10-5

User

Guide

for

the

Cisco

Application

Networking

Manager

5.2

OL-26572-01

Chapter

10

Configuring

Parameter

Maps

Configuring

Connection

Parameter

Maps

Smallest

TCP

MSS

(Bytes)

Size

of

the

smallest

segment

of

TCP

data

that

the

ACE

is

to

accept.

Valid

entries

are

from

0

to

65535

bytes.

The

value

0

indicates

that

the

ACE

is

not

to

set

a

minimum

limit.

Largest

TCP

MSS

(Bytes)

Size

of

the

largest

segment

of

TCP

data

that

the

ACE

is

to

accept.

Valid

entries

are

from

0

to

65535

bytes.

The

value

0

indicates

that

the

ACE

is

not

to

set

a

maximum

limit.

SYN

Retries

Number

of

attempts

that

the

ACE

is

to

make

to

transmit

a

TCP

segment

when

initiating

a

Layer

7

connection.

Valid

entries

are

from

1

to

15.

The

default

is

4.

TCP

WAN

Optimization

RTT

Option

that

specifies

how

the

ACE

is

to

apply

TCP

optimizations

to

packets

on

a

connection

associated

with

a

Layer

7

policy

map

using

a

round-trip

time

(RTT)

value.

The

choices

are

as

follows:

•

An

entry

of

0

(zero)

indicates

that

the

ACE

is

to

apply

TCP

optimizations

to

packets

for

the

life

of

a

co

nnection.

•

An

entry

of

65535

(the

default)

indicates

that

the

ACE

is

to

perform

normal

operations

(that

is,

without

optimizations)

for

the

life

of

a

connection.

•

Entries

from

1

to

65534

indicate

that

the

ACE

is

to

use

the

following

guidelines:

•

If

the

actual

client

RTT

is

less

than

the

configured

RTT,

the

ACE

performs

normal

operations

for

the

life

of

the

connection.

•

If

the

actual

client

RTT

is

greater

than

or

equal

to

the

configured

RTT,

the

ACE

performs

TCP

optimizations

on

the

packets

for

the

life

of

a

connection.

Valid

entries

are

from

0

to

65535.

Ti

me

o

u

t

F

o

r

Embryonic

Connections

(Seconds)

Number

of

seconds

that

the

ACE

is

to

wait

before

timing

out

an

embryonic

connection,

which

is

a

TCP

three-way

handshake

for

a

connection

that

does

not

complete

for

some

reason.

Valid

entries

are

from

0

to

4294967295.

The

default

is

5.

A

value

of

0

indicates

that

the

ACE

is

never

to

time

out

an

embryonic

connection.

Half

Closed

Timeout

(Seconds)

Number

of

seconds

the

ACE

is

to

wait

before

closing

a

half-closed

connection,

which

is

one

in

which

the

client

or

server

sends

a

FIN

and

the

server

or

client

acknowledges

the

FIN

without

sending

a

FIN

itself.

Valid

entries

are

from

0

to

4294967295.

The

default

is

3600

(1

hour).

A

value

of

0

indicates

that

the

ACE

is

never

to

time

out

a

ha

lf-closed

connection.

Slow

Start

Algorithm

Check

box

that

enables

the

slow

start

algorithm.

When

enabled,

the

slow

start

algorithm

increases

TCP

window

size

as

ACK

handshakes

arrive

so

that

new

segments

are

injected

into

the

network

at

the

rate

at

which

acknowledgements

are

returned

by

the

host

at

the

other

end

of

the

connection.

Uncheck

the

check

box

to

disable

the

slow

start

algorithm.

This

option

is

disabled

by

default.

SYN

Segments

With

Data

Action

that

the

ACE

takes

to

handle

TCP

SYN

segments

that

contain

data:

•

Allow—The

ACE

i

s

to

permit

SYN

segments

that

contain

data

and

mark

t

hem

for

processing.

•

Drop—The

ACE

is

to

discard

SYN

segments

that

contain

data.

Table

10-2

Connection

Parameter

Map

Attributes

(continued)

Field

Description