8-16
User
Guide

for

the

Cisco

Application

Networking

Manager

5.2
OL-26572-01
Chapter
8






Configuring

Real

Servers

and

Server

Farms
Managing
Real

Servers
Step
5
From
the
Suspend
Real

Servers

Type

drop-down

list,

choose

one

of

the
following:

•
Graceful—When
executed

on

a

primary

server,

the

ACE

gracefully

shuts
down
the

server

with
sticky
connections

as

fo

llows:

–

Tears

down

existing

non-TCP

connections

to

the

server

–

Allows

current

TCP

connections

to

complete

–

Allows

new

sticky

connections

for

existing

server

connections

that

match

entries

in

the

sticky
database

–

Load

balances

all

new

connections

(other

than

the

matching

sticky

connections

mentioned
above)
to

the

other

servers

in

the

server

farm
When
executed

on

a

backup

real

server,

the

ACE

places

the

backup

server

in

service

standby

mode.
Note
For
the

CSS,

when

the

device

is

in
the
In

Service

admin

state

and
you

perform

a

graceful

suspend
operation,
ANM

saves

the

last

known

non-zero

service

(or

real

server)

weight,

and

then

sets

the
weight
to

zero.

ANM

references

the

saved

weight

when

performing

an

Activate

operation.

If

the
current
weight

is

zero,

and

a

non-zero

weight

has

been

saved

for

that

service

(or

real

server),

the
Activate
operation

also

sets

the

weight

to

the

saved

value.
To
allow

ANM

to

save

and

reset

the

weight

value

when

gracefully

suspending

and

then
activating
the

CSS,

you

must

have

the

device

configured

to

permit

SNMP

traffic.

For

each

device
type,
see

the

corresponding

configuration

guide

to

configure

the

device

to

permit

SNMP

traffic.


When
the

CSS

is

in

the

In

Service

Standby

admin

state

and

you

perform

a

graceful

suspend
operation,
ANM

does

not

set

the

weight

to

zero.
Note
Graceful
suspend

and

suspend

options

vary

by

device

type.

For

the

commands

deployed

by

the
device
type

when

these

options

are

selected,

see

the

“CLI

Commands

Sent

from

the

Real

Server
Table”
section

on

page

8-23 .

•
Suspend—The
ACE

resets

all

non-TCP

connections

to

the

server.
For
TCP

connections,

existing
flows
are

allowed

to

complete

before

the

ACE

takes

the

real

server

out

of

service.

No

new
connections
are

allowed.

The

ACE

resets

all

Secure

Sockets

Layer

(SSL)

connections

to

the

real
server.

•
Suspend
and

Clear

Connections—Performs

the

tasks

described

for

Suspend

and

clears

the

existing
connections
to

this

server.
Step
6
Do
one

of

the

following:

•
Click
Deploy
Now

to

suspend

the

server

and

to

return

to
the
Real

Servers

table.

The

server
appears
in
the

table

with

the

status

Out

Of

Service.

•
Click
Cancel
to

exit

this

procedure

without

suspending

the

server

and

to

return

to

the

Real
Servers
table.
Related
Topics

•
Managing
Real

Servers,

page
8-9

•
Managing
Real

Server
Groups,
page
8-10