Network Infrastructure
Connectivity
Rackspace utilizes connections to multiple backbones to ensure that data reaches the end-user in the fastest,
most efficient manner possible. We also have peering agreements with local ISPs to allow fast delivery of packets when possible.
BGP4 Routing
Rackspace runs the Border Gateway Protocol (BGP4) for best case routing. Our entirely switched, Cisco powered network
employs Cisco GSR 12000 class routers running HSRP (N+1 hot failover) to ensure that data can be routed even in the
event of a router failure. The BGP4 protocol is a standard that allows for the routing of packets of information
sent out from the Rackspace Network. Each packet of information is evaluated and sent over the best route possible.
Because of our redundant network architecture, packets may be sent via alternative routes even if they are being
delivered to the same end user. Should one of our providers fail, packets leaving our network are automatically
redirected through another route via a different provider.
Guaranteed packet Delivery
Rackspace pays providers to make sure that packets of information are delivered to the end user's eyeballs.
This offers significant advantages over simply peering with the major backbones. Peering agreements rarely include
Service Level Agreements (SLAs) so no one is accountable for lost packets at congested exchange points.
Because Rackspace actually has SLAs with all our providers, they are able to guarantee that all packets will
leave our network at full speed.