3Com CoreBuilder 7000 Operation Manual page 56

56 C 3: E-IISP P
HAPTER
AFI
ROTOCOL
AFI Specific Fields
Network Prefix
Figure 11 ATM Address Components
The ATM address has 20 bytes, which are divided into a 13-byte Network
Prefix and a 7-byte User Part. These are further divided into fields shown
in Table 17.
Table 17 Fields of the ATM Address
Field Description
AFI Authority Format Identifier — identifies one of three formats of the ATM
address:


* (39)H- Data Country Code (DCC)


* (45)H- E.164


* (47)H- International Code Designator (ICD)
RD Routing Domain — identifies a unique Routing Domain within the ATM
k
networ
AREA Area — identifies a unique area within the Routing Domain
ESI End Station Identifier — identifies a unique device within the specified
network
SEL Selector Field — still under consideration by the ATM Forum
The AFI and AFI-specific fields should be the same. The default value is
47.00.00.00.00.00.3C.00.00, but the network manager can configure
these fields to a different value as long as the same value is used in all the
nodes. The fields RD and AREA are not fixed by the system and are
available for definition by the operator as shown in Figure 12.
RD AREA ESI SEL
User