DHCP issue with ORBI RBK50 configured in AP mode

Master

Jan 03, 2019

Nicolas72 wrote:

Hi,

Thank you for your reply!

When configuring AP mode I selected the first option "Get dynamically from existing router".

Orbi as an AP did recieve an IP from the fronted switch (acting as a DHCP server). The IP recieved from the switch is in the good range.

It means the communication between Orbi and the switch is working well.

My wireless connected devices sometime receive an IP in the same and good range but most of the time recieve an IP from the "default range" 169.254.X.X with no gateway and an incorrect network mask which correspond to no connectivity ...

Of course, everything goes well If my wireless devices recived a good network address configuration and vice versa.

Strange behaviour knowing that my previous Apple Extreme worked fine in the same topology and configuration during 5 - 6 years.

Best Regards.

The only thing that I can think of now is: When you changed from the Apple Airport to Orbi, did you use the same SSID? I'm afraid that your devices still have the routing information that it got when it initially attached through the Apple Aiport which I'm not sure if it will be correct to use with Orbi.

Does forgrtting the network from the device and attaching again help? Otherwise a change of the SSID woths also trying!

Nicolas72
Guide
Jan 04, 2019
Hi,

Yes I keep the same SSID but I forgot the network on wireless devices and reconnected. I aso tried to change the SSID and I also restarted the AP.

Still the same issue.

I discovered some strange behaviour yesterday evening. One of my wireless device sucessfuly connected to the network and it apparently received an IP from an already connected wired device (when I came to my wired device I saw the error "An other device use your IP address".

It never happened while runing my old Airprt. I am not sure but it's like getting an IP via DHCP from Orbi AP was not the same as getting an IP via the same DHCP from a wired connection (like the AP is also acting as a DHCP).

I guess I'm right if I say turning Orbi into AP mode disable its DHCP feature?

Best Regards
- ekhalil
  Master
  Jan 04, 2019
  Nicolas72 wrote:
  
  ..........
  I guess I'm right if I say turning Orbi into AP mode disable its DHCP feature?
  
  ........
  
  Yes, once Orbi is on AP Mode the DHCP functionality should be diasabled.
  
  Nicolas72 wrote:
  
  .......
  I discovered some strange behaviour yesterday evening. One of my wireless device sucessfuly connected to the network and it apparently received an IP from an already connected wired device (when I came to my wired device I saw the error "An other device use your IP address".
  
  .....
  
  Do you have any extenders/repeaters or Wifi-LAN converters? Those devices have built-in DHCP servers and I noticed that sometimes they can interfere with the main DHCP server.
  
  Please get the following information that will give us information about the configuration in Orbi:
  
  From a browser go to the router's debug page (http://192.168.1.1/debug.htm). Use your router's IP address
  
  Enter admin as user name and your router’s management password
  
  Tick "Enable Telnet" option
  
  Use Telnet to connect to your Router telnet 192.168.1.1 (use your router's IP address) and enter admin and the same password as above
  
  Enter the following commands, and copy the output printout:
  
  config get lan_dhcp
  
  config get lan_proto
  
  config get ap_dhcp_ipaddr
  
  config get ap_dhcp_gateway
  
  config get ap_dhcp_netmask
  
  config get bridge_dhcp_ipaddr
  
  config get bridge_dhcp_gateway
  
  config get wan_proto
  
  config get wan_dhcp_gateway
  
  config get wan_dhcp_server
  
  config get config get bridge_dhcp_netmask
  - Nicolas72
    Guide
    Jan 04, 2019
    Nope no extenders, repeaters or anything else ...
    
    here is the debug log
    
    root@RBR50:/# config get lan_dhcp
    
    1
    
    root@RBR50:/# config get lan_proto
    
    dhcp
    
    root@RBR50:/# config get ap_dhcp_ipaddr
    
    192.168.0.25
    
    root@RBR50:/# config get ap_dhcp_gateway
    
    192.168.0.1
    
    root@RBR50:/# config get ap_dhcp_netmask
    
    255.255.255.0
    
    root@RBR50:/# config get bridge_dhcp_ipaddr
    
    0.0.0.0
    
    root@RBR50:/# config get bridge_dhcp_gateway
    
    0.0.0.0
    
    root@RBR50:/# config get wan_proto
    
    dhcp
    
    root@RBR50:/# config get wan_dhcp_gateway
    
    192.168.0.1
    
    root@RBR50:/# config get wan_dhcp_server
    
    192.168.0.1
    
    For those wireless moblle devices such as iPhone or iPad who can get connected I noticed very unstable behavior (good throughput for 5 minutes to very low throughput without moving, connection drop after some minutes or hours). Sometime when trying to reconnect I got errors such as 'incorrect WIFI password'. Waiting 5 minutes and reconnecting solved this issue without retyping the password but it reapears from time to time.
    
    I made the count, I have 26 devices to connect (IP camera, Sonos, Hue bridge, Amazon echo and multiple dots, Apple devices, ...
    
    The most frequent issues occurs with Apple devices (2 x iPhone, 2 x iPad).
    
    Do you run the same last firmware?
    
    Do you have some Apple device connected to your Orbi?
    
    Not convinced by Orbi so far to be honest ...

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DHCP issue with ORBI RBK50 configured in AP mode