Troubleshooting FiberHome AN5516: Configuration, Compatibility & Error Resolving

Overview & Thematic Scope

Welcome to our technical support FAQ for network engineers managing the FiberHome AN5516 OLT series. This guide addresses critical troubleshooting scenarios, focusing on the factory reset process, configuration management, and hardware compatibility for the AN5516-01, AN5516-04, and AN5516-06 chassis. We provide expert answers for pre-sales procurement and post-sales maintenance to help you maintain high availability in your FTTx network.

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Frequently Asked Questions

Q1: How do I perform a complete factory reset on a FiberHome AN5516 OLT via CLI?

To factory reset a FiberHome AN5516 OLT, you must clear the startup configuration and reboot the system. The definitive command sequence involves accessing the enable mode and executing the reset operation. However, direct hardware resets are not recommended. Instead, use the CLI to reset the configuration to default by clearing the saved config file. Typically, you would log in, enter enable mode, and use the command to reset the startup configuration, followed by a system reboot. Be aware that resetting the main control board (HSWA) will interrupt all ONU services . The precise CLI command often involves writing an empty configuration to the startup file or using the ‘reset’ command within the service context, which clears all custom VLANs, ONU authorizations, and uplink port settings .

Q2: What are the risks of using the physical reset button on the EC8B or HSWA boards?

Using the physical reset key on FiberHome service boards like the EC8B or GC4B can cause immediate service interruption and is strongly discouraged for routine maintenance . The hardware reset button forces a hard reboot of the specific card, bypassing the normal shutdown procedures. This can lead to data loss, corrupted configuration files, or a prolonged reboot cycle as the card re-initializes. The official hardware documentation emphasizes that reset operations should only be conducted during card maintenance or upgrades via software commands, not direct key presses .

Q3: What are the critical pre-configuration steps after a factory reset (authorizing cards)?

After a factory reset, the AN5516 system will not recognize any installed service boards until they are explicitly authorized. The essential post-reset task is to re-authorize your service cards via CLI using the `set card_auth` command. You must configure the slot and card type (e.g., EC4B, GC4B, HU1A). For example, to authorize a GC4B board in slot 14, you would use: `set card_auth slot 14 type gc4b`. Failure to do this will result in the cards remaining in an ‘unauthorized’ or ‘down’ state, preventing PON ports from coming online .

Q4: Does the AN5516 support dual control board redundancy to minimize downtime during resets?

Yes, the AN5516 series supports a High-Availability architecture with dual control boards (HSWA). This redundancy is critical for minimizing Mean Time To Repair (MTTR). If you need to reset or upgrade the active control board, the standby board can take over, ensuring uninterrupted service. This feature is part of the platform’s 99.999% uptime design . When performing a factory reset or major firmware upgrade, ensure the standby board is active to prevent a full network outage.

Q5: How do I configure the uplink ports after a factory reset to restore network connectivity?

Re-configuring uplink ports is mandatory to restore traffic flow to the core network. After a reset, you must set the speed, duplex, and auto-negotiation settings using the `set uplink port` command in the device context. For instance, to force a 1Gbps full-duplex connection on port 19:1, use: `set uplink port 19:1 auto_negotiation disable speed 1000m duplex full`. You must also recreate the management VLAN and IP to re-establish communication with the UNM2000 NMS or AdminOLT .

Q6: What is the maximum forwarding rate and MAC address table size of the EC8B board?

The EC8B EPON service board is designed for wire-speed forwarding, ensuring no performance bottlenecks. It supports a maximum forwarding rate of wire-speed packet forwarding and a MAC address table size of 32k entries . This capacity makes the AN5516 series suitable for high-density ISP environments where thousands of ONUs are connected. When procuring, ensure your traffic load does not exceed the 32k MAC limit to maintain performance.

Q7: What should I do if the ALM (Alarm) LED is red on my GC4B board after a reset?

A red ALM indicator on the GC4B board typically signifies that the card is resetting, has an active alarm, or has failed to establish a communication link with the active control board . This is common after a factory reset. If the red light persists after boot-up, it indicates the board has not been properly authorized or initialized. You must check the card status using the `showcard` command and re-authorize the slot if necessary .

Q8: Can I manage the FiberHome AN5516 via SNMP after a reset?

Yes, the AN5516 supports SNMP management for network monitoring and integration with external systems like AdminOLT . Post-reset, you must reconfigure the SNMP community strings (Read and Read/Write) and ensure the management VLAN and IP are correctly set. The default SNMP ports are often configurable (e.g., 3161). Re-establishing SNMP access is crucial for integrating the OLT into your existing NOC monitoring tools .