There is a problem about "negotiation auto" in Cisco ASR 901. The case is that I config my port in "negotiation-auto" on ASR901. If the-other-side device(non-Cisco) sets it's port in force-up/speed 100. My port will be nego-auto/100-half. From my understanding, Cisco device can set the dulpex to full only if other-side device also opens it's negotiation-auto function. Because if just only one side opens negotiation-auto function, there is no negotiation happens between two devices. The device that opens negotiation-auto function will use a basic dulpex setting which is half-duplex.
However, Some other guy told me that on non-Cisco they can make the port to be nego-auto/100-full-duplex even if the other side sets it's port in force-up/speed 100. So, Is it the Cisco character that It can only do a negotiation-auto and the port is in full-duplex if the other side opens it's negotiation-auto function? Otherwise, is my understanding of negotiation-auto wrong?
