Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    1 vlan over 2 switches

    Scheduled Pinned Locked Moved L2/Switching/VLANs
    31 Posts 4 Posters 2.6k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • M
      michael178212
      last edited by

      aps dont support vlans but both switches do. Just trying to extend wifi coverage and have both aps in the same subnet so get the same ip which ever ap I connect to.

      Upstairs switch is a netgear GS308E
      Downstairs is a netgear GS108Ev3
      Both aps are just bt homehub routers with dhcp turned off.

      Both support vlans.

      Only other vlan that I got is a vlan for unraid as I found it was easier to stick it on a seperate subnet with me the only person that can access it.

      vlan

      Ports 1 are tagged and used as trunk between both switches
      Port 2 is tagged and goes into pfsense
      Port 7 is to unraid
      Ports 8 are to the aps

      Hope this helps

      JKnottJ 1 Reply Last reply Reply Quote 0
      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        @michael178212 said in 1 vlan over 2 switches:

        Ports 8 are to the aps

        And the only vlan you have on those ports is the vlan 2.. You have to remove any other Untagged vlans from those ports if you want your AP to just be vlan 2

        An intelligent man is sometimes forced to be drunk to spend time with his fools
        If you get confused: Listen to the Music Play
        Please don't Chat/PM me for help, unless mod related
        SG-4860 24.11 | Lab VMs 2.8, 24.11

        JKnottJ 1 Reply Last reply Reply Quote 0
        • JKnottJ
          JKnott @michael178212
          last edited by

          @michael178212 said in 1 vlan over 2 switches:

          aps dont support vlans

          Real APs do. However, in your case, you'll need to configure an access port on the switch, configured for the appropriate VLAN, which you will connect your "AP" to. You will not be able to support multiple SSIDs.

          Configuring an AP for multiple SSIDs is quite common. For example, many businesses have SSIDs for employees and guests. The employee SSID connects to the company network, but guests can only connect to the Internet.

          PfSense running on Qotom mini PC
          i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
          UniFi AC-Lite access point

          I haven't lost my mind. It's around here...somewhere...

          1 Reply Last reply Reply Quote 0
          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by

            Yeah I run 4 SSIDs on my APs, all in different vlans.. 1 untagged, and 3 tagged.

            An intelligent man is sometimes forced to be drunk to spend time with his fools
            If you get confused: Listen to the Music Play
            Please don't Chat/PM me for help, unless mod related
            SG-4860 24.11 | Lab VMs 2.8, 24.11

            1 Reply Last reply Reply Quote 0
            • JKnottJ
              JKnott @johnpoz
              last edited by

              @johnpoz said in 1 vlan over 2 switches:

              And the only vlan you have on those ports is the vlan 2.

              I haven't tried it, but I'd expect any AP that doesn't support VLANs to just pass the tagged frames, which some devices could then be configured to use. This is no different than passing VLANs through a dumb switch. However, the proper way is to use an AP that supports VLANs and multiple SSIDs (avoid TP-Link).

              PfSense running on Qotom mini PC
              i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
              UniFi AC-Lite access point

              I haven't lost my mind. It's around here...somewhere...

              1 Reply Last reply Reply Quote 0
              • M
                michael178212
                last edited by

                So basically all I was trying to do was to have a single port on both switches dedicated to vlan2 and then give vlan2 internet access, So no matter what I plugged into either one of those dedicated ports i would have a subnet of 10.10.10.0/24 and have internet access

                So my thinking was if I can do that then surely I can then use 2 old bt homehub routers with their dhcp turned off and use their wifi signal to connect to and be on subnet of 10.10.10.0/24 as long as both ssids and passwords are the same.

                But if i need a ap that can handle vlans then I best get looking haha

                JKnottJ 1 Reply Last reply Reply Quote 0
                • johnpozJ
                  johnpoz LAYER 8 Global Moderator
                  last edited by johnpoz

                  No you don't need an AP that supports vlans.. To do what your wanting to do. If all the devices connecting to the wifi of this AP are going to be in 1 vlan, ie vlan 2.. They can be dumb as rocks and will work.

