Hi everybody!
Nowadays, customers want reliable services. They have little tolerance for service interruptions. Especially business users. Because of that, we must have protection in downstream, upstream protection and redundancy component in OLT.
In this theme, I want to explain device-level protection – OLT.
The next figure shows an example of OLT – MA5800-X15. OLT has redudant componets. It is a large-capacity OLT. This MA5800-X15 has 19 inch frame-shaped OLT, 300mm deep, 11 U hight. There are 2 slots for control boards, 15 slots for service boards and 2 DC power boards.
OLT support protection mode:
Power boards. OLT has 2 power boards – active and standby power boards. If OLT has a problem with the active power board, standby power board will enable constant stable power supply for OLT.
Control boards. OLT has 2 control boards – active and standby. Both boards work in a normal state. When configuration OLT, we configure it in active control board. With command TEST(config)#save, we will save configuration on the standby control board. Because of this, if active control board faulty, system will normal work with the standby control board. In this part of the system, we use upstream network protection (link aggregation group, protection group – port state mode, time delay mode and Huawei solution Smart link protection group).
Service boards. OLT has many slots for service boards, min slots are 2 (e.g. MA5800-X2) and max slots are 17 (e.g. MA5800-X17). Because there are many slots for service boards, if we have a problem with slot or service boards – we can change slot or service boards. In this part of the system, we use downstream network protection (type B single/dual-homing protection or type C single/dual-homing protection).
Thank you!
