Load Balancing - Dedicated vs Shared

Updated by Russ Malloy on Aug 6, 2013
  • Shared Load Balancers are now configurable in a self-service fashion.
  • Customers can log in directly to their Dedicated Load Balancers.
  • With the Shared Load Balancers the External IP sits directly on the Load Balancer.
  • With a Dedicated Load Balancer, the VIP is an internal IP. In order to provide external access, a MIP/NAT must be added to the firewall, which will point to the internal VIP.
  • If a customer wants to use a Load Balancer to access an internal VIP over their site to site VPN they must use a dedicated Load Balancer. It is not possible to access an internal VIP on the the Shared Load Balancer over a site to site VPN.
  • All shared Load Balancers are in a High Availability pair. If either node goes down there will be no downtime. Dedicated Load Balancers can be put in a HA pair by request.
  • MIP's are not accessible from within the datacenter. If you need to reach a public IP from both inside and outside the datacenter, you need to use the Shared Load Balancer.

Definitions in regards to this article:
VIP - Virtual IP
MIP - Mapped IP
NAT - Network Address Translation
VIP - The IP used for the Virtual Server. A VIP includes both an IP and a port. Separate VIP's are required for multiple ports used with the same IP.
Internal VIP - A VIP on a dedicated Load Balancer. This will always be an internal IP
External VIP - A VIP on a shared Load Balancer. This will always be an external IP and is accessible from outside of the datacenter or within
MIP/NAT - A one to one IP translation. In regards to this article, it is a Public IP that points to an Internal IP. Example: ->

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