Zesr Related Concepts - Zte ZXR10 2900 Series User Manual

than STP protocol and the topology convergence speed is more
fast.

ZESR Related Concepts

1. ZESR Ring
A ZESR ring physically corresponds to an Ethernet ring topol-
ogy. A ZESR area consists of multiple ZESR rings. One ring is
the major-level, others are the segment linking with the ma-
jor-level. If there is only one ring in ZESR area, then it is the
main-level.
2. ZESR Control VLAN
Each ZESR area has a control VLAN. The ZESR protocol mes-
sage is transmitted in the control VLAN.
3. ZESR Protected VLAN
Each ZESR area has multiple protect VLANs. The users' service
is transmitted in the protect VLAN. Realize the service traffic
protection in layer-2 by the link switch of ZESR Protected Vlan.
4. Master Node
Master node is the primary control node. The primary ring and
the segment of each level have a node respectively (It can be
combined to one, master edge-port). It takes charge in the
control of the primary ring and the segment of each level.
5. Transmission Node
The nodes except the master node in ZESR ring are transmis-
sion node. It mainly assists the master to do loop inspection
and service switching.
6. Edge Node
The node connects with more than 2 levels in ZESR ring is
called edge node. The edge node can be transmission node
(contains 2 ports), master node (contains 2 ports) or assistant
port (contains 1 port).
7. Assistant Node
The assistant port is also edge port. It is the transmission
node that has only one port in the relative segment. It mainly
assists the master node to achieve service switching for the
segment. As shown in "ZESR Multi-ring Multi-domain Design
Figure", major ring is composed of S1, S2, S3 and S4. Of
which S1 is master node, others are transmission node. Level 1
segment 1 is composed of S3, S4, S5 and S6. Of which S3 and
S4 are assistant nodes, S5 is master node, S6 is transmission
node. Level 1 segment 2 is composed of S3, S4 and S7. Of
which S3 and S4 are assistant nodes, S7 is master node.
8. Smart-link node
The smart-link is a simple expansion for the former ZESR func-
tion and realizes the protection for key service link. As shown
in "SMART-LINK", when the link goes wrong, it can switch au-
tomatically and carry out malfunction response in time.
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Chapter 7 Service Configuration
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