Hi Thomas, > The problem with the model is that it makes assumptions that just do not >reflect the reality of much of the equipment that is deployed today. For >instance, >while there is a lot of power used in the line card optics, the idle power >supply >capacity is another giant waste of power. This cannot be mitigated without >shutting down the entire device. Further considerations need to be made >around the back-up facility power as well, which while not directly influenced >by >network traffic, does influence overall power utilization.
Yes, network traffic does not directly influence the power consumption of some facilities such as air conditioners. Then energy conservation for these facilities is clearly out the scope of GreenTE (or PANET). It may as well be out of the scope of IETF. We focus on how to coordinate network devices through the control/management plane _protocols_ to achieve energy conservation. That's the problem scope. > Yes, but if the equipment is already very power efficient, the law of >diminishing returns (or unexpected consequences) may dominate the equation. I know, they are most power efficient when packets get through at their peak rate. But, when they are idle (i.e., no packets are being forwarded), the power efficient is awkwardly very low. Line-cards can consume 80% of the MAX power even when they do not forward any packet. So, power efficient of a single device does not lead to power efficient of whole network, right? Thanks, Mingui Zhang Huawei Technologies _______________________________________________ rtgwg mailing list [email protected] https://www.ietf.org/mailman/listinfo/rtgwg
