8-5
User
Guide
for
the
Cisco
Application
Networking
Manager
5.2
OL-26572-01
Chapte
r
8
Configuring
Real
Servers
and
Server
Farms
Configuring
Real
Servers
To
use
DWS,
you
c
onfigure
t
he
ACE
t
o
connect
t
o
the
Data
Center
Int
erconnect
device
(Cisco
Nexus
7000
Ser
ies
switch)
and
the
VMware
Controller
associated
with
the
local
and
remote
VMs.
You
also
configure
the
ACE
with
the
probe
type
VM
to
monitor
a
server
farm’s
local
VM
CPU
and
memory
usage,
which
determines
when
the
ACE
bursts
traffic
to
the
remote
VMs
(see
the
“Configuring
Dynamic
Workload
Scaling”
section
on
pa
ge
8-26
).
For
more
details
on
this
feature,
see
the
Cisco
4700
Series
Application
Control
Engine
Appliance
Server
Load-Balancing
Configuration
Guide
.
Server
Farms
Typically,
in
data
centers,
servers
are
organized
into
related
groups
called
server
farms
.
Servers
within
server
farms
often
contain
identical
content
(referred
to
as
mirrored
content)
so
that
if
one
server
becomes
inoperative,
another
server
can
t
ake
i
ts
place
immediately.
Also,
having
mi
rrored
content
allows
several
servers
to
share
the
load
of
increased
demand
during
important
local
or
international
events,
such
as
the
Olympic
Games.
This
phenomenon
of
a
sudden
large
demand
for
content
is
called
a
flash
crowd
.
After
you
create
and
name
a
server
farm,
you
can
add
existing
real
servers
to
it
and
configure
other
server
farm
parameters,
such
as
the
load-balancing
predictor,
server
weight,
backup
server,
health
probe,
and
so
on.
For
a
listing
and
bri
ef
description
of
l
oad-balancing
predictors,
see
the
“Load-Balancing
Predictors”
section
on
page
8-2
.
Related
Topics
Configuring
Server
Farms,
page
8-30
Configuring
Real
Servers
Real
servers
are
dedicated
physical
servers
that
are
typically
configured
in
groups
called
server
farms.
These
servers
provide
services
to
clients,
such
as
HTTP
or
XML
content,
streaming
media
(video
or
audio),
TFTP
or
FTP
services,
and
so
on.
When
configuring
real
servers,
you
assign
names
to
them
and
specify
IP
addresses,
connection
limits,
and
weight
values.
The
ACE
uses
traffic
classification
maps
(class
maps)
within
policy
maps
to
filter
specified
traffic
and
to
apply
specific
actions
to
that
traffic
based
on
the
load-balancing
configuration.
A
load-balancing
predictor
algorithm
(such
as
round-robin
or
least
connections)
determines
the
servers
to
which
the
ACE
sends
connection
requests.
For
information
about
configuring
class
maps,
see
the
“Configuring
Virtual
Context
Class
Maps”
section
on
pa
ge
14-6
.
This
section
includes
the
following
topics:
•
Configuring
Load
Balancing
on
Re
al
Ser
vers,
page
8-6
•
Displaying
Real
Server
Statistics
and
Status
Information,
page
8-9
