Figure 54 Multi-Ring Multi-Domain; Figure 55 Zesr Multi-Ring Multi-Domain Design Figure - Zte ZXR10 2900 Series User Manual

ZXR10 2900 Series User Manual
Basic Operation
Principle of Non
Level 0 Segment
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F 55 ZESR M
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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 56, 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 lo-
cate 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.
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