Using VLANs with a BT Business Hub

Dan-Humphreys

We have just cabled our new office at work. I am convincing the boss to buy a 24 port Cisco PoE switch. This is required as phone handset's get their power over the Cat5e, I don't think the phones are VoIP, but I don't know much about them.

I have a question though, I was considering splitting the phone's and the PC's to different VLANs on the switch. I am curious though, would this work the the BT Business Hub used for the incomming connection?

I wondered if I could give the VLANs addresses such as 192.168.1.1 255.255.255.128 for one and 192.168.1.129 255.255.255.128 for the other, then connect 2 uplinks from the switch to the BT Business Hub, but set the LAN on the Business Hub as 192.168.1.0 255.255.255.0 would this work?

TehToG

1. What kind of switch did you get?
2. Does it have layer 3 capabilities?
3. How are the phones handled? Are they voip? Is there a controller on site? What model are they?
4. Which BT router do you have, they have a few different models they give. Is it a 2wire model?
5. How many users do you support, Do you use/need wireless access?


edit: To answer with the info I now have. The BT routers are dumb and don't support 802.1Q. Unless you have Layer 3 capabilities then you can't route between the vlans you create so it's useless. If they're voip phones you really do need them on a separate vlan so you can priortise their traffic.
In your examples the first /25 would be 192.168.1.0 255.255.255.128 not 1.1 and overlapping vlans would cause issues for broadcasts etc.