I have recently had BT Infinity installed and I'm impressed so far, low ping times and above all consistency both of ping and speed. I let the initial install settle, so have been using the BT Modem >>>> BT Home Hub 3 and it's been highly reliable.

However some issues have arisen:
1. Wireless printers do not seem to remain attached to the network
2. Ports are left open for SNMP and cannot be closed!
3. Cannot change the DNS settings from those provided by BT

So I cut back over to my beautiful 2820n, immediately all the issues above have disappeared.

However, both my ping times and bandwidth have degraded, pings were 15-40, now they're 20-60, I'm not overly fussed by this. Speed however has dropped from a consistent 35/36 to 24/26.

If anyone has any suggestions or experience of optimising this I'd be really grateful.

BTW Firmware is 3.3.3_232201