5-8

User

Guide

for

the

Cisco

Application

Networking

Manager

5.2

OL-26572-01

Chapter

5

Importing

and

Managing

Devices

Preparing

Devices

for

Import

ANM

Requirements

for

ACE

High

Availability

ANM

automatically

identifies

ACE

high

availability

(HA)

peers

if

both

peers

are

imported

into

ANM.

For

ANM

to

identify

two

ACE

devices

(ACE

modules

or

ACE

appliances)

as

high

availability

peers,

ANM

looks

for

two

ACE

devices

with

t

he

same

fault-tolerant

(FT)

interface

VLAN

configuration

and

whose

peer

IP

addresses

are

reversed.

For

example,

ANM

would

consider

Peer

1

with

the

following

configuration:

ft

interface

vlan

4000

ip

address

10.10.10.1

255.255.255.0

peer

ip

address

10.10.10.4

255.255.255.0

and

Peer

2

with

the

following

configuration:

ft

interface

vlan

4000

ip

address

10.10.10.4

255.255.255.0

peer

ip

address

10.10.10.1

255.255.255.0

as

HA

peers

because

they

bot

h

use

FT

interface

VLAN

4000

and

their

IP

an

d

peer

IP

addresses

ar

e

reversed.

However,

it

is

possible

that

multiple

ACE

devices

imported

into

ANM

have

the

same

FT

interface

VLAN

and

IP

address/peer

IP

address

combinations.

In

this

case,

ANM

is

not

able

to

identify

the

ACE

HA

pair

correctly.

To

resolve

this

issue,

ANM

uses

the

following

logic

to

determine

that

two

ACE

devices

are

an

HA

pair:

1.

Two

ACE

devices

could

be

identified

as

a

HA

pair

if

their

FT

interface

VLAN

IDs

match

and

their

FT

interface

IP

and

peer

IP

addresses

are

reversed.

2.

If

the

Admin

context

management

interface

peer

IP

address

is

already

defined,

ANM

will

conclusively

identify

its

HA

peer

if

the

other

Admin

context

management

interface

reversely

matches

the

management

IP

and

peer

IP

addresses.

3.

If

both

ACE

Admin

context

management

interface

peer

IP

addresses

are

not

defined,

and

their

FT

interface

configuration

combination

is

unique

across

all

ACE

devices,

ANM

will

then

identify

them

as

an

HA

pair.

4.

An

ACE

HA

peer

is

identified

as

Inconclusive

if

there

is

a

non

unique

FT

interface

configuration

combination

across

all

ACE

devices

and

its

Admin

context

management

interface

peer

IP

is

not

defined.

When

importing

an

ACE

HA

pair

into

ANM,

you

should

follow

one

of

t

he

following

configuration

requirements

so

that

ANM

can

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

is

always

uni

que

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).

The

management

IP

address

and

management

peer

IP

address

used

for

this

definition

should

be

t

he

management

IP

ad

dress

used

to

import

bot

h

ACE

devices

into

ANM.

An

example

is

as

follows:

•

ACE1

i

s

imported

i

nto

ANM

with

management

IP

10.10.10.10.

•

ACE2

i

s

imported

i

nto

ANM

with

management

IP

10.10.10.12.

In

this

case,

you

would

perform

the

following

actions

for

both

ACE1

and

ACE2:

•

Update

the

management

interface

on

ACE1

with

IP

address

10.10.10.10.

to

have

10.10.10.12

as

the

peer

IP

address.