The area address is the first 26 characters of each Alcatel-Lucent 1665 DMX Network Services Access Point (NSAP). [Alcatel-Lucent 1665 DMX supports a fixed-length 40-character (20-byte) NSAP only.] The first eight characters of the NSAPs are always the same and cannot be changed. The remaining 18 characters of the NSAP area address are provisionable but only the Area field should be changed to assign a node to a different area. The remainder of the NSAP includes the System Identifier field, which is unique to each node, and the Selector (SEL) field.
The following table provides a break-down of an NSAP.
|
NSAP Field: |
AFI |
IDI |
IDI PAD |
DFI |
Org.ID |
RES |
RD |
Area |
System ID |
SEL |
|---|---|---|---|---|---|---|---|---|---|---|
|
Bytes: |
1 |
2 |
1 |
3 |
2 |
2 |
2 |
6 |
1 | |
|
Default Value: (hex) |
39 |
840 |
F |
80 |
000000 |
0000 |
0000 |
0000 |
none |
00 |
|
not provisionable |
user provisionable |
not provisionable | ||||||||
A group of nodes are assigned to an area by changing each node's NSAP Area field to the same value. The entire NSAP area address must be identical for all nodes in an area and different from the NSAP area addresses for all other areas.
If more than one separate area with the same area address exists, routing to these areas from other areas would not be predictable and couldn't be expected to function properly.
The Area field consists of four hexadecimal characters, with a default value of 0000 (hex). TL1 command ENT-ULSDCC-L3 can be used to change the Area field.
Despite the technical differences between the area address and the Area field described previously, the term area address is commonly used to refer to the Area field value. Thus, for convenience, the term area address is used throughout this document.
Multiple area addressing is the capability for a node to be assigned more than one area address. The provisioning of multiple area addresses is not supported on Alcatel-Lucent 1665 DMX, directly.
| November 2011 | Copyright © 2011 Alcatel-Lucent. All rights reserved. |