Alcatel Omni Switch/Router, Руководство пользователя

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Defining and Configuring AutoTracker Policies
Page 20-13
Defining Your Own Rules
A user-defined rule enables you to include all devices in the mobile group or AutoTracker
VLAN
that originate frames containing a specified pattern at a specified location. Each user-
defined rule requires an Offset, a Value, and a Mask; you will be prompted for each of these
values. The Offset specifies the location of the pattern within the frame. The Value specifies
the pattern. The Mask specifies the bits that you care about within the Value pattern.
After you enter the Administrative Status for this mobile group or AutoTracker
VLAN
, the
following menu displays:
Select rule type:
1. Port Rule
2. MAC Address Rule
21) MAC Address Range Rule
3. Protocol Rule
4. Network Address Rule
5. User Defined Rule
6. Binding Rule
7. DHCP PORT Rule
8. DHCP MAC Rule
81) DHCP MAC Range Rule
Enter rule type (1):
1. Enter
5
and press
<Return>
.
2. The following prompt displays:
Set Rule Admin Status to ((e)nable/(d)isable):
Indicate whether or not you want to enable the Administrative Status for this rule. Type
e
to enable or
d
to disable. If you enable the rule, the switch will use it to determine
membership of devices. If you disable the rule, then the switch will not use this rule, but
the parameters you set up will be saved. The Admin Status for a Policy is different from
the Admin Status for the mobile group or AutoTracker
VLAN
as it controls only to this
specific rule. You can enable or disable the rule at a later time using the
modatvl
command.
3. The following prompt displays:
Enter the Offset into the frame ( < 64) :
Enter an
Offset
value, in number of bytes, to define the location where the
Value
– or
pattern – is found. The offset value can be any number from 0 – 63. The first byte of the
frame’s
MAC
header is considered byte 1. An offset of 0 specifies that the pattern begins in
byte 1 of the frame.
As an example, enter an offset value of
14
if you want to specify the pattern that defines
NETBIOS
, because that pattern begins in the 21st byte of the frame.
4. The following prompt displays:
Enter the value of the pattern to match:
Enter a
Value
, in hex, to specify the pattern itself. The value can be a maximum of eight
bytes. For example, enter
F0F0
to specify the pattern that identifies
NETBIOS
.
5. The following prompt displays:
Enter the mask for the pattern to match:
Enter a
Mask
value, in hex, to specify the bits within the
Value
that you care about. The
mask can be a maximum of eight bytes, but must be the same length as the
Value
you
entered. The mask value is
AND
ed with the
Value
and frames are searched for the result.