                  You are connecting them to this port via one of their lan ports right, not a wan port of the AP.. Using an old wifi router as just an accesspoint (that doesn't specifically support AP mode) means you turn off its dhcp server, give it an IP on the network your going to connect to, and then connect it to said network via one of its lan ports.

                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                  If you get confused: Listen to the Music Play
                  Please don't Chat/PM me for help, unless mod related
                  SG-4860 24.11 | Lab VMs 2.8, 24.11

                  1 Reply Last reply Reply Quote 0
                  • JKnottJ
                    JKnott @michael178212
                    last edited by

                    @michael178212 said in 1 vlan over 2 switches:

                    But if i need a ap that can handle vlans then I best get looking haha

                    As I mentioned, should you go that route, avoid TP-Link. Some of their gear doesn't work properly with VLANs. This applies to both APs and managed switches.

                    PfSense running on Qotom mini PC
                    i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                    UniFi AC-Lite access point

                    I haven't lost my mind. It's around here...somewhere...

                    1 Reply Last reply Reply Quote 0
                    • M
                      michael178212
                      last edited by

                      Thanks guys, got it all well sort of working now.

                      Both switches that I've assigned a port to vlan2 work so what gets plug into it is on vlan2 and has the subnet 10.10.10.1/24 which is what I wanted. Only problem I have which I find a tad weird is if i connect to the wifi ap downstairs first then I connect, if I walk upstairs then my phone connects to the wifi ap upstairs as i was hoping for and works but the weird part is if I'm upstairs and disconnect my phone from the wifi and then reconnect then I can't connect and dont get assigned an ip but If I go downstairs I can connect

                      As the vlan side of it is working the I'm Putting it down to the fact I'm using bt routers as aps and not proper aps.

                      1 Reply Last reply Reply Quote 0
                      • johnpozJ
                        johnpoz LAYER 8 Global Moderator
                        last edited by

                        Did you change the PVID of the ports that you moved to new vlan... You would hope the switch would auto do that, but you might have to change do it by hand... Make sure whatever vlan you put a port in that is untagged, that you change the pvid of that port to the vlan you assign untagged.

                        An intelligent man is sometimes forced to be drunk to spend time with his fools
                        If you get confused: Listen to the Music Play
                        Please don't Chat/PM me for help, unless mod related
                        SG-4860 24.11 | Lab VMs 2.8, 24.11

                        1 Reply Last reply Reply Quote 0
                        • M
                          michael178212
                          last edited by

                          vlans setup

                          Downstairs switch

                          port 1 is tagged ( trunk between both switchs )
                          Port 2 is tagged and goes to pfsense.
                          Port 8 is untagged, goes to the wifi
                          All other ports are left untagged

                          Upstairs switch

                          Port 1 is tagged ( trunk )
                          Port 8 is untagged and goes to wifi
                          Port 7 is untagged and is for unraid
                          All other ports are left untagged

                          Only ports that have a pvid are ports 8 on both switch which have are pvid 2 and port 7 of the upstairs switch which has a pvid of 20

                          If this helps

                          Downstairs switch

                          Port 1 - 2 - 8 are in vlan2. Ports 1 and 2 are tagged, port 8 untagged and has pvid2

                          Ports 1 and 2 are tagged and are in vlan20

                          Upstairs switch

                          Ports 1 and 8 are in vlan2 port 1 tagged and 8 untagged with 8 having pvid2

                          Ports 1 and 7 are in vlan20 with port 1 being tagged and 7 untagged and has pvid20

                          1 Reply Last reply Reply Quote 0
                          • johnpozJ
                            johnpoz LAYER 8 Global Moderator
                            last edited by

                            @michael178212 said in 1 vlan over 2 switches:

                            if I'm upstairs and disconnect my phone from the wifi and then reconnect then I can't connect and dont get assigned an ip

                            When you say can't connect - you mean you can not auth and connect to the wifi, or you actually connect to the wifi but just don't get an IP and end up with 169.254.x.x as your IP?

                            If you can not actually auth and associate to the wifi, then no you wouldn't get an IP.

