Huawei OptiX OSN 7500 - Protection; Figure 6-5 Application of EVPLAN Service

OptiX OSN 7500
Technical Manual - System Description 6 Data Features
Huawei Technologies Proprietary
6-7
Branch C
P
Branch A
Headquarters
Branch B
PE
PE
PE
Address =
MAC C
Address =
MAC A
Address =
MAC B
Address =
MAC H
Sink VC LabelTunnel Label
MAC A
101
MAC B
202
MAC C
303
Source
MAC H
MAC H
MAC H
LSP
LSP1
LSP2
LSP3
MPLS
Core
LSP1 LSP2
LSP3
P
PE
Transferd to
corresponding
port via the Layer
2 route table
Figure 6-5 Application of EVPLAN service
6.1.3 Protection
The Ethernet service of the OptiX OSN equipment takes the protection of several
levels, including:

Protection of the spanning tree, LCAS and flow control

Protection of optical transmission layer, such as MSP and SNCP
1. LCAS
LCAS provides an error tolerance mechanism, enhancing the reliability of
concatenation. It has the following functions:

Configure the system capacity, add or reduce the number of VC involved in the
concatenation and change the service bandwidth dynamically without damaging
the service.

Protect and recover failed members.
As shown in Figure 6-6, LCAS can add or delete members to increase or decrease
the bandwidth dynamically without affecting the service.