My provider does not support Multilink PPP so LFI is not an option.
Is setting the tx-ring limit to 1 ok? I plan to use LLQ but wanted to do as much as possible to minimise delay.
Please refer to the following document and search for qos within the document:
The 870 series supports advanced qos features. The document above has many references to qos support I would recommend reviewing. You do not need to modify the transmit ring. This will be modified to a value of 2 when you enable qos and attach a service policy to an interface.
Steve Lyons - Cisco