3Com CoreBuilder 7000, Руководство по эксплуатации

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88 C
HAPTER
4: P
RIVATE
N
ETWORK
-
TO
-N
ETWORK
I
NTERFACE
(PNNI) V
ERSION
1.0
mechanisms that ensure that the data will be transferred without having
to send a disconnect message to the source.
Establishing a
Channel in PNNI with
a Flat Network
In this section, the example shown in Figure 27 will be used. Node A.1.1
wants to establish a connection to send data to node A.2.6.
Figure 27 Sending a Signal Between Two Nodes
There are many paths that the signal can take. Based on reachability, QoS
metrics and current information available about the links, the path from
A.1.1 to A.2.6 is chosen, and a DTL is created. Since the network has no
groups, the DTL would include every node in the path. A signal with
PVPC (Permanent Virtual Path Connection) and PVCC (Permanent Virtual
Channel Connection) is created and a set of DTLs are generated. The
A.1.1
A.1.2
A.1.3
A.1.4
A.1.5
A.1.6
A.1.7
A.1.8
A.1.9
A.2.0
A.2.1
A.2.2
A.2.3
A.2.4
A.2.5
A.2.6
A.2.7
Source
Destination
Physical Link
Chosen Path
DTL for the chosen path:
A.1.1, A.1.3, A.1.2, A.1.5, A.1.7, A.2.3, A.2.2, A.2.1, A.2.5, A.2.6