Geekzone: technology news, blogs, forums
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

2184 posts

Uber Geek
+1 received by user: 661


Topic # 232091 29-Mar-2018 10:58
Send private message

We have a situation at work where we are about to share a space with another company. To stop duplication of Wifi infrastructure, we plan to share Wifi Infrastructure.


My plan is to have our switch stack, loop into an access port from our switch stack to an access port on their switch stack, then go up a trunk, which includes their and our WiFi networks on some shared APs with separate SSID's.


The issue we are having is a clash of subnets, both wanting to use 10.10.x.x. 


My thoughts are this actually isn't an issue, as from our perspective, they are simply piping a VLAN from an access port, up a trunk to an AP. There is zero routing between our VLAN/their VLAN and therefore the traffic inside the VLAN doesn't really matter at all.


This makes sense in my head, but I've got a workmate who is adamant it's going to cause issues/not work.


Any input greatly appreciated. 

Create new topic
674 posts

Ultimate Geek
+1 received by user: 112

  Reply # 1985331 29-Mar-2018 11:05
Send private message

That should work fine.


VLAN's are layer 2, below IP which is layer 3. IP addressing is not relevant.


Assuming it is configured correctly, what you are doing is no different to having completely separate systems. 

2436 posts

Uber Geek
+1 received by user: 832

Lifetime subscriber

  Reply # 1985332 29-Mar-2018 11:05
One person supports this post
Send private message

As long as the VLANs are separate and there is no router in-between you can shared IP Address space.


It's pure layer 2 switched networks into your Access Points where the router connected on your end and the customer end handle the routing.


I would just make sure that the stack switch you are using doesn't have an IP address configured on the other companies network. Since that could cause routing between the two networks if the Layer 2 switch is inadvertently configured as a router.

2184 posts

Uber Geek
+1 received by user: 661


  Reply # 1985351 29-Mar-2018 11:32
Send private message

Cool, thanks for the sanity check. 

Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:

Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:

Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:

Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.