
Configuring Traffic Filters and Protocol Prioritization
B-6
308645-14.00 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,
or
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.
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