Gigabit LAN auto switch to 100

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GraySenshi

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Apr 15, 2016
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I have a GA-Z170-HD3 and the LAN on the motherboard. And automatically wants to run on 100mbps. when I need the higher rate. so I go to Speed & Duplex and set it to gigabit. then when I try to use Windows binding with a pci gigabit LAN card. it will put it back to 100 so I only get 1.1gigabit speed. What is going on
 
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Teaming has almost the same issues as duplex. Both ends much be set properly or both set to use LACP. Even though there are a bunch of managed switches that say they support port aggregation many of the more unkown brands do not do a good job. Even cisco ones do nasty things...then again the is partially because cisco has a proprietary port bonding method in addition to LACP.

Still port aggregation tends to have very little benefit in a home installation. Because of how it select the connection to use it will not improve the speed of a single file transfer. It will use only 1 of the ports.
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molletts

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Jun 16, 2009
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Have you tried using a different cable and switch port? If one of the 8 wires isn't connected properly, a gigabit adaptor will normally drop back to 100Mbps.

(As an aside, I assume your switch supports and is correctly configured for port bonding/link aggregation/trunking/802.3ad/LACP...?)
 
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GraySenshi

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Apr 15, 2016
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Found out the problem the port on the switch I forget I had limited that one. Yea I knew there wasn't anything rong with the hardware since it used to work. But now I have a new question.

When I have them set in teaming. I used a bench mark software. it said I had about 500 Mbps speed but when I would copy a video from one ram storage drive or ssd to ssd. I was only getting 30 megabytes and if I disabled teaming and used eather card I would get 112 up and down speed. What's causing this I know the switch supports teaming.
 
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bill001g

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Aug 9, 2012
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Teaming has almost the same issues as duplex. Both ends much be set properly or both set to use LACP. Even though there are a bunch of managed switches that say they support port aggregation many of the more unkown brands do not do a good job. Even cisco ones do nasty things...then again the is partially because cisco has a proprietary port bonding method in addition to LACP.

Still port aggregation tends to have very little benefit in a home installation. Because of how it select the connection to use it will not improve the speed of a single file transfer. It will use only 1 of the ports.
 
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molletts

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Jun 16, 2009
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Bill001g has pretty much said it - teaming can be funky!

What is your primary use case? If you just want to transfer large files faster, teaming will probably not help much anyway as each file stream is likely to go over one or other of the two links rather than being shared out (depending on the hashing algorithm that the PCs and switch use to distribute traffic). If both PCs are running Windows 8/Server 2012 or above, you would be better off assigning two IP addresses to each PC (one for each network connection) and letting SMB Multichannel do its stuff - it should detect that there is more than one path available and use both in parallel.
 
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