manageable Multi protocol support (future proofing) Field deployment application examples true multi-service: Business solutions Mobile backhaul Residential backhaul We invite you to enjoy the full benefits of mature, futureproof and interoperable technology today with Telco s Systems seamless MPLS solution

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