14-66
User
Guide

for

the

Cisco

Application

Networking

Manager

5.2
OL-26572-01
Chapter
14






Configuring

Traffic

Policies
Configuring
Rules

and

Actions

for

Policy

Maps
Insert-HTTP
Field
that

instructs

the

ACE

to

insert

an

HTTP

header

for

Layer

7

load

balancing

for

requests

that
match
this

policy

map.

This

option

allows

the

ACE

to

identify

a

client

whose

IP

address

has

been
translated
using

NAT

by

inserting

a

generic

header

and

string

value

in

the

client

HTTP

request.
Do
the

following:
a.
In
the

HTTP

Header

Name

field,

enter

the

name

of

the

generic

field

in

the

HTTP

header.

Valid
entries
ar

e

unquoted

t

ext

strings

with

no

spaces

and

a

ma

ximum

of


64

alphanumeric
characters.
b.
In
the
HTTP
Header

Value
field,
enter

the

value
to
be
inserted

into

the

HTTP

header.

Valid
entries
ar

e

unquoted

t

ext

strings

with

a

maximum

of

255

al

phanumeric

characters.

The

ACE
supports
regular

expressions

for

matching.

To

include

spaces,

enclose

the

entire

string

in
quotes.
All

headers

in

the

header

map

must


be

matched.

See

Ta

b

l

e


14-33

for

a

list

of

the
supported
characters

that

you

can

use

in

regular

expressions.
Reverse
S

ti

cky
Feature
that

applies

onl

y

t

o

the

ACE

module

version

3.

0(0)A2(1.1),

ACE

appliance

version
A4(1.0),
or

later

releases

of

either

device

type.

Reverse

IP

stickiness

is

an

enhancement

to

regular
stickiness
and

is

used

mainly

in

firewall

load

balancing

(FWLB).

It

ensures

that

multiple

distinct
connections
that

are

opened

by

hosts

at

both

ends

(client

and

server)

are

load-balanced

and

stuck
to
the

same

firewall.

Reverse

stickiness

applies

to

such

protocols

as

FTP,

RTSP,

SIP,

and

so

on
where
there

are

separate

control

channels

and

data

channels

opened

by

the

client

and

the

server,
respectively.
For

complete

details

about

reverse

stickiness,

see

the

Release

Note

for

the

Cisco
Application
Control

Engine

Module

(Software

Version

3.0(0)A2(X)) .
In
the

Sticky

Group

field,

choose

the

name

of

a

an

existing

IP

netmask

sticky

group

that

you

want
to
associate

with

reverse

IP

stickiness.
Server
Farm
Field
that

instructs

the

ACE

to

load

balance

client

requests

for

content

to

a

server

farm.
Do
the

following:
a.
In
th

e

Server

Farm

field,

ch

oose

the

server

farm

t

o

wh

ich

requests

for


content

ar

e

t

o

be

sent.
b.
In
the
Backup

Server

Farm

field,
choose
the

backup

server

farm

to

which

requests

for

content
are
to

be

sent.
Choose
N/A

to

indicate

that

no

backup

server

farm

is

to

be

used.
c.
Choose
the

Sticky

Enabled

check

box
to
indicate

that

the

sticky

group
associated

with

this
policy
and

applied

to

the

pr

imary

ser

ver

farm

is

applied

t

o

the

backup

ser

ver

farm.

Clear

t

he
Sticky
Enabled

check

box

to

indicate

that

the

sticky

group

associated

with

this

policy

and
applied
to

the

primary

server

farm

in

that

policy

is

not

applied

to

the

backup

server

farm.
d.
Choose
the
Aggregate

State

Enabled

check

box
to

indicate

that

the

operational

state

of

the
backup
server

farm

is

taken

into

consideration

when

evaluating

the

state

of

the

load-balancing
class
in

a

policy

map.

Clear

this

check

box

to

indicate

that

the

operational

state

of

the

backup
server
farm

is

not

taken

into

consideration

when

evaluating

the

state

of

the

load-balancing
class
in

a

po

licy

map.
Table
14-26
Layer
7

Server

Load

Balancing

Policy

Map

Actions

(continued)
Action
Description