3Com CoreBuilder 7000 Operation Manual page 95

A.1.1
A.1.2
A.2.2
A.1.3
v
v
A.3.1
A.3.2
Peer Group Leader
Source
Destination
Node to Where Signal
Cranked Back
A.2.1
A.2.3
B.2.2
X
B.2.1
X
DTL List for this Transmission:
DTL:[A.2.2, A.2.3]
DTL:[A.2]
DTL:[A,B,C]
Figure 34 Alternate Routing in a Hierarchy
In this example a new DTL is generated as shown and the signal is sent.
At no point in the process is the call released. This saves time and
prevents having to crankback completely to the source, thereby saving
valuable resources.
This chapter presented PNNI in theory. Details on how to implement and
configure the PNNI network are located in Chapter 13 in the
Management Guide.
B.1.2
B.1.3
B.1.1
B.1.4
B.2.3
Signal Failure
Chosen Path to Take
Physical Link
Alternate Route
Path of Alternate Route
PNNI Signaling Protocol
C.1.1
C.1.2
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