Presented by :- Stuart Tilley - Network & Systems Technician Conference – Network overview and proposed enhancement th March 2008

Overview Introduction Current Network Overview Proposed Technology Refresh –Core Network –Access Network –Access bandwidth –URL filtering –Edge CPE Summary

Introduction Current Network Implemented in April 2002 Designed and Built by Synetrix a key LGfL service provider Emerging Technology (MPLS) and vendor choice has provided a platform for; –Delivery of High availability and scalable Broadband services –Secure and safe educational environment –New service development and delivery –Shared community network (LPSN) Network Refresh - keeping pace with technology to and beyond 2012

The London Network – Physical Topology

The London Network Physical Network Topology 3 Core locations and 21 Aggregation Points serving 33 London Authorities Resilient dark fibre connecting core locations (10Gb/sec – OC192 SDH) AP’s connected to core by resilient nodal loops currently 1Gb or 100Mb capacity Resilient Service Hosting – SLB Resilient Tier 1 ISP’s (Thus, Abovenet, UKERNA, BBC) –Total Internet Capacity 6Gbps All Broadband services delivered over fibre (scalable bandwidth)

The London Network – Logical

The London Network Logical Network MPLS core network Dedicated RFC2547bis Layer3 VPN’s –Provides fully routed Virtual WANs per ‘customer’ (LEA or LA) –Totally autonomous routing policy and access control per Virtual WAN – WMSv1 & v2 –Virtual WANs distributed across complete physical network QoS Support

Network Statistics Total of edge bandwidth purchased 23Gbps Total traffic transiting network 3Gbps (average) Total capacity of Juniper access layer 228Gbps Total Capacity of Juniper core 480Gbps Total Internet Bandwidth - (Sept 2002) 30Mbps today averaging over 2Gbps HTTP traffic via URL service 1.5GMbps Requests served from Cache 400Mbps

Proposed Core Technology upgrade Upgrade existing Juniper M160 with Next Generation MX960 Fully resilient chassis (redundant HW) such as; –Power Supplies –Cooling fans –Routing Engines (RE) –Switch Control Board Fully resilient design/configuration –Dual Dense Port Concentrators (DPC’s) 10G + 1G –Support resilient backbone and core switching JUNOS code – leading standards development Low risk migration

Proposed Core Technology Upgrade Proposed MX960 core build

Proposed Access Technology Upgrade Replace Existing M10 with Juniper M10i Fully resilient chassis (redundant HW) such as; –Power Supplies –Cooling fans –Routing Engine (RE) –Forwarding Engine Board (FEB) Fully resilient Design/Configuration – 2 x 1Gbps Nodal loop Interfaces – 2 x 1Gbps Virtual switch uplinks (initial deployment)

Proposed Access Technology Upgrade Replace Existing Extreme S48i aggregation switch with Juniper EX4200. Redundant Power supply Virtual Chassis Configuration (max 10) 48 port 10/100/1000 capability Architecture design based high end core routing products –Packet Forwarding Engine –Routing Engine

Proposed Access Technology Upgrade Fully resilient design\configuration –Virtual chassis deployment –Multiple 1Gbps uplinks (resilience)

Access Bandwidth Upgrade All current 100Mbps nodal loops upgraded to 1Gbps –Merton – Croydon –Merton – Earls Court –Bromley - Croydon –Bromley – Welling –Lewisham - Welling –Welling – Bexleyheath –Romford – Bexleyheath –Romford – Telehouse –Waltham Forest – Camden –Haringey – Camden –Haringey – Barnet –Hayes - Harrow Prevent degradation of service in the event of primary loop failure Enhanced Traffic Engineering capability

Access Bandwidth Upgrade

URL Filtering Platform Enhancements Evaluation exercise underway “Squid MkII” vs Bluecoat Scaled to 2.5Gbps (N+1 resilience total 5Gbps) Additional Active/passive F5’s deployed to scale beyond 2.5Gbps Current total filtered traffic 1.5Gbps Expect 500Mbps year on year increase

URL Filtering Platform Enhancements

Replacement CPE Extreme 24e3/S200 replaced with Juniper J2320 Features –Forwarding performance IMIX 400Mbps –3DES performance 170Mbps –4 onboard 10/100 ports –3 Physical Interface Card (PIM) slots ES code –Combines session state information/next hop forwarding MPLS support fast reroute (resilient fibre services)

Summary High availability, scalable future proof infrastructure Low risk implementation/migration Continued delivery of existing Network Centric services such as; –Securestore –Desktop Content Control (DCC) –Campus Monitoring Protection (CMP) –High Definition Video Conferencing (HDVC) –Secure Remote Access (SRA) –Broadband Resilience Service (BRS) Enhanced distributed functionality – enabling new service developments such as: –Virtual Private LAN Services (VPLS) –Broadcast video –High capacity Resilient Broadband Services –Security Services