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EAP 225 firmware 2.6.0 issue with DHCP ACK

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EAP 225 firmware 2.6.0 issue with DHCP ACK

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EAP 225 firmware 2.6.0 issue with DHCP ACK
EAP 225 firmware 2.6.0 issue with DHCP ACK
2019-10-11 08:47:22 - last edited 2019-10-11 08:48:27
Model: EAP225  
Hardware Version: V3
Firmware Version: 2.6.0 20190726

I upgraded from 2.4.0 to 2.6.0 on the EAP via omada controller on linux.

 

After the upgrade, several  clients connecting to the EAP 225  on the omada controller would only show IP addresses of 255.255.255.255.

Other clients connecting to the 3 x EAP245s had no issues.

 

I then checked the DHCP server, and it was receiving loads of DHCP DISCOVER and DHCP OFFERS, but no DHCP ACK

 

I then downgraded back to 2.4.0 and all the issues went away.

 

Anyone else had issues with that?

 

 

 

 

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#1
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6 Reply
Re:EAP 225 firmware 2.6.0 issue with DHCP ACK
2019-10-11 10:19:45

 

Waga wrote

I then checked the DHCP server, and it was receiving loads of DHCP DISCOVER and DHCP OFFERS, but no DHCP ACK

 

I then downgraded back to 2.4.0 and all the issues went away.

 

Anyone else had issues with that?

 

No problems here with several sites. But note that the new firmware fixed a problem with untagged/tagged frames. Are you using multi-SSIDs with VLAN and a default VLAN?

 

Could it be that DHCPOFFERS from the DHCP server are not answered with DHCPREQUESTS from clients?

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#2
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Re:EAP 225 firmware 2.6.0 issue with DHCP ACK
2019-10-11 10:46:48

@R1D2 yes to all (multi-vlan w/default and multi-ssid)

It could be that the DHCP OFFERS are responded to , but the clients not responding.

 

Thanks for the input! Looks like the situation with me is that the powerline adapter I am using is the culprit (tagged vlan traffic being dropped) back to a managed switch.

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#3
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Re:EAP 225 firmware 2.6.0 issue with DHCP ACK
2019-10-11 10:56:03

@Waga Try to disable vlan on ssid with untagged vlan.

 

 

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#4
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Re:EAP 225 firmware 2.6.0 issue with DHCP ACK
2019-10-11 11:08:32

@shberge I was just about to do that!

 

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#5
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Re:EAP 225 firmware 2.6.0 issue with DHCP ACK
2019-10-11 12:06:32 - last edited 2019-10-11 12:08:39

 

Waga wrote

yes to all (multi-vlan w/default and multi-ssid)

 

The EAP firmware bug fix is for untagged frames (default VLAN!), which have been errorneously sent to VLAN-tagged SSIDs before.

 

So if you exchange the switch by a managed one, ensure that every SSID using VLANs can pass DHCPOFFERS from the DHCP server to the clients.

 

Personally, I don't mix tagged and untagged traffic, but this is just our policy here, not justified by technical reason. Anyway, each separate VLAN needs access to the DHCP server, either by separate server instances in each VLAN or by using a DHCP relay. 

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#6
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Re:EAP 225 firmware 2.6.0 issue with DHCP ACK
2019-10-11 12:45:55

@R1D2 Yeah I know. I don't generally mix them at work, but this is at home.

 

I didn't twig that the EoP adapters were non 8021qs. I do have managed (5 x HP procurves 2810s etc) which are obv all 802.1q, but just the devolos aren't

 

Anyway, thanks for the dbugging assist.

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#7
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