Guest User!

You are not Sophos Staff.

Thread Info
  • State Suggested Answer
  • +2 person also asked this people also asked this
  • Locked Locked
  • Replies 9 replies
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 24677 views
  • Users 0 members are here
Options
Suggested
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

DHCP over WiFi with Bridge to AP LAN

JonMiley

Hi, I have searched but was not able to locate the answer, so hopefully the community can assist.

I am configuring a new multi-site configuration.  I have a XG-115 at the home base and a XG-85w at the remote site.  Both sites have a Public and Private WiFi.  The Private is Bridged to the LAN and the Public has a separate IP scope.

The issue I am having is the Remote (XG-85w) site I cannot get a DHCP address when connected to the Private WiFi.  Wired, it parses out addresses.  But the wired connections all receive self-assigned addresses.  The Home (XG-115) site has the same exact configuration (Different names and different sub-nets) and has no issues whatsoever. 

I am stumped.  I Wiped and rebuilt the Remote from scratch just to make sure I hadn't fat-fingered something.  But I am not having any luck.



This thread was automatically locked due to age.
Parents
  • 0

    HI JonMiley , 

    I would like to help you with your issue.  Before that, I would require some more information on your  network and may need some logs to analyze,

     1. Before the implantation , Do you have any other DHCP server in the LAN network in Remote location ?

    2. Could you verify the XG appliance receiving the DHCP query  , you may use the command on the console,  "console > tcpdump 'port 67 or port 68  -e".

    3. On your local system , I would need a PCAP of the DHCP request and monitor on Port 67 and 68. 

    4. Network Layout and the MAC address of the system initiating the request and the host address of the XG Lan interface.

    Please message me the necessary information.

    Thanks and Regards

    Aditya Patel | Network and Security engineer.

  • 0 in reply to Aditya Patel

    Aditya,

    Thanks for the response, however I decided to go an alternate route with the Internal WiFi, so there are no logs available.

  • 0 in reply to JonMiley

    Bump on this issue, as i'm experiencing the same thing.  main site is working fine, but my remote site I using an XG 85W.  In Bridge to AP LAN mode, the private wireless network can't get dhcp addresses.

     

    We are using our windows server for DHCP in this case.  I think it should work, because I'm doing this same thing at my main location using an XG210 with several APs scattered about the building. 

     

    the only differences I can find are the model of XG box and the fact that the 85W has integrated AP rather than the externals at our main site.

  • 0 in reply to ZaneDonaldson

    Hi,

    I'm having the same issue, can't get DHCP for my wireless users. I'm using 105w.

Reply Children
  • 0 in reply to John Henry Vindas Carballo

    Here is a workaround configuration:

     

    on the wireless network, I am using Separate Zone and choosing the LAN zone. Obviously, the interface that is created will need an IP address, for example: 192.168.1.1

    Next, on my windows dhcp server, I am creating a dhcp scope that corresponds to the network range used by this new interface, for example 192.168.1.2-50

    Last, on the XG under DHCP, create a relay, choose the new wireless interface and point it to the windows dhcp server.

     

    it feels like a very janky solution. Also, for me I know the Bridge to Lan setting should work because my larger XG box is doing it just fine...but I'll take what I can get.

     

    Hope this helps

  • 0 in reply to ZaneDonaldson

    Hi Zane,

    Thank you for sharing your workaround but in my case, I can't modify the configuration of the DHCP server.