vlan help

swain90

swain90

swain90

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Joined
7 Aug 2012
Posts
949
Hi All,

I was wondering if someone would be able to help me with something...

I'm essentially trying to find a way of getting a pc to be able to communicate across 2 vlans

Hopefully the picture below should demonstrate more than me writing it down;

https://drive.google.com/file/d/1IbezeD1-AOVExPW75dmD5KKn6Hc5X8Er/view

I'm wanting PC3 to be able to communicate with all 4 devices.

I've been looking this morning into how to add multiple vlans to a port, but on further reading it sounds like it's doable with trunking, however that doesn't help/work for an end device like a PC, only if it's connected another switch.

If anyone has any suggestions that'd be useful.

Cheers

Swain90
 
The networks / VLANs will need to be routed or you can multihome the PC and have it exist on both VLANs. You could do this with two NICs, one in each VLAN or setup a single port as a trunk from the switch, depends on the OS how this would be done at the PC end.
 
I don't really want to go down the route of using a second network card as its possible that there may be more than 2 subnets that PC3 needs to communicate with. I've tried the trunk method using the cisco software however I'm unable to ping either subnet devices when it's enabled which i think comes down to the trunk method being designed for network devices not just end devices like a PC, unless I'm not understanding correctly.
 
You can trunk to a PC, easily done on Linux and esxi etc, for windows you will need advanced features normally found with full fat drivers and not the cut down included ones, really does depend on the NIC you are using and what the driver makes available.

Search for setting up Dot1q or 802.1q for windows if that you need.
 
Doesn't this network have a router somewhere? Even an ISP supplied one? If so, what type is it? You may be able to route on a stick if it's a business supplied one.

Without a L3 device, as mentioned above you need a PC host OS capable of it.

You may be able to do something like adding the Hyper V feature to your PC if it's Windows 10, then creating multiple switches and tagging the VLANs. I've never tried it as in production/homelab I usually use a device capable of L3 routing, or trunking to Hyper V and tag the various switches as appropriate. It would have course depend on if your PC NIC is compatible as also mentioned above, as this is usually server hardware only.
 
You can buy a GB L3 capable switch off ebay for £50. Don't mess about using pc hardware as a switch/router.
 
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