Chapter 4 Service Configuration
Figure 4-37 ZESR Multi-Ring Multi-Domain Design Figure
à
Basic Operation Principle of Non Level 0 Segment Link
Hierarchical ZESR technology is brought into the complex network. The running
of ZESR protocol on segment link of one level is based on that the upper level
primary ring or segment link is not down.
As shown in
Figure 4-38
, S3~S6 compose the segment links of level 1 segment
1, where S3 and S4 are assistant nodes and S5 is the master node. S3 and S4
can always intercommunicate with each other via primary ring. If all links where
S3, S4, S5 and S6 locate on segment 1 of level 1 are up, master node S5 will
block its secondary port, and if the states of some links are Down, the secondary
port of the master node will be enabled.
Figure 4-38 Non level 0 Segment Link
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