Description

This article defines what a VIP is in MCP 1.0. other common names for VIP are: virtual ip address and reverse proxy

Content / Solution:

VIP (virtual ip address) is an IP address that is not connected to a specific server. Incoming packets are sent to the VIP address, but all packets reach real network interfaces. VIPs are mostly used for connection redundancy; a VIP address may still be available if a server fails because an alternative server replies to connection requests.  A load-balanced VIP is a VIP where traffic is distributed among a group of servers.  A VIP is also sometimes referred to as a reverse proxy (A reverse proxy dispatches in-bound network traffic to a set of servers, presenting a single interface to the caller).

In the Cloud, a VIP normally consists of a public ip address, protocol, port, and server farm.  You can configure your VIP to accept connections on the tcp or udp protocol and listen on ports 1-65535.  You can also place your vip 'In Service' to accept incoming connections, place it 'Out of Service' to deny incoming connections, and enable/disable ICMP reply when your VIP is active (has at least one active real server in the server farm). 

For more details on the elements involved in creating a VIP, see:

What is a Real Server or Rserver

What is a Probe

What is a Server Farm

Introduction to Persistence Profiles at an MCP 1.0 Data Center

For examples of specific uses of a VIP, see:

How to set up Load Balancing using the VIP function in a MCP 1.0 location

Redirecting a Port on a Public IP to a Different Port on an Internal Server in a MCP 1.0 Data Center