Lan Extension: VLAN or Single Subnet HELP>>

[svan]

Hello All,

I urgently need you guidance with this.>>> !


We currently run two servers, therefore domains split by a VLAN (two different subnets) for our Admin & Curriculum networks on one site.

A Lan Extension is about to be installed, to connect a new site 1.5km away. Virgin Media\Synetrix are doing the installation and have now said the VLAN will not be re-created as there will only be 1xRJ45 port either end. This is against what they originally said, hence why we went the lan extension route.

They now suggest either getting someone to configurer a VLAN with segmented switches either end or going to a single subnet.

We are very unhappy, as we were lead to believe, the VLAN would be re-created as part of the install and that we would just be able to
plug back in our equipment and have the two sites connected and running as before!!

Can a knowledgeable person comment on any negatives in going to a single subnets, the enormity of the task and is this a better or worse option over getting the VLAN re-configured.??

Time is not our friend on this!!

Any other comments greatly appreciated.

many many thanks in advance.

svan.

 

[Chief Wiggum]

I'm pretty sure you should have had a PAC (design) that details exactly what would be provided before you placed the order and would have been provided by the account team.
It's not really clear what you want to do from your post. VMB should be able to carry one or both VLANs over a LAN extension then you just plug your VLAN capable switch in the end with your VLANs configured. That way you are carrying traffic at layer 2 between the sites.
Or you have a Ethernet circuit that runs at layer 3, so you have to route across it and you'll need a router at both ends. If the service is managed, they'll provide a router, if not, it's down to you.

In terms of the design, you have separate subnets for a reason so that is down to you as t whether its a risk for your organisation. If its a Ethernet circuit then you can place access lists on each VLAN to keep the traffic separate. I'd advise against one flat subnet as the broadcasts could get a bit messy.

 

[svan]

I'm pretty sure you should have had a PAC (design) that details exactly what would be provided before you placed the order and would have been provided by the account team.
It's not really clear what you want to do from your post. VMB should be able to carry one or both VLANs over a LAN extension then you just plug your VLAN capable switch in the end with your VLANs configured. That way you are carrying traffic at layer 2 between the sites.
Or you have a Ethernet circuit that runs at layer 3, so you have to route across it and you'll need a router at both ends. If the service is managed, they'll provide a router, if not, it's down to you.

In terms of the design, you have separate subnets for a reason so that is down to you as t whether its a risk for your organisation. If its a Ethernet circuit then you can place access lists on each VLAN to keep the traffic separate. I'd advise against one flat subnet as the broadcasts could get a bit messy.

Hi Wiggum,

I really appreciate your reply.

I was surprised that there wasn't mention of each piece of kit VMB were supplying...! I thought VMB should just carry what we currently have in place, namely the VLAN over this lan extension so that as you say, we can just plug in out switches (without any configuration (so wouldnt need to add any vlan settings?)) into their kit and be immediately up and running. (Could we just plug our ethernet switches into this setup, if the vlan was carried across?

The single subnet could be an issue, with all the broadcasts on one range?? and why should we be any worst off, by upgrading and choosing this option.

My gut feeling is the single subnet suggestion on their part is a bit of a cop out.. Oh, and would it create a lot of work on our part.

Thanks again

svan