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GS110TPv3 incompatible with Ubiquiti Unifi UAP-AC-M
Hi everyone,
I'm faced with an issue between the devices GS110TPv3 and Unifi UAP-AC-M. On the UAP-AC-M I have two SSIDs:
MAIN -> This SSID is using untagged network communication
SECOND -> This SSID is using VLAN-ID 100
The UAP-AC-M is powered by the switch.
The untagged network uses default "VLAN" 1. The GS110TP is connected to an GS750E where also the DHCP Server (Unifi USG) is connected to.
UAP-AC-M <-> GS110TP <-> GS750E <-> USG
When I connect to the MAIN SSID, the Client doesn't get an IP from DHCP (stuck while obtaining IP). Also when I set static IP to the Client, I don't have any Network access! This is my issue.
But when I connect via SECOND SSID, I will get an IP from DHCP and can connect to the network without any issues.
I have checked a hundred times that the Ports are well configured (VLAN 1 is untagged, VLAN 100 is tagged from end-to-end).
When I wireshark the Port where the UAP-AC-M is connected, I see that the broadcast for DHCP request is coming from the device - but will never get an response.
When I wireshark the Port which is connected to the GS750E, I see that there will never receive the DHCP-broadcasts!
But I see also, that this communication when connecting to the SECOND, tagged SSID will go through both interfaces!
Because also with static IP I will have no network access via MAIN SSID, also other untagged traffic is not managed by the switch.
I don't know why packets are getting "lost" within the switch. I disabled all advanced features like DHCP snooping etc. So it should be a stupid switch with VLAN.
Do you have any idea. I am working on this issue since days and come to an dead-end.
Just to be sure - I have tested several UAP-AC-M and the issue looks like the same on every device! When I connect the UAP-AC-M directly to the GS750E (with PoE injector because of missing PoE in this switch) everything works well without any issues!
Thanks for your help. Hopefully we will get a solution because if this is a really incompatibility I don't know how to get official support.
Re: GS110TPv3 incompatible with Ubiquiti Unifi UAP-AC-M
Show the VLAN and VLAN port config for both switches, for both the trunk connection and the trunk-like connection to the APs. There must be something wrong on that level.
Attached the screenshot from Switches with hints on which port the devices are connected . I checked it a hundred times, but maybe I misunderstood something.
Re: GS110TPv3 incompatible with Ubiquiti Unifi UAP-AC-M
Dear Kurt,
thanks for your answer.
On one hand I'm glad that it seems to be not my fault. On the other hand, I don't know how to solve the issue without netgear support.
I also tried other ports with the UAC-AP-M on GS110TP but same result. The untagged packets are not "forwarded" to the trunk port.
Yes, it's the current firmware. But it was same issue with old ones. I will reset the device tomorrow and try it again.
When this will be without success, do you know how I can proceed?
On GS750E I had an issue between the switch an the guest-port with FritzBox. Therefore the support found an issue in firmware (but this was within the 90days "professional support". Now next issue on next switch. It is getting annoying 😞
As I setup the LAG-Trunk between two Ports from GS750E and GS110TP the issue is back.
As I reseted the switch and reconfigred it, I did not setup the LAG. With this setup I thought the issue was gone, but now I just additionally setup the LAG - and the issue is back.
Broadcast from untagged VLAN-ID is not routed through LAG.
Re: GS110TPv3 incompatible with Ubiquiti Unifi UAP-AC-M
I was analyzing the issue again. And hopefully I found the reason why.
When I activate the LAG in GS1110TP, the VLAN-configuration for the involved Trunk-Ports is not cleared for "the single Ports".
This means, that in my example the Port g1 and g2 had - also after putting these prots to LAG - VLAN1 as untagged. Also the LAG of these Ports had VLAN1 as untagged.
I removed any VLAN relationship to the "single Ports" because they are getting it from the related LAG!
My other switch from netgear is removing this by default when activating an LAG.
After that I made a reboot and cleared the address table.
When I activate the LAG in GS1110TP, the VLAN-configuration for the involved Trunk-Ports is not cleared for "the single Ports".
This means, that in my example the Port g1 and g2 had - also after putting these prots to LAG - VLAN1 as untagged. Also the LAG of these Ports had VLAN1 as untagged. I removed any VLAN relationship to the "single Ports" because they are getting it from the related LAG!
This is correct - the LAG-port VLAN membership must be set to [ ] unassigned on the Smrt Managed Pro switches.
