AWS Hybrid Cloud Connectivity
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AWS Hybrid Cloud Connectivity
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AWS Networking & Hybrid Cloud Connectivity
AWS Networking & Hybrid Cloud Connectivity 1.The concepts and building blocks 2.Connectivity options 3.Routing and AWS. Why and how BGP is used 4.Redundancy & real life examples
AWS Networking & Hybrid Cloud Connectivity 1.The concepts and building blocks 2.Connectivity options 3.Routing and AWS. Why and how BGP is used 4.Redundancy & real life examples
Public Cloud Solutions RDS DB RDS DB • Typical Internet facing web app S3 S3 EC2 EC2 • Internet – well connected, high EL B EL B speed AZ1 AZ2 • Low establishment cost Cloud Front CDN • Network performance non guaranteed Route53 DNS • Public Internet Internet • Globally scalable via Cloud Front Internet Router performing NAT 192.168.1.0/24 office/home network
Virtual Private Cloud (VPC) Solutions IGW VPC CIDR 10.1.0.0/16 • Your own private, isolated section of the AWS cloud • Corporate DC extension into AWS • Grouping of EC2 instances and other services within a private IP address range i.e. 10.1.0.0/16 • Subnets are local per AZ (layer 3 DCDC design) • Failover is via SLB or DNS – no VMotion like failover • Complete control over networking & security Instance B 10.1.2.22 /24 Instance A 10.1.1.11 /24 Public Subnet Public Subnet 10.1.1.0/16 10.1.2.0/16 10.1.3.0/16 Instance D 10.1.4.44 /24 Instance C 10.1.3.33 /24 Private Subnet Private Subnet Availability Zone A Availability Zone B VGW Direct Connect Hardware VPN (IPSec Internet) Corpora te Office Corpora te Office
VPC Components IGW VPC CIDR 10.1.0.0/16 • IGW Internet Gateway • VGW Virtual Private Gateway Instance B 10.1.2.22 /24 Instance A 10.1.1.11 /24 • CGW – Customer Gateway Public Subnet Public Subnet • Subnets 10.1.1.0/16 10.1.2.0/16 10.1.3.0/16 Instance D 10.1.4.44 /24 Instance C 10.1.3.33 /24 • Route tables Private Subnet • Direct Connect Private Subnet Availability Zone A Availability Zone B • Hardware VPN • Security Groups & ACLs CGW CGW VGW Direct Connect Hardware VPN (IPSec Internet) Corpora te Office Corpora te Office
AWS Networking & Hybrid Cloud Connectivity 1.The concepts and building blocks 2.Connectivity options 3.Routing and AWS. Why and how BGP is used 4.Redundancy & real life examples
Hardware VPN – IPSec via Internet • Provides an extension of the onsite corporate network • Can use your existing private IP addressing 10.x etc • IPSec tunnel to secure traffic over the Internet (128bit AES) • Static or dynamic routing (BGP) • 2 x termination points per region. Default is a tunnel to each
Hardware VPN – IPSec via Internet Internet links xDSL, EoC, Fibre Console builds config 2 x tunnels to each edge site (for VPG redundancy) CGW’s Cisco, Juniper or Windows Server
AWS Direct Connect Features • High speed, dedicated, private pipe into AWS (VPC) • Consistent network performance compared to Internet • Metered outbound traffic (~1/3 cost of Internet) • 1 or more network connection points per region (Syd x 2) • Supports redundancy (BGP routing) • Allows QoS • End to end support by single network provider
AWS Direct Connect Benefits • Reduced network transfer costs (out of AWS) • Improved & consistent application performance • Flexible – initial seed data typically very large • Less downtime end to end support • Security and compliance • Enabler for the Hybrid Cloud Architecture
AWS Direct Connect Anatomy Co-location rack within same DC ie Equinix Sydney AWS Direct Connect POP Customer Datacenter Private Virtual Interface dot1q VLAN 666 Colocation Facility - e.g. Equinix SV1 Customer DC Instance A 10.1.1.11 /24 Instance B 10.1.2.22 /24 Customer Subnet Public Subnet Public Subnet 10.1.1.0/16 192.168.0.0/16 AS65442 10.1.2.0/16 .18 10.1.3.0/16 .17 Instance D 10.1.4.44 /24 Instance C 10.1.3.33 /24 Private Subnet Private Subnet AWS Direct Connect Point of Presence Availability Zone A Availability Zone B Customer Gateway VPC CIDR 10.1.0.0/16 AS7224 Service Provider (MPLS L3 IP VPN or VPLS) VGW Cross Connect Customer or partner device CGW 169.254.247.16/30 BGP over /30 routed subnet VLAN on dot1q trunk BGP via managed Service Provider Network
AWS Networking & Hybrid Cloud Connectivity 1.The concepts and building blocks 2.Connectivity options 3.Routing and AWS. Why and how BGP is used 4.Redundancy & real life examples
BGP • Border Gateway Protocol • Needed to implement network redundancy • Standards based protocol used to connect the global Internet • Exchanges routes ‘prefixes’ between ‘neighbours’ • Uses AS numbers ie AS 65001 AS_PATH measure of network distance • Local Preference – means to override AS_PATH locally • Used by AWS to connect to customers and advertise routes. –Direct Connect (mandatory) –IPSec VPN (optional) • BiDirectional Forwarding Detection (BFD) – speeds up failover to as low a 150ms. Standard BGP can be 180 sec.
AWS Networking & Hybrid Cloud Connectivity 1.The concepts and building blocks 2.Connectivity options 3.Routing and AWS. Why and how BGP is used 4.Redundancy & real life examples
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