13-24
User
Guide

for

the

Cisco

Application

Networking

Manager

5.2
OL-26572-01
Chapter
13






Configuring

High

Availability
Tracking
ACE

VLAN

Interfaces

for

High

Availability
2.
If
the

resulting

priority

value

is

less

than

that

of
the
standby
member,
the
active
member

switches
over
and

the

standby

member

becomes

the

new

active

member.

All

active

flows

continue
uninterrupted.
3.
When
the

failed

member

comes

back

up,

its

priority

is

incremented

by

10.
4.
If
the

resulting

priority

value
is

greater

than

that

of

the

currently

active

member,

a

switchover

occurs
again,
returning

the

flows

to

the

originally

active

member.
Note
In
a

user

context,
the
ACE

allows

a

switchover

only

of

the

fault-tolerant

groups

belonging

to

that
context.
In
an

Admin

context,

the

ACE

allows

a

switchover

of

all

fault-tolerant

groups

on

all

configured

contexts
on
the

ACE.
Related
Topics

•
Configuring
ACE

High

Availability

Groups,

page
13-17

•
Tracking
ACE
VLAN

Interfaces

for

High

Availability,

page
13-24

•
Tracking
Hosts
for

High
Availability,
page
13-25
Tracking
ACE

VLAN

Interfaces

for

High

Availability
You
can

configure

a

t

racking

and

failure

detection

pr

ocess

for


a

VLAN

i

nterface.
Procedure
Step
1
Choose
Config
>

Devices

>

admin_context

>

HA

Tracking

And

Failure

Detection

>

Interfaces.
The
Track

Interface

table

appears.
Step
2
Click
Add
to

add

a

new

tracking

process

to

this

table,

or
choose
an

existing

entry

and

click
Edit
to
modify
it.
The
Track

In

terface

con

figuration

window

app

ears.
Step
3
In
the

Track

Object

Name

field

of

the

Track

Interface

configuration

window,

enter

a

unique
identifier
for
the
tracking

process.
Valid
entries

ar

e

unquoted

text

strings

with

no

spaces.
Step
4
In
the

Priority

field,
enter
the

priority

for
the
interface

on

the

active

member.
Valid
entries

are

from

0

to

255

with

higher

values

indicating

higher

priorities.

The

values

that

you

enter
here
and

in

the

Interface

Peer

Priority

field

(see

Step

6 )

reflect

the

point

at

which

you

want

switchover
to
occur.

If

the

tracked

interface

goes

down,

the

priority

of

that

fault-tolerant

group

is

decremented

by
the
value

entered

in

the

Priority

field.

If

the

priority

of

the

fault-tolerant

group

on

the

active

member

falls
below
that

of

the

standby

member,

a

switchover

occurs.
Step
5
In
the

VLAN

Interface

field,

choose

the

fault-tolerant

VLAN

that

you
want
the
active
member

to

track.
Step
6
In
the
Interface

Peer

Priority

field,

enter

the

priority

for

the

interface

on

the

standby
member.
Valid
entries

are

from

0

to

255

with

higher

values

indicating

higher

priorities.

The

values

that

you

enter
here
and

in

the

Priority

field

(See

Step

4 )

reflect

the

point

at

which

you

want

switchover

to

occur.

If

the
tracked
interface

goes

down,

the

priority

of

that

fault-tolerant

group

is

decremented

by

the

value

entered
in
the

Interface

Peer

Priority

field.

If

the

priority

of

the

fault-tolerant

group

on

the

active

member

falls
below
that

of

the

standby

member,

a

switchover

occurs.