IBM 8285 Nways, Installation And User Manual

Page: 241 / 265

Reserved 2 bytes set to binary zero.
RDN Routing Domain Number (2 bytes)
Specifies a domain that is unique within one of the following:
E.164
DCC/DFI/AA
ICD/DFI/AA
and that allows for the same addressing scheme and administrative authority to be used.
Area Area (2 bytes)
Specifies an area unique within a routing domain for the purpose of hierarchical routing and
efficient use of resources based on topological significance.
In an workgroup switch ATM subsystem, this value consists of two 1-byte subfields:
ACN The ATM Cluster Number
HN The Hub Number
End System Part
The fields that make up the End System part of an ATM address are:
ESI End System Identifier (6 bytes)
Identifies an end system unique within an area or within any larger addressing structure such
as the IEEE MAC address space. Not used for routing within the ATM network.
SEL SELector (1 byte)
Has local significance only within the end system.
Appendix D. ATM Address Formats in the ATM Workgroup Switch
213