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All productsMPLA board is the main control board of MA5800 X7/15/17. It is the core of the system control and service switching and aggregation. The MPLA board can also function as the management and control core of the integrated network management system (NMS). It communicates with service boards about the key management and control information through the master/slave serial port and inband GE/10GE channel. In this manner, the MPLA board configures, manages, and controls the device, and also implements the simple route protocol functions.
There are three hardware versions of MPLA, H901MPLA, H902MPLA and H903MPLA, Below is a detailed comparison lists among the three versions, “Yes” indicates “supported” and “No” indicates “not supported”.
| Board Specifications | H901MPLA | H902MPLA | H903MPLA |
| Bandwidth per slot (load balancing mode) | 100 Gbit/s | 100 Gbit/s | 100 Gbit/s |
| Upstream or cascading port | 4 x 10GE/GE ports | 4 x 10GE/GE ports | 4 x 10GE/GE ports |
| ALM port | No | No | No |
| BITS/TOD port | No | No | No |
| MAC address table size | 262143 | 262143 | 262143 |
| Access ONTs | 17408 | 17408 | 17408 |
| Multicast users | 17408 | 17408 | 17408 |
| Static programs | ·4096 (earlier than V100R017C00)
·8192 (V100R017C00 and later versions) |
8192 | 8192 |
| Online programs | V100R016C00: 4000
V100R016C10: |
·IPv4: 8000 ·IPv6: 2000 |
·IPv4: 8000 ·IPv6: 2000 |
| IPv4 routing table size | 65536 | 65536 | 65536 |
| IPv6 routing table size | 16384 | 16384 | 16384 |
| Service ports | 139264 | 139264 | 139264 |
| ND table size | 16384 | 16384 | 16384 |
| ARP table size | ·66048 (earlier than V100R017C10)
· 98816 (V100R017C10) ·131072 (V100R018C00 and later versions) |
·66048 (V100R017C00)
·98816 (V100R017C10 version) ·131072 (V100R018C00 and later versions) |
131072 |
| Ethernet synchronization | Yes | Yes | Yes |
| 1588v2 | Yes | Yes | Yes |
| 1588ACR | Yes | Yes | Yes |
| D-CCAP | Yes | Yes | Yes |
When configuring the boards of the MA5800 series OLT MA5800-X7/X15/X17, if both the active and standby control boards are configured, you need to periodically check whether the data of the active control board is synchronized to the standby control board to ensure reliable running of the system.
If necessary (for example, the active control board is faulty), you need to manually perform active/standby switchover to improve reliability of the system. An active/standby switchover involves only control plane switchover. The forwarding plane works in load sharing mode and therefore it continuously forwards services.
When the software version of the active control board is inconsistent with the software version of the standby control board, the system capacity for backing up the service is affected. When the active control board is faulty, the active/standby switchover may fail, or the service cannot fully recover after the active/standby switchover.
Software version of MPLA are in below:
| Part Number | External Model | Description | Start Version |
| 03022XTN | H901MPLA | Main Processing Board | V100R015C00 |
| 03024GDV | H902MPLA | Main Processing Board | V100R017C00 |
| 03025KFE | H903MPLA | Main Processing Board | V100R019C10 |
In addition, there are two kind daughter boards CKUA and CKUB of main control boards, the detail comparisons in below chart:
| Daughter Board | Corresponding Control Board | Function |
| H901CKUA/H902CKUA | H901MPLA H902MPLA H903MPLA |
Implements clock processing and provides the stratum-3 clock for the system. Implements the 1588v2 clock processing function. Implements the 1588ACR clock processing function. (Supported by V100R016C10 and later). |
| H901CKUB/H902CKUB | H901MPLA H902MPLA H903MPLA |
Implements clock processing and provides the stratum-3 clock for the system. Implements the 1588v2 clock processing function. |
If you have any pending issues about MPLA after reading this article, please email us at sales@thunder-link.com