Path Selection - 3Com CoreBuilder 7000 Operation Manual

ATM Addressing Example
If we take peer groups A, B, and C from Figure 17 as an example, each
node in the groups would have the following ATM addresses as
presented in Table 23:
Table 23 ATM Prefix / Addresses for a Typical Network
Node
A.1.1
A.1.2.
A.1.3
A.2.1
A.2.2
A.2.3
A.3.1
A.3.2
B.1.1
B.1.2
B.1.3
B.1.4
B.2.1
B.2.2
B.2.3
C.1.1
C.1.2
* Group Leader
The PTSEs and the priority levels are created based on this addressing
scheme. For information on configuring the ATM addresses in PNNI, see
"Set ATM Address" on page 385 in the Management Guide.
In order for the channel to be made, a path must be chosen. Since ATM is

Path Selection

a connection-oriented technology, the path selected by PNNI for the
establishment of a VC or VP will remain in use for a potentially extended
period of time. This means that the consequences of an inefficient
routing decision will affect a connection for as long as that connection
remains open. Therefore, it is critical that PNNI selects the path correctly.
This selection is also known as source routing. PNNI allows the network
manager to specify the Quality of Service (QoS) and bandwidth
Prefix / Address
60.0.0.0.0.3c.0.20.11.5.A.1.1
* 60.0.0.0.0.3c.0.20.11.5.A.1.2
60.0.0.0.0.3c.0.20.11.5.A.1.3
60.0.0.0.0.3c.0.20.11.5.A.2.1
60.0.0.0.0.3c.0.20.11.5.A.2.2
60.0.0.0.0.3c.0.20.11.5.A.2.3
60.0.0.0.0.3c.0.20.11.5.A.3.1
* 60.0.0.0.0.3c.0.20.11.5.A.3.2
60.0.0.0.0.3c.0.20.11.5.B.1.1
*
60.0.0.0.0.3c.0.20.11.5.B.1.2
60.0.0.0.0.3c.0.20.11.5.B.1.3
60.0.0.0.0.3c.0.20.11.5.B.1.4
*
60.0.0.0.0.3c.0.20.11.5.B.2.1
60.0.0.0.0.3c.0.20.11.5.B.2.2
60.0.0.0.0.3c.0.20.11.5.B.2.3
*
60.0.0.0.0.3c.0.20.11.5.C.1.1
60.0.0.0.0.3c.0.20.11.5.C.1.2
Configuring the PNNI Network 85