Cable Forum - View Single Post - 120M Looks like Virgin are determined to flush out old modems

Chrysalis · 09-10-2013, 20:04

4 would see congestion maybe if an area is heavily utilised and eg. all 8 channels only have 5mbit/sec spare capacity, so then a 30mbit user would get 20mbit on 4 channels and full 30 on 8.

But if an area is that heavy utilised and given how spiky utilisation is on such small shared pipes then I think 8 channel modems would still see congestion as well just not so severe.

VM/ntl have for years supplied more channels than the modem can use, this was how they operated before bonding started, eg. back in the docsis1 days was 4 US channels load balancing modems that could only use 1 US channel. Of course it was configured in a flawed manner, as channel hopping often got results in dodging congestion. It still happens now with users connected to 1 or 2 US with 2 or 3 US in the pool.

On my vmng300 I did see channel rotation on the DS as well, but it wasnt much as was only 5 DS channels activated in my area, VM didnt bump it to 8 until after I started using my superhub.

I only changed to the superhub in my last month of service as I had FTTC installed and no longer cared as much for my VM connection, if I didnt have FTTC I likely would still be using the vmng300 now.

09-10-2013, 20:04	#32
Chrysalis Inactive Join Date: Sep 2003 Posts: 12,047	Re: Looks like Virgin are determined to flush out old modems 4 would see congestion maybe if an area is heavily utilised and eg. all 8 channels only have 5mbit/sec spare capacity, so then a 30mbit user would get 20mbit on 4 channels and full 30 on 8. But if an area is that heavy utilised and given how spiky utilisation is on such small shared pipes then I think 8 channel modems would still see congestion as well just not so severe. VM/ntl have for years supplied more channels than the modem can use, this was how they operated before bonding started, eg. back in the docsis1 days was 4 US channels load balancing modems that could only use 1 US channel. Of course it was configured in a flawed manner, as channel hopping often got results in dodging congestion. It still happens now with users connected to 1 or 2 US with 2 or 3 US in the pool. On my vmng300 I did see channel rotation on the DS as well, but it wasnt much as was only 5 DS channels activated in my area, VM didnt bump it to 8 until after I started using my superhub. I only changed to the superhub in my last month of service as I had FTTC installed and no longer cared as much for my VM connection, if I didnt have FTTC I likely would still be using the vmng300 now.