@Kevin_Z 

Will test & report tomorrow. 
But as per reports it seems to be working now.

Thanks TP-Link engineers.

Looking forward to stable version at the earliest.

Regards,

  @Kevin_Z  My XX530V firmware version  0.7.0 , got bsnl ftth new connection and using it for week, facing EPON Registering issue when modem resumes from powercut after power resume XX530V indefinetly in EPON Registering issue loop, even tp link GUI level reboot also not rectifying EPON Registering issue, only if i perform manual power OFF & ON via modem power button then modem automatically getting EPON Registration success

Hello  @Kevin_Z and team,

I have tested the pre-release firmware 0.9.0 3.0.0 Build 251126 on the XX530v V1 and compared it with 0.7.0 3.0.0 Build 250606, focusing on IPv6 Router Advertisement (RA) behavior and Lifetime configuration. Below is a comprehensive report with all observed behaviors, regressions, and critical issues.

Device and Test Environment

• Hardware: XX530v v1.0

• Test Client: Raspberry Pi Zero 2 W, DietPi (Debian-based)

• Interface: wlan0

• Tool Used: rdisc6 (from ndisc6 package)

• Command: rdisc6 wlan0

• IPv6 Configuration: Address Type: RADVD via RA

• Settings Tested:

1. Advanced > LAN Settings > IPv6 (Lifetime Value)
2. Advanced > Security > Access Control (ON/OFF / Allowlist / Deny list)

1. Lifetime Handling

Key Observations:

• 0.9.0 regresses prefix lifetime handling: Configured prefix valid/preferred lifetimes are ignored (fixed at 300s).

• Router lifetime miscalculation: Large values are applied incorrectly in 0.9.0 (~20864s vs 86400s).

• Route lifetime remains statically 30s in all firmware versions.

• DNS lifetime is unusually low (10s in 0.7.0; 900s in 0.9.0), which may affect Address Type: RADVD reliability.

• Persistence: Configured lifetime in 0.9.0 does not persist after reboot (resets to 1800s).

2. RA Duplication and ACL Behavior

Observation:

• When ACL Allowlist is ON in 0.9.0, RA messages are suppressed, causing Address Type: RADVD to fail and clients to lose IPv6 connectivity.

• RA duplication (seen when ACL is OFF) appears to be keeping IPv6 connectivity alive, but this is non-standard and unreliable.

• ACL OFF or ACL ON with Deny list allows normal IPv6 operation.

3. Comparative Analysis

4. Expected Behavior

1. Configured Lifetime Value should persist after a reboot.

2. Router lifetime should scale accurately with the configured value.

3. Prefix valid/preferred lifetimes should match configured values.

4. Route and DNS lifetimes should be reasonable relative to configured values.

5. RA messages should always be advertised to clients, independent of ACL allowlist/deny list settings.

6. RA duplication should be eliminated.

5. Impact & Recommendations

Impact:

1. Instability: Rapid IPv6 address expiration (300s prefix) leads to frequent Address Type: RADVD renewals.

2. Connectivity Failure: ACL allowlist prevents clients from maintaining a public IPv6 address.

3. Manual Overhead: Reconfiguration is required after every reboot due to the lifetime reset.
    

Recommendations:

1. Fix prefix lifetime regression in 0.9.0.

2. Apply router lifetime correctly for all configured values.

3. Ensure RA messages are advertised even when ACL Allowlist is enabled.

4. Make configured lifetime persistent across reboots.

6. Additional Feedback & Feature Requests

In addition to the bug reports detailed above, I would also like to direct the engineering team's attention to my previous comment, which contains several suggestions for feature additions that would greatly improve this firmware:

https://community.tp-link.com/en/home/forum/topic/839982?replyId=1642906

Conclusion

Firmware 0.7.0 partially corrects prefix lifetime behavior but still has short route/DNS lifetimes. Firmware 0.9.0 introduces significant regressions regarding prefix lifetimes, value persistence, and a critical bug where the ACL Allowlist suppresses RA messages entirely.