Wifi connection problems on GL-MT300n-v2

marass · 2021-06-03T15:12:58.757Z

Hi,
I have a problem with my new GL-MT300N-v2 Mango. I have on my normal AP two Wifi networks: 1 unsecured and 1 WPA2 Personal/AES. I can see with iwconfig on my “Mango” that it is connected (tested with both) but I get no IP and on my APs I see the “Mango” as connected but without IP.
When I open a hotspot on my iPhone and try to connect with it, it works without any problems.
I even tried to disable the Wifi for clients on the “Mango” without any effect. What can I do to further debug? Can I check anything on CLI? I have the newest firmware installed. I reset the “Mango” different times. Has anyone similar experience?
EDIT: other devices can connect to both of my Wifi networks
Thank you.
Best regards
Marcus

marass · 2021-06-03T20:16:42.100Z

Ok I found out it is related to my used TP-Link Omada APs. All other APs are working. So I think I have here a special configuration on my APs and need help to debug it. So if you have any ideas how I can find a way to debug this please let me know.

alzhao · 2021-06-04T10:30:46.451Z

Can you give details of your wifi settings on the ap that Mango cannot get IP?

marass · 2021-06-04T11:00:45.343Z

Hi @alzhao,
I have problems with my TP-Link EAP-225 controlled via Omada. These APs have a central configuration:

2 SSIDs both 2.4Ghz and 5Ghz
all rates are allowed
1 SSID has WPA2-PSK with AES
1 SSID is open
both SSIDs have the same problem

With tcpdump I can see that the udhcpc requests are send and reach my dhcp server. The DHCP server sends a reply but that reply never reaches the Mango. Are these information enough or did I miss anything? Please let me know.

marass · 2021-06-04T14:13:25.705Z

Hi @alzhao
here are screenshots from the two ssids and their configuration.
WPA2 SSID

Screenshot 2021-06-04 at 16.02.06639×554 27.6 KB

Open SSID
Screenshot 2021-06-04 at 16.03.03

alzhao · 2021-06-07T10:39:24.913Z

Does the psk2 and open wifi has the same SSID? or different?

marass · 2021-06-07T11:29:10.439Z

These are two different SSIDs.

JerryZhao · 2021-06-07T11:52:36.535Z

Please provide the captured file.

tcpdump udp -i apcli0 -w test.pcap

marass · 2021-06-07T19:23:03.790Z

Hi @JerryZhao here is a test file. If you need more or other information please let me know.
test.pcap.zip (374 Bytes)

JerryZhao · 2021-06-08T01:51:33.977Z

Please dump eth0

tcpdump udp -i eth0 -w test.pcap

marass · 2021-06-08T20:11:04.551Z

JerryZhao:

tcpdump udp -i eth0 -w test.pcap

root@GL-MT300N-V2:~# tcpdump udp -i eth0 -w test-udp.pcap

tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes

0 packets captured

0 packets received by filter

0 packets dropped by kernel

This is the output after one minute.
I ran also a tcpdump without “udp” this is test-all.pcap. I hope that helps you.
Archiv.zip (1.1 KB)

JerryZhao · 2021-06-09T02:22:04.302Z

I hope you can dump a normal packets with your other device.

marass · 2021-06-09T05:11:31.609Z

As I mentioned before on these two problematic SSIDs on my EAP-225 APs I can only send packages but I receive none. This is what we see here.
What should I simulate to get the result you want try to curl an url?

marass · 2021-06-10T05:29:30.379Z

Should I send you a dump file where you can see that the DHCP requests where answered on my DHCP server and the answers are send back? As a proof?

JerryZhao · 2021-06-10T07:18:26.217Z

Please show:
# ifstatus wwan

marass · 2021-06-10T15:34:03.337Z

root@GL-MT300N-V2:~# ifstatus wwan
{
“up”: false,
“pending”: true,
“available”: true,
“autostart”: true,
“dynamic”: false,
“proto”: “dhcp”,
“device”: “apcli0”,
“data”: {

}

Screenshot 2021-06-10 at 17.44.59923×69 8.5 KB

This is what my Omada Controller tells me at the same time.

marass · 2021-06-24T09:03:51.933Z

Can I help with more details or did another tests @JerryZhao ?

JerryZhao · 2021-06-24T09:21:24.361Z

iwinfo apcli0 i

And show me some log:

logread

JerryZhao · 2021-06-25T06:35:10.281Z

Please show me the firewall config

cat /etc/config/firewall

marass · 2021-06-25T18:37:46.845Z

Hi @JerryZhao,

I put the output of the requested commands in a txt file for you.
output.txt.zip (2.0 KB)