Configuring The Pnni Network; Atm Address Format - 3Com CoreBuilder 7000 Operation Manual

84 C 4: P
HAPTER RIVATE
Configuring the
PNNI Network

ATM Address Format

IDP
IDP
AFI IDI
N - -N I
ETWORK TO ETWORK NTERFACE
When configuring a PNNI network, it is essential that each node has a
unique address which represents a picture of where the node is in the
hierarchy.
Topics covered in this section include:


ATM Address Format


Quality of Service Metrics


Creating a PNNI Network in the CoreBuilder 7000
PNNI uses the ATM Forum private address format. This format is a subset
of ISO 8348 NSAP addresses. Although the PNNI address is designed to
be hierarchical, it will also allow addresses that do not fit into any
hierarchy. The ATM address has 20 bytes. The 20 bytes are divided as
follows:


13 bytes for hierarchical positioning (Peer Group ID)


6 bytes for a flat station identifier (similar to an Ethernet address)


1 byte for a selector (not used for routing)
PGI
Figure 25 ATM Prefix Address Format
Table 22 explains the fields that are shown in Figure 25.
Table 22 Fields of the ATM Prefix Address
Field Bytes
AFI 1
IDI 1
IDP 2
PGI 10
ESI 6
SEL 1
DSP 17
(PNNI) V 1.0
ERSION
DSP
DSP
ESI
Description
Authority and Format Identifier
Initial Domain Identifier
Initial Domain Part
Peer Group Identifier
End Station Identifier
Selector Field
Domain Specific Part
SEL