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ER605 DNS slowness

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ER605 DNS slowness

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
ER605 DNS slowness
ER605 DNS slowness
2022-08-01 18:55:38
Model: ER605 (TL-R605)  
Hardware Version: V1
Firmware Version: 1.2.1 Build 20220512 Rel.76748

As reported by others, seeing extreme delays when using ER605 for DNS. even hardcoded the ER's DNS servers to 1.1.1.1 and 8.8.8.8, no change.

 

If I hardcode my clients to use external DNS servers directly, I do not see this problem.  I've tried to set the DHCP scope to only use external servers, but it still inserts the routers' IP as the first DNS server.

 

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4 Reply
Re:ER605 DNS slowness
2022-08-02 09:12:23

  @SWS 

 

Generally speaking, the DNS for devices within the LAN is the router by default, and the DNS for the WAN port is the default gateway for the router.

Which DNS are you specifically referring to that has delay issues?

Just striving to develop myself while helping others.
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Re:ER605 DNS slowness
2022-08-02 14:15:06 - last edited 2022-08-02 15:02:08

  @Virgo 

When any of my clients behind the 605 get DHCP, the first DNS server they get is the ER605 itself, even when I have the scope set to use only external servers. Some sites resolve quickly, others take upwards of 10 seconds.   If I hardcode DNS on the clients to only use external DNS servers, this doesn't happen.

 

 

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#3
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Re:ER605 DNS slowness
2022-08-03 10:03:24

Dear @SWS ,

 

SWS wrote

  @Virgo 

When any of my clients behind the 605 get DHCP, the first DNS server they get is the ER605 itself, even when I have the scope set to use only external servers. Some sites resolve quickly, others take upwards of 10 seconds.   If I hardcode DNS on the clients to only use external DNS servers, this doesn't happen.

 

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

 

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 TKID220803294, please check your email box and ensure the support email is well received. Thanks!

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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Re:ER605 DNS slowness
2022-08-04 06:34:44

  @SWS 

Yeah I have the same issue with the deployed ER605s v1 i have.

 

I set in the LAN DHCP config that first DNS server is the the ISPs dns or 1.1.1.1.

 

The ER605 v2 in my testing only adds a few ms delay to DNS queries, which is promising.

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#5
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