10-4

User

Guide

for

the

Cisco

Application

Networking

Manager

5.2

OL-26572-01

Chapter

10

Configuring

Parameter

Maps

Configuring

Connection

Parameter

Maps

More

Settings

Exceeds

MSS

Action

that

the

ACE

takes

to

handle

segments

that

exceed

the

maximum

segment

size

(MSS):

•

Allow—The

ACE

is

to

permit

segments

that

exceed

the

configured

MSS.

•

Drop—The

ACE

is

to

discard

segments

that

exceed

the

configured

MSS.

Max.

Connection

Limit

Maximum

number

of

concurrent

connections

to

allow

for

the

parameter

map.

Valid

entries

are

from

0

to

4000000.

Nagle

Check

box

th

at

en

ables

th

e

Nagle

al

gorithm,

which

instructs

a

s

ender

to

buffer

any

data

t

o

be

sent

until

all

outstanding

data

has

been

acknowledged

or

until

there

is

a

full

segment

of

data

to

send.

Enabling

the

Nagle

algorithm

increases

throughput,

but

it

can

increase

latency

in

your

TCP

connection.

Uncheck

the

check

box

to

disable

the

Nagle

algorithm.

Note

Disable

the

Nagle

algorithm

when

you

observe

unacceptable

delays

in

TCP

connections.

Random

Sequence

Number

Check

box

that

enables

the

use

of

random

TCP

sequence

numbers,

which

adds

a

measure

of

security

to

TCP

connections

by

making

it

more

di

fficult

for

a

hacker

to

guess

or

pr

edict

the

next

sequence

number

in

a

TCP

connection.

Uncheck

the

check

box

to

disable

the

use

of

random

TCP

sequence

numbers.

This

option

is

enabled

by

default.

Bandwidth

Rate

Limit

Option

that

appears

for

ACE

modules

only.

Enter

the

bandwidth-rate

limit

in

bytes

per

second

for

the

parameter

map.

Valid

entries

are

from

0

to

300000000

bytes.

Connection

Rat

e

Limit

Connection-rate

limit

in

connections

per

second.

Valid

entries

are

from

0

to350000.

Reserved

Bits

Action

that

the

ACE

takes

to

handle

segments

with

the

reserved

bits

set

in

the

TCP

header:

•

Allow—Segments

with

the

reserved

bits

are

to

be

permitted.

•

Drop—Segments

with

the

reserved

bits

are

to

be

discarded.

•

Clear—Reserved

bits

in

TCP

headers

are

to

be

cleared

and

segments

are

to

be

allowed.

Type-of-Service

IP

Header

Type

of

service

for

an

IP

packet

that

determines

how

the

network

handles

the

packet

and

balances

its

precedence,

throughput,

delay,

reliability,

and

cost.

Enter

the

type-of-service

value

to

be

applied

to

IP

packets.

Valid

entries

are

from

0

to

255.

For

more

i

nformation

about

t

ype

of

service,

refer

to

RFCs

791

,

1122,

1349,

and

3168.

ACK

Delay

Time

(Milliseconds)

Number

of

milliseconds

that

the

ACE

is

to

wait

before

sending

an

acknowledgement

from

a

client

to

a

server.

Valid

entries

are

from

0

to

400.

TCP

Buffer

Share

(Bytes)

Option

that

appears

for

onl

y

ACE

modules.

To

improve

throughput

and

overall

performance,

t

he

ACE

buffers

the

number

of

bytes

you

specify

before

processing

received

data

or

transmitting

data.

Use

this

option

to

increase

the

default

buffer

size

and

thereby

realize

improved

network

performance.

Enter

t

he

maximum

si

ze

of

t

he

TCP

buffer

in

bytes.

Valid

entries

are

from

8192

t

o

262143

bytes.

Default

is

32768.

Note

If

you

enter

a

value

in

this

field

for

an

ACE

device

that

does

not

support

this

option,

an

error

message

appears.

Leave

this

field

blank

when

creating

or

modifying

a

connection

parameter

map

for

devices

that

do

not

support

this

option.

Table

10-2

Connection

Parameter

Map

Attributes

(continued)

Field

Description