                            An intelligent man is sometimes forced to be drunk to spend time with his fools
                            If you get confused: Listen to the Music Play
                            Please don't Chat/PM me for help, unless mod related
                            SG-4860 24.11 | Lab VMs 2.8, 24.11

                            1 Reply Last reply Reply Quote 0
                            • M
                              michael178212
                              last edited by

                              My phones tries to connect as it says connecting but just dosnt connect both passwords are the same and ssids along with same WPA encryption. After a few attempts it gives me a 'cant get ip' message and ask me to reboot router.

                              Would this work.

                              Make another vlan Id from the downstairs switch. Connect another ethernet cable from the wifi router to the switch and then just trunk my up to the other wifi router upstairs?

                              So it'll go like this

                              Downstairs switch

                              Vlan2 ports 2 and 8, 2 being tagged and going into pfsense and 8 being untagged and going into wifi router with pvid2 ( as that's setup in pfsense )

                              Make a new vlan so let's call this one vlan50
                              Vlan50 has ports 7 and 1. 1 being trunk and tagged and 7 being tagged and goes into a spare port of the wifi router

                              Upstairs switch

                              Make a new vlan, vlan50

                              Ports 1 and 8 in vlan50 with 1 be tagged ( trunk ) and 8 being untagged and going into wifi router ?

                              Didnt think itll be this hard

                              1 Reply Last reply Reply Quote 0
                              • M
                                michael178212
                                last edited by

                                Or am I just over complicating things and the actual setup of the vlans are correct and it can just be somthing to do with the wifi routers

                                1 Reply Last reply Reply Quote 0
                                • johnpozJ
                                  johnpoz LAYER 8 Global Moderator
                                  last edited by

                                  @michael178212 said in 1 vlan over 2 switches:

                                  gives me a 'cant get ip' message and ask me to reboot router.

                                  When you do that look on pfsense - do you see a discover for IP or request... Pfsense can not hand out an IP if doesn't see the discover or request...

                                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                                  If you get confused: Listen to the Music Play
                                  Please don't Chat/PM me for help, unless mod related
                                  SG-4860 24.11 | Lab VMs 2.8, 24.11

                                  1 Reply Last reply Reply Quote 0
                                  • M
                                    michael178212
                                    last edited by

                                    In system logs under dhcp I'm getting dhcp requests and dhcpacks but have had a few of this messages

                                    uid lease 10.10.10.103 for client a8:db:03:e4:a9:5a is duplicate on 10.10.10.0/24

                                    Am I right in thinking that this is basically saying. You cant give that mac address ( my phones mac address ) that ip as it already has an ip ( static 10.10.10.10) ? If so then this would stop the ip from being released wont it or am I completely wrong lol?

                                    1 Reply Last reply Reply Quote 0
                                    • M
                                      michael178212
                                      last edited by

                                      Now I'm home, I've looked at the logs again and I do have some dhcp discoverys, offers, requests and acks but still have that duplicate message. So what I ll try is disconnect the downstairs wifi router and see what the logs say.

                                      1 Reply Last reply Reply Quote 0
                                      • johnpozJ
                                        johnpoz LAYER 8 Global Moderator
                                        last edited by

                                        @michael178212 said in 1 vlan over 2 switches:

                                        a8:db:03:e4:a9:5a

                                        Who owns this mac - what device is it? Look up shows its a Samsung device
                                        https://hwaddress.com/oui-iab/A8-DB-03/

                                        An intelligent man is sometimes forced to be drunk to spend time with his fools
                                        If you get confused: Listen to the Music Play
                                        Please don't Chat/PM me for help, unless mod related
                                        SG-4860 24.11 | Lab VMs 2.8, 24.11

                                        1 Reply Last reply Reply Quote 0
                                        • M
                                          michael178212
                                          last edited by

                                          Sorry yeah it's a samsung phone.. just tried how I said I would and with just one ( upstairs wifi router ) connected, my phone will connect to the wifi and on the right subnet but without internet. Tried changing dns, that didnt work so not a dns issue.

                                          1 Reply Last reply Reply Quote 0
                                          • First post
                                            Last post
                                          Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.