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Vlan passing problem

ChriZathens

Hello guys!

Just a small disclaimer: My problem is actually not related to the UTM at all (other than the fact that I am creating a vlan in the UTM). However posting here in hope someone can help since this forum has a lot knowledgeable and nice people Slight smile

First let me attach a basic network diagram of what I have:

So I have created a vlan (vlan10) on the utm. Added a new DHCP server for this vlan etc

The UTM is connected to  a dumb unmanaged linksys switch. On the same switch I have a unifi Access Point. On the AP I created a secondary guest wifi network that uses vlan 10.

When I connect to that ssid all is good, I get an IP address from the DHCP server of Vlan10 and all. So the dumb switch actually passes through the vlan to the AP without any issues.

This unmanaged switch is connected to a TP-Link homeplug and this gives network to the other side of the house, in my bedroom,  where I also have my tiny home office.

There is another homeplug in the bedroom that is connected to a managed switch (HP procurve) on port 2. On the HP switch, I have various systems connected, including a secondary Unifi AP

If I try to connect directly to the secondary AP, that is in my bedroom, but connect to the guest SSID (vlan10), I never get an IP address from the DHCP server of vlan10.

So the vlan seems not being passed to the bedroom side of the house

On the managed HP switch I have created vlan10 and assigned port 23 to that vlan. Connecting my laptop to the port result in no ip address for the laptop. Assigning a static IP on the vlan10 subnet on the laptop results to nothing ( I cannot ping vlan10 gateway IP)

Additionally tagging port 2 on the HP switch to carry both vlans (the default and vlan10) breaks all connectivity to the UTM side of the house

My best guess is that I need to replace the linksys switch with a managed one and tag the port that goes to the living room homeplug with both vlans (??)

That was my intention from the start (ie to have managed switches on both sides in order to use vlans), but then I realized that the AP which is connected to the dumb switch gets the vlan information without issue, so the dumb switch seems to pass the vlan information just fine... In this regard, I thought that tagging the uplink port on the HP switch (creating a port trunk in Cisco language) would do the trick, but as I mentioned, this breaks all connectivity to the "left" side of the network.

Any insights welcome..

Thanks a lot!



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  • +1

    Pull out the unmanaged dumb switch and buy a second one (HP) managed switch. Best experience with same brands, especially with vlan, trunk, etc.

    I am 99,99% sure that the dumb switch is the reason and I also wonder how the vlan10 is reaching the unifi ap - because this should not work properly and not be able to handle any vlan tag. and if needed for you...try to read something about vlan tagging, trunks, etc generally and also especially for HP.

    //edit: also my suggestion to you -> deactivate all "security features" like storm control, flood protection, etc. on the HP switches. I had some strange problems with ubiquiti cameras and sophos wlan etc few years ago (HP 1810-24G).

    Good luck and regards,

    Andy.

  • 0 in reply to nd

    Hello, Andy

    Thanks for the suggestions

    I actually have the same HP switch hehe..

    I already have another managed switch (not a procurve though, I have a Netgear prosafe one)

    I will have to find it and replace the dumb switch, then. 

    Thanks again!

     
    Sophos XG Home Licence.

    Machine: Checkpoint 3100 appliance (Intel Atom C2558 CPU, 6GB Ram, 250GB sata SSD)
  • 0 in reply to ChriZathens

    but remember and think of it: try to use allways identically switches. A (used) HP 1810-24G you can buy for about 40-50 EUR on ebay.

    one year ago I had in my house one unmanaged cisco 8port switch, and I wondered about strange interruptions - like buffering -  while watching videos over my local network from a NAS.

    PC/Beamer <-> Cisco 8Port <-> HP 1810-24G <-> HP 1810-24G <-> NAS

    Replacing that cisco device with a unmanaged zyxel solved that problem directly; now I have everywhere HP inhouse... ;)

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  • 0 in reply to ChriZathens

    but remember and think of it: try to use allways identically switches. A (used) HP 1810-24G you can buy for about 40-50 EUR on ebay.

    one year ago I had in my house one unmanaged cisco 8port switch, and I wondered about strange interruptions - like buffering -  while watching videos over my local network from a NAS.

    PC/Beamer <-> Cisco 8Port <-> HP 1810-24G <-> HP 1810-24G <-> NAS

    Replacing that cisco device with a unmanaged zyxel solved that problem directly; now I have everywhere HP inhouse... ;)

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