Detected ARP Conflict on TL-ER605

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Detected ARP Conflict on TL-ER605

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Detected ARP Conflict on TL-ER605
Detected ARP Conflict on TL-ER605
2023-02-15 02:39:45
Model: ER605 (TL-R605)  
Hardware Version: V1
Firmware Version: 1.1.1 Build 20210723 Rel.64608

Hi Support

 

Good day,

 

Please help me with my concern. What does this means,

 

Module: Firewall  |  Level: NOTICE  |  Content: "detected ARP conflict and dropped 1 packets."

Module: DHCP Server  |  Level: NOTICE  |  Content: "DHCP Server allocated IP address 10.30.0.x

 

Device used:

TL-ER605 -             IP: 10.30.0.1 , MAC: C0-06-C3-A8-07-C3

TP-Link AC1200 -   IP: 10.30.0.4 , MAC: 10-27-F5-EB-F5-EA  -  ACCESS POINT

TL-WA855RE -       IP:10.30.0.3 , MAC: B2-A7-B9-0C-43-D1  -   WI-FI EXTENDER

 

 

Before I have no problem with this running for almost less than 2yrs then suddenly I found out that there is an error in system log, because we encountered no internet connection almost all of the workstation.

 

Also, we encountered no internet connection on Wi-Fi even the mobile device is connected (especially on Facebook Messenger: Waiting for Network status)

 

Please see picture below as your reference

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thank you

Ken

File:
backup-ER605-2023-02-15.rarDownload
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#1
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7 Reply
Re:Detected ARP Conflict on TL-ER605
2023-02-15 05:58:13

  @ken22 

 

here is another screen shot 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thank you

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#2
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Re:Detected ARP Conflict on TL-ER605
2023-02-15 09:32:21

Dear @ken22

 

Thank you so much for taking the time to report the issue to our community!

There is a solution post here which is related to your issue, please check it and install the new firmware to try.

 

If it doesn't help, please tell us whether it happens after firmware upgraded?

How many clients totally in your network?

Did you set any DHCP Reservation for them?

Best Regards! >> Omada EAP Firmware Trial Available Here << >> Get the Latest Omada SDN Controller Releases Here << *Try filtering posts on each forum by Label of [Early Access]*
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#3
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Re:Detected ARP Conflict on TL-ER605
2023-02-16 01:57:51

Hi  @Hank21 

 

Good day,

 

Successful Firmware Upgraded using ER605(UN)_v1_1.2.2_Build 20230208 (Beta).  Please see bin file attached.

 

After upgrading, still encountering the same issue at system log.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

How many clients totally in your network? - We have almost 30 clients

 

Did you set any DHCP Reservation for them? - Yes, also using IP MAC-Binding to set a dedicated IP on specific client. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thank you

ken

 

 

 

 

File:
backup-ER605-2023-02-16.rarDownload
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#4
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Re:Detected ARP Conflict on TL-ER605
2023-02-17 05:13:21

Dear @ken22 ,

 

Thanks for your detailed answer.

 

Does this error message still affect the actual usage of ER605 now?

Is DHCP Reservation working properly?

Best Regards! >> Omada EAP Firmware Trial Available Here << >> Get the Latest Omada SDN Controller Releases Here << *Try filtering posts on each forum by Label of [Early Access]*
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#5
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Re:Detected ARP Conflict on TL-ER605
2023-02-17 06:45:17

Hi @Hank21 

 

Good day,

 

Does this error message still affect the actual usage of ER605 now? Yes, still displayed

"detected suspected ARP attack packets"

"DHCP server received decline client 10.30.0.x. IP address xx.xx.xx.xx.xx.xx"

"detected ARP conflict and dropped 1packets"

 

Is DHCP Reservation working properly? not sure, because I encountered an duplicate IP on the network.

 

Can you give the stable solution for this concern

 

thank you

ken

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#6
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Re:Detected ARP Conflict on TL-ER605
2023-02-17 07:09:44

Dear @ken22

 

To better assist you, I've created a support ticket via your registered email address, and escalated it to our support engineer to look into the issue.

The ticket ID is TKID230228471, please check your email box and ensure the support email is well received. Thanks!

Once the issue is addressed or resolved, welcome to update this topic thread with your solution to help others who may encounter the same issue as you did.

 

Many thanks for your great cooperation and patience!

Best Regards! >> Omada EAP Firmware Trial Available Here << >> Get the Latest Omada SDN Controller Releases Here << *Try filtering posts on each forum by Label of [Early Access]*
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#8
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Re:Detected ARP Conflict on TL-ER605
2023-05-24 15:52:15

Hi Support

TPLINK ER605 error keeps reporting arp package conflict even though it has been carefully checked, but the message still exists and occurs from the old firmware version to the latest ER605(UN)_V1_1.3.0 Build 20230511 still occurs
With the same configuration, when powering off and reopening, there is no error message, and when rebooting, an arp conflict error message occurs ????????

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#9
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