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ER8411 : updating NAT rules crashes the network

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ER8411 : updating NAT rules crashes the network

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ER8411 : updating NAT rules crashes the network
ER8411 : updating NAT rules crashes the network
2024-09-09 10:45:02 - last edited 2024-09-11 01:37:26
Tags: #NAT #Network Connectivity
Model: ER8411  
Hardware Version: V1
Firmware Version: 1.2.1

Hello,

 

I've recently deployed Omada in production for a testing site, ahead of a deployment nation-wide to 14 branches + HQ.

We use an ER8411 controlled by an OC300.

 

My colleagues have been complaining and for a good reason : any time I update a NAT rule, the whole network seems to crash and they get disconnected from Internet for approximately 10 to 20 seconds. We've never experienced this with any other router before.

 

I can't imagine this happening when we deploy it in our HQ, cutting down Internet to 150 people, servers, storage, etc...

 

Should I know that the same behavior will happen during other configuration process ?

Will it ever be fixed or is this "by design" ?

 

Thanks ahead.

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#1
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2 Accepted Solutions
Re:ER8411 : updating NAT rules crashes the network-Solution
2024-09-11 01:37:22 - last edited 2024-09-11 01:37:26

Hi @Dipsy 

Thanks for posting in our business forum.
When you modify the settings, the NAT service will re-run. The created session will be disconnected. The web you feel nothing may re-create the session automatically.

Such a service rerun will affect the real-time services the most.

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#4
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Re:ER8411 : updating NAT rules crashes the network-Solution
2024-09-11 08:54:13 - last edited 2024-09-11 08:54:17

Hi @Dipsy

As I just consulted with the dev, this one will be considered as a logic optimization in the future firmware update.

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#5
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5 Reply
Re:ER8411 : updating NAT rules crashes the network
2024-09-09 14:20:59

Updates :

I've done more tests and the actual Internet connection doesn't get really taken down. For example VoIP still works, ping works fine for LAN and WAN, but web navigation is broken. My theory now is that NAT rules updates are causing the DNS proxy service to reboot, somehow ? I'll try to disable the DNS Proxy and check if the downtime happens.

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#2
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Re:ER8411 : updating NAT rules crashes the network
2024-09-09 15:51:42

Updates :

Still happening without the DNS Proxy and DNS Cache.

 

I'm having a hard time understanding the problem :

  • If I ping an IP before the downtime, the ping keeps working during the downtime. But I can't access a related website.
  • But if I start the same ping during the downtime, it fails.

 

Seems like "ongoing" connections works, but not new ones.

 

Any ideas or explanations on why ?

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#3
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Re:ER8411 : updating NAT rules crashes the network-Solution
2024-09-11 01:37:22 - last edited 2024-09-11 01:37:26

Hi @Dipsy 

Thanks for posting in our business forum.
When you modify the settings, the NAT service will re-run. The created session will be disconnected. The web you feel nothing may re-create the session automatically.

Such a service rerun will affect the real-time services the most.

Recommended Solution
  1  
  1  
#4
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Re:ER8411 : updating NAT rules crashes the network-Solution
2024-09-11 08:54:13 - last edited 2024-09-11 08:54:17

Hi @Dipsy

As I just consulted with the dev, this one will be considered as a logic optimization in the future firmware update.

Recommended Solution
  1  
  1  
#5
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Re:ER8411 : updating NAT rules crashes the network
2024-12-16 08:09:49

Hello,

 

Problem still happening.

But now we are live with ~200 administrative users, so big issue.

 

We had no issue with the 10+ years old WatchGuard we used to run ; it's really troubling that such a big issue still exists for Omada. 

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#6
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