FS M6500 Series, Руководство по настройке

Страница: 106 / 185

M6500 Series NE Configuration Manual
105
6. Overhead Configuration
6.1. Configuration Rules
The G.709 standard defines the overhead function of the OTN frame structure and the network of each layer.
M6500adopts a lot of overhead bytes, which provides great convenience for equipment maintenance.
M6500usually configures overhead such as SM, PM, TCMi (i = 1 ~ 6)etc. This chapter describes in detail the
configuration methods of various overhead, including: configuration rules, configuration steps and
configuration examples.
6.1.1. SM, PM & TCMi Overhead Introduction
SM is the segment monitoring overhead byte of OTUk layer. By configuring the SM overhead, the performance
and fault monitoring of the electrical regeneration segment can be carried out.
PM is the path monitoring overhead byte of ODUk layer. By configuring the PM overhead, the performance and
failure of end-to-end wavelength service channel can be monitored.
The PM monitoring connection of the service should be established between the network elements of the
service two ends. The SM monitoring connection of the service should be established between the service
network element and the electrical relay network element or between the relay network element and the
power. This product has no electrical relay applications, so SM planning and PM planning are usually the same.
6.1.2. Overhead Configuration Rules
SM and PM monitoring overhead can be configured on branch interface cards, line interface cardsand optical
forwarding cards. The general principles are as follows (priority is determined in sequence):
1. SM must be terminated between the network elements at both ends of the power layer service, and the
intermediate network elements can go through the optical layer without overhead monitoring.
2. For non-OTUk/ODUk services, when it is multiplexed or mapped to OTUk/ODUk services, the OTUk/ODUk
services must establish PM connections, that is, PM connection enablement and monitoring enablement must
be activated.
3. For OTUk services, the network elements connected with PM overhead need to be configured, but PM
connection enablement must be prohibited.Monitoring enablement can be configured to "activate" or
"inactivate" and it is suggested that it be set to activate. For ODUk services, PM monitoring enablement must be
activated because there is no SM.
4. When OTUj / ODUj services are multiplexed and mapped to OTUk / ODUk (j < k) services, the location where
configuration monitoring enable "activation" / "inactivation" includes the call port (such as the Client / Port port)
and the call ODTUjk port.
6.1.3. TTI Configuration Rules
After configuring the connection enablement or monitoring enablement of SM and PM, TTI is also required to
be configured. TTI is a path trace marker that exists in PM and SM overhead bytes to test whether the
corresponding overhead is correctly connected.
TTI includes SAPI and DAPI. SAPI value and DAPI value sent by single card at the opposite end are required to be
consistent with SAPI value and DAPI value expected to be received by single card at the local end, and SAPI
value and DAPI value sent by single card single card at the local end are consistent with SAPI value and DAPI