8-45
User
Guide

for

the

Cisco

Application

Networking

Manager

5.2
OL-26572-01
Chapter
8






Configuring

Real

Servers

and

Server

Farms
Configuring
Server

Farms
Step
5
Click
Deploy
Now

to

deploy
this

configuration

on

t

he
ACE
and

save

your

entries

t

o

the
running-configuration
and

startup-configuration

files.
Related
Topics

•
Configuring
Health
Monitoring
for
Real

Servers,

page
8-51

•
Configuring
Real
Servers,
page
8-5

•
Configuring
Sticky

Groups,

page
9-7

•
Adding
Real

Servers

to

a

Server

Farm,

page
8-37

•
Configuring
Dynamic

Workload

Scaling,

page
8-26
Least
Lo

aded
(continued)
For
example,

to

configure
the
ACE
to

select

the

real

server

with

the
lowest

load

based

on

feedback

from
an
SNMP

pr

obe

called

PROBE_SNMP,

enter

the

following

commands:
host1/Admin(config)#
serverfarm

SF1
host1/Admin(config-sfarm-host)#
predictor

least-loaded

probe

PROBE_SNMP
host1/Admin(config-sfarm-host-predictor)#
To
reset

the

predictor

method

to

the

default

of

round-robin,

enter

the

following

command:
host1/Admin(config-sfarm-host)#
no

predictor
Response
Server
selection

method

based

on

the

lowest

response

time

for

a

requested

response-time

measurement.
a.
In
the
Response

Type
field,
select

the

type

of

measurement

to
use
as

follows:

–

App-Req-To-Resp—The

response

time

from

when

the

ACE

sends

an

HTTP

request

to

a

server
to
the

time

that

the

ACE

receives

a

response

from

the

server

for

that

request.

–

Syn-To-Close—The

response

time

from

when

the

ACE

sends

a

TCP

SYN

to

a

server

to

the
time
that

the

ACE

receives

a

CLOSE

from

the

server.

–

Syn-To-Synack—The

response

time

from

when

the

ACE

sends

a

TCP

SYN

to

a

server

to

the
time
that

the

ACE

receives

a

SYN-ACK

from

the

server.
b.
In
the
Response
Samples

field,
enter
the

number

of

samples

over
which
you

want
to

average

the
results
of

the

response-time

measurement.

Valid

entries

are

1,

2,

4,

8,

and

16

(values

from

1

to

16
that
are

also

a

power

of

2).
c.
In
th

e

Weight

Connection
field,
check
th

e

ch

eck

box


to

i

nstruct

th

e

ACE

to


use

t

he
current
connection
count

in

the

final

load

calculation

for

a

real

server.

When

you

configure

this

option,

the
ACE
includes

the

current

connection

count

in

the

total

load

calculation

for

each

real

server

in

a
server
farm.

Uncheck

the

check

box

to

reset

the

behavior

of

the

ACE

to

the

default

of

excluding

the
current
connection

count

from

the

load

calculation.
Round
Robin
Server
selection

method

in

which

The

ACE

selects

the

next

server

in

the

list

of

servers

based

on

server
weight.
This

method

is

the

default

predictor.
Table
8-9
Predictor
Method

Attributes

(continued)
Predictor
Method
Description
/

Action