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Deploying Microsoft Office Live Communications Server 2005 and the F5 BIG-IP LTM System v9
BIG-IP® Deployment Guide 2
Configuration example
The Live Communications Server 2005 Enterprise Edition introduces the
concept of a pool. Multiple Live Communications Servers communicate
with a single back-end SQL Server (or cluster of servers). Pool is used to
describe this collection of multiple Live Communications Servers tied to a
single back-end. Users are now homed to a pool as opposed to individual
Live Communications Servers. This allows users to login using any Live
Communications Server in a pool. Pools allow flexibility by increasing the
capacity of the service by adding more Live Communications Servers on the
fly. Failure of one or more Live Communications Servers will have a
minimal effect on service availability, as the load is balanced between the
remaining Live Communications Servers.
This configuration example shows a typical configuration with a BIG-IP
LTM system and Microsoft Live Communications Server. With multiple
Live Communications Servers in a Pool there is now a need for distributing
the incoming session requests among the Live Communications Servers.
Figure 1 shows how a BIG-IP device is located in front of a pool of Live
Communications Servers.
Tip
Although only one BIG-IP device is necessary for this configuration, we
strongly recommend a redundant BIG-IP device for the highest level of
availability.
Figure 1 BIG-IP Live Communications Server logical configuration