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Configuring Traffic Filters and Protocol Prioritization

B-6

303543-A Rev 00

Table B-2 lists sample user-defined criteria, ranges, and actions for some common

filtering goals.

Table B-2. User-Defined Criteria and Ranges for Sample Inbound Traffic Filters

User-Defined Criteria

Filtering Goal Reference Field Offset Length Range

Drop inbound

Telnet and FTP

traffic on the

synchronous

interface that

receives packets

from the Internet

IP HEADER_END 107

109

1 0x0 to 0x0

Give certain

VINES traffic that

is bridged over

Ethernet

precedence over

all other traffic

Specify an Ethernet

Type value of

0xBAD (VINES)

160 bits (sum of all

criteria that precede the

Destination Network field,

48+48+16+16+16+8+8)

32 bits Specify the

hexadecimal

Destination

Network number

(for example,

1234).

On a DLSw

circuit, filter on

NetBIOS Names

DLS_DATA_START 376 (Destination

NetBIOS Names)

504 (Source NetBIOS

Names)

The offset of 376 applies

only if you want to filter

the beginning of the

NetBIOS Name field. If

you want to find a

particular section of the

NetBIOS Name, increase

the offset by

X * 8, where X is the

number of bytes into the

NetBIOS Name field.

NetBIOS Names

are up to 16 bytes

long. How they are

oriented in the

field (right justified

or left justified)

may depend on

the application.

Before creating

the filter criteria,

use an analyzer to

check the packets.

Specify NetBIOS

Name ranges,

using the ASCII

equivalent of the

first 15 characters

in the name. For

names with less

than 15

characters, use

0x20 as pad

characters.

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 161 162

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