I'm trying to adjust the TX-ring limit on a vbr-nrt vc 20Mbit/s. We are using fancy queuing with RED enabled in the default class. We also run a voice class so we want to keep jitter and and delay to a minimum.
When I use a TX-ring limit of 12 for example, the drop rate in the class-default is somewhere around 30-200kbit/s, is this normal ?
I've been trying to find a best practice for the TX-ring setting but the Cisco documentation just says "small to keep delay down, but large enough not to affect throughput".
Is a TX-ring limit of 12 to low for a VC at this speed ?