Indeed, there have been several cases where we ended up using auto negotiate for both speed and duplex (on both ends of the connection of course) since that worked and better than hard set duplex. In the last 2 years that has begun to change - the negotiation works more and more. In our machine room the server and network folks have for years hard set everything on both ends since that worked more often than negotiation. Model and vendor matter (not saying one is better than another, but you will get different results based on model and vendor).
#Best duplex ethernet switch for mac driver#
"Some gear just doesn't seem to negotiate well with other gear/software driver versions. Meanwhile, Tom Johnson points out that there may be some negotiation problems between networking equipment from different vendors: "Portfast or Fast Start enables the port and then only disables it if a loop is detected and therefore avoids the problem at a slightly increased risk of a short lived network loop." This causes the port to not auto-negotiate properly. By default spanning tree turns off the port until a check for a network loop has been run. "I have yet to see this problem on an managed switch, where the problem was anything other than spanning tree not having the 'Fast Start' (Nortel) or 'Portfast' (Cisco) options turned on. In some cases, you may need to turn on the "Fast Start" option (Nortel) or "Portfast" (Cisco) option on your spanning tree. Loops create never-ending data paths, resulting in excessive system overhead. The primary purpose of Spanning Tree Protocol is to eliminating loops in bridged networks.
Oddly enough, that also appeared to help file copying across the network." One reader writes "I was informed that I had to disable the Spanning Tree Protocol on our managed switches, in order to get NetBoot to behave. We continue to investigate issues with Ethernet speed under Panther, particularly with problems enabling full-duplex (simultaneous bi-directional transfer).Įnabling Spanning Tree Protocol Some readers have reported that enabling the Spanning Tree Protocol option on their managed switches allows proper full- duplex transfer.
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