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Deploying Equalizer with MS Terminal Services

Deployment Guide

Configuration Example 2:

MSTS/Equalizer Deployment with IP Redirect Session Services

Overview

The obvious pitfall of the previous example configuration is that the power of

Equalizer's load balancing algorithms (a key advantage over using MS load

balancing solutions like NLB or Session Broker load balancing) gets applied to a

particular client at a specified interval set by the MSTS session timer and cluster

sticky timer, and not on each new login.

This disadvantage is overcome by employing MSTS Session Broker (on MSTS 2008;

Session Directory on MSTS 2003) to manage sessions across the server farm.

Equalizer and MSTS session services cooperate to allow an existing server

session to continue on client reconnect, even if Equalizer initially load balances

the client connection to another server.

In contrast to the previous configuration, this configuration requires:

• An Equalizer cluster sticky time of 0.

• If running on MSTS 2008, each MSTS server has Session Broker Load

Balancing disabled.

• On both MSTS 2003 and 2008, each MSTS server must have IP redirection

enabled.

• For session redirection to work, clients must appear to Equalizer and the

servers behind it to be on the same subnet as Equalizer's internal

interface (in single network mode) or external interface (in dual network

mode).

MSTS servers must be able to connect directly to clients on the internal

or external interface subnet, depending on the network mode. This may

require NAT on firewalls between clients and Equalizer, a VPN, or special

routing, depending on your network configuration.

• The spoof option must be disabled on the cluster.

Deployment Steps

The steps required to set up the example configuration involve defining the

Equalizer cluster and the associated parameters, and defining the servers and

server settings:

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Coyote Point Systems Equalizer Spezifikationen Seite 12