Thanks Haroldo, We knew it was possible to do this based on our earlier research and your config is pretty much what we envisaged, however my question was really aimed how to do it officialy so we maintain support from BT Wholesale. As a provider with 100's of managed circuits we need that support in the event of a fault as we wouldnt want them to reply with 'put the Openreach modem back to carry out testing'.
If you see my reply to Will and Mike I'm told there will soon be the option to provide a self install which will allow us to go down this route, but untill then were happy using the vlan based method on the 887. Thanks SteveH ________________________________________ From: Haroldo F. Jardim Sent: 30 October 2013 16:07 To: Steve Housego; [email protected] Subject: Re: [uknof] BTW FTTC VDSL Modem Hi Steve, I actually have an 887VA-W myself and have been using the built in VDSL controller for a couple of years now without any problems. The configuration itself is straight forward. I remember reading that SIN a while ago and all we need to know/do really is to make sure frames are tagged with VLAN 101. IOS uses interface Ethernet0 for VDSL. So if you just create a subinterface and set the encap to be dot1q 101 should be all you need to ditch the Openreach modem altogether. Here's an example: interface Ethernet0 no ip address ! interface Ethernet0.101 description TO ISP encapsulation dot1Q 101 ip address dhcp In my particular case my ISP uses DHCP, but of course if you're using PPP you can adjust the configuration accordingly. I did just that with a couple of clients and it worked fine. Couple of considerations I'd keep in mind: 0) I've shut down at0 as I believe the use the same physical interface. Just in case you have some obsolete/unused configuration in there. 2) Get the latest firmware for the controller from Cisco website and add it to your config- ie: controller VDSL 0 firmware filename flash:VA_A_38k1_B_38h_24g1.bin 3) 'show controller vdsl 0' will give a lot of information: firmware version, synch status, connection stats and etc. 4) If you experience connectivity issues from your hosts/clients, you might want to look adjusting the TCP MSS accordingly- ie: ip tcp adjust-mss 1452 should account for your IP, TCP and PPP headers if that's what you need. I hope it helps. Haroldo ________________________________ [http://www.it-ps.com/emailimages/itpsmail_r2_c1.gif] "Helping Your ICT Budget Deliver to its Maximum Potential" Steve Housego Principal Consultant IT Professional Services Axwell House Waterside Drive Metrocentre East Business Park Gateshead Tyne & Wear NE11 9HU T. 0191 442 8300 D. 01914428300 M. F. 0191 442 8301 [email protected]<mailto:[email protected]> Check out ITPS's website www.it-ps.com<http://www.it-ps.com/> Keep up to date with all the latest Technology News [http://itpswebhost01.it-ps.com/customer_images/itps/twitter.gif]<http://twitter.com/#!/itpsltd> [http://itpswebhost01.it-ps.com/customer_images/itps/facebook.gif] <http://www.facebook.com/pages/ITPS/180607505381380> [http://itpswebhost01.it-ps.com/customer_images/itps/linkin.gif] <http://www.linkedin.com/profile/edit?trk=hb_tab_pro_top> Company No. 3930001 registered in England VAT No. 734 1935 33
