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2/6/2014

Link Optimization Solution Document Outstanding ValueBest-In-Class Performance5000+ Enterprise CustomersCurrent Network and Requirement AnalysisCurrent Network One ISP connectivity at a time with its public IP range for accessing Internet.User access the Internet via firewallChat Applications are latency sensitive Firewall in single external mode (one ISP at a time)

Lupin Requirements for Wan ResiliencyBuild Redundancy for the exiting Wan (internet link) infrastructureLoad balancing between two or more links if required in futureOutbound load balancing (all business traffic must go through all ISP links equally) Inbound loadbalancing (all incoming traffic must go through all ISP links equally)Automated failover for the traffic in case of a link failure Link health check status reporting Link utilization statisticsDNS feature for resolving the inbound host resolution request based on link status for inbound application access

Outstanding ValueBest-In-Class Performance5000+ Enterprise Customers2

DMZDC Mumbai

Link- 1

Server Farm

Database

WEB/App

Current Setup

IntranetPublic Switch

Link- 2

Link- 3 & 4Outstanding ValueBest-In-Class Performance5000+ Enterprise Customers3

DMZDC Mumbai

Internet -1/2

Server Farm

Database

WEB/AppProposed Solution Architecture for Link Optimization

ArrayLink controller 1600 In Cluster

Internet -3/4

Outstanding ValueBest-In-Class Performance5000+ Enterprise Customers41) Gateway defined on Array for both the ISP.

2) Firewall Gateway :- IP address of the Array appliance

3) All user traffic to be passed through all ISP links through Array

4) If any fails then it will automatically failover to another available link

5) For Incoming traffic Array Link Load Balancer appliance will act as a Authoritative DNS server to resolved actual A record depending on link availability.

RoutingOutstanding ValueBest-In-Class Performance5000+ Enterprise CustomersLink Load Balancer

Internal User

InternetISP 2ISP 1Session based load balancing Link Load Balancer performing session based load balancing Outbound LoadbalancingOutstanding ValueBest-In-Class Performance5000+ Enterprise CustomersLink Load Balancer

Internal User

InternetISP 2ISP 1Health down for ISP 1Link Load Balancer automates traffic redirection for a failed LinkOutstanding ValueBest-In-Class Performance5000+ Enterprise CustomersOverview Smart DNSDisaster RecoverySmart DNS aware server or link health (Application Availability) information across large geographic areas. If one link fails, SDNS will not dispatch new traffic to the failed link.

ServersDC

ServersDRInternet

User

Link 1Link 2Outstanding ValueBest-In-Class Performance5000+ Enterprise Customers8Web Serverwww.site.comLink Load Balancerwww.site.comLocal name server NS1 or NS2 Reply for www.site.comIP = a.a.a.a or/and b.b.b.b.bNetwork 2b.b.b.xNetwork 1a.a.a.x

Access to Internet DNS NS2 NS1

Redirected to LLB Smart DNS Smart DNS from Link Load Balancer host www.site.com:a.a.a.a for network 1b.b.b.b for network 2 Reply for www.site.comIP = a.a.a.a or/and b.b.b.b.bInbound Traffic Flow Details for Link Load Balancer Outstanding ValueBest-In-Class Performance5000+ Enterprise CustomersWeb Serverwww.site.comLink Load Balancerwww.site.comLocal name server NS1 or NS2 Reply for www.site.comIP = b.b.b.b.b ISP 2b.b.b.xISP 1a.a.a.x

Smart DNS from Link Load Balancer host www.site.com:a.a.a.a for network 1b.b.b.b for network 2 Health down for ISP 1ISP 2ISP 1NS1 on ISP 1 times out , DNS request sent to NS2 on ISP 2Reply for www.site.comIP = b.b.b.b.b not a.a.a.ac DNS resolution automates traffic redirection for a failed LinkOutstanding ValueBest-In-Class Performance5000+ Enterprise Customers