13-12
User
Guide

for

the

Cisco

Application

Networking

Manager

5.2
OL-26572-01
Chapter
13






Configuring

High

Availability
Understanding
ACE

Redundancy
ACE
Redundancy

Configuration

Requirements

and

Restrictions
Follow
these

requirements

and

restrictions

when

configuring

the

ACE

redundancy

feature.

•
In
bridged

mode

(Layer

2),

t

wo

contexts

cannot

share

t

he
same
VLAN.

•
To
achieve

active-active

redundancy,
a
minimum
of

t

wo
contexts
and
two
fault-tolerant

groups

are
required
on

each

ACE.

•
When
you

configure

redundancy,

the

ACE

keeps

all

interfaces

that

do

not
have
an

IP

address

in
the
Down
state.

The

IP

address

and

the

peer

IP

address

that

you

assign

to

a

VLAN

interface

should

be
in
the

same

subnet,

but

different

IP

addresses.

For

more

information

about

configuring

VLAN
interfaces,
see

the

“Configuring

Virtual

Context

VLAN

Interfaces”

section

on

page

12-6 .

•
When
importing
an

ACE

HA

pair

into

ANM,

follow

one
of
the

configuration
requirements
outlined
below
for

ANM

to

uniquely

identify

the

ACE

HA

pair:

–

Use

a

unique

combination

of

FT

interface

VLAN

and

FT

IP

address/peer

IP

address

for

every
ACE
HA

pair

imported

into

ANM.

For

HA,

it

is

critical

that

the

combination

of

FT

interface
VLAN
and

IP

address/peer

IP

address

always

be

unique

across

every

pair

of

ACE

peer

devices.

–

Define

a

peer

IP

address

in

the

management

interface,

using

the

management

IP

address

of

the
peer
ACE

(module

or


appliance).

Note

that

t

he

management

IP

ad

dress

and

management

peer
IP
address

used

for

this

definition

should

be

the

management

IP

address

used

to

import

both
ACE
devices

into

ANM.
For
more

information

about

the

use

of

multiple

HA

pairs

imported

into

ANM,

see

the

“ANM
Requirements
for

ACE

High

Availability”

section

on

page

5-8
For
additional

information

about

ACE

redundancy,

see

either

the

Cisco

Application

Control

Engine
Module
Administration

Guide

or

t

he

Cisco

4700

Series

Application

Control

Engine

Appliance
Administration
Guide.
Related
Topics

•
Understanding
ANM

High

Availability,
page
13-2
ACE
High

Availability

Troubleshooting

Guidelines
This
section

provides

the

following

set

of

guidelines

for

troubleshooting

an

ACE

high

availability

(or
redundancy)
configuration

i

n

ANM:

•
If
the
high

availability
setup
of

two

ACE

devices

is

successful,

the

HA

State

field
of
the

ACE

HA
Management
table

should

indicate

no

errors.

If

the

HA

State

field

does

not

read

Compatible,

verify
that
both

ACE

devices

are

the

same

type

of

hardware.

ACE

modules

cannot

be

synchronized

with
ACE
appliances.

•
If
the
high

availability

setup

of

two

ACE

devices

is

successful,

the

License

Compatibility
and
SRG
Compatibility
fields

of

the

show

ft

peer

CLI

command

output

on

the

ACE

(module

or

appliance)
should
indicate

no

errors.

See

either

the

Cisco

Application

Control

Engine

Module

Administration
Guide
or

Cisco

4700

Series

Application

Control

Engine

Appliance

Administration

Guide

for

details
on
the

show

ft

peer

CLI

command.

–

If

the

SRG

Compatibility

field

indicates

a

problem,

this

means

that

the

versions

of

the

ACE
software
running

on

the

devices

are

not

compatible

with

each

other.

One

or

both

of

the

devices
will
need

to

have

an

appropriate

version

of

the

ACE

software

installed

before

they

can

be
synchronized.