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Forum Discussion
GS305E Link speed goes down when IDLE
I have a GS305E new, on first floor, to which I've attached 3 LANs, all Cat6a: 2 cables towards to local PCs (a Mac and a Win), one cable to the switch below (longer cable 12meters).
When all boots from scratch, all 3 ports are at 1Gbps as they should, and remain like that during the day. No problem. During nights, or when long long time idle, it can happens that some ports go down to 100 Mbps. If I unplug the cable and reinsert, nothing it stays at 100Mbit ... but if I unplug the cable and attach it to one of the other 2 residual ports - it restart starts again at 1Gbps. So often in the morning I need to just move the cable to one port to another.
It does not depend on the port number, nor on which of three cable (long or short)... It looks like if for long time idle, some kind of power saving kicks in on that port to slow down to 100Mbits to save energy ... and only way to avoid it is so to use another port which was unused for long time. Problem is that the GS305E management console DOES NOT have any power save or power management option ... so not possible to disable. I'm bought with latest firmware, nonetheless I reinstalled again the latest available firmware.
Weird, if I move cable, and work all day the 1 Gbps will always be on there ... any clue ? I still can use it as long as I change the ports manually in the morning :-D
4 Replies
As per the GS305E &GS308E Data Sheet, the GS305E isn't supposed to have any IEEE 802.3az Energy Efficient Ethernet (EEE) functionality, the Gigabit Ethernet Smart Managed Plus Switches Models GS105Ev2 GS105PE GS108Ev3 GS108PEv3 GS116Ev2 GS305E GS308E JGS516PE JGS524Ev2 JGS524PE User Manual does confirm the feature and control is available on select models only.
However, based on your description, it appears there is some (and aprently not properly working!) IEEE 802.3az Energy Efficient Ethernet (EEE) function active on the switch core why ever. Under normal conditions, when both end on each connection are supporting EEE, the link should return to it's normal link speed.
Please try the initial firmware (v1.0.1) available from GS305E | Smart Managed Plus Switch | NETGEAR Support Downloads -> [View Previous Versions], do a factory reset, and re-test.
YeZ action required for the switch engineering, thank you!
- Thanks for the answer will try firmware.
I will try to reinstall the firmware, but the current and latest ones are:
Bootloader Version V1.0.0.2
Firmware Version V1.0.0.5
Cannot find 1.0.1 so my take is the original as per 1.0.0.1 - correct ?
Small note: I found also a way to trick the software. So this morning I found it again on 100 Mbit, and through the management console I force the port first to 10Mbit... applied, waited a second, and the put the port setting back to AUTO ... and it got back to 1000 (1 Gbps).
This would further point this is not a cable thing, but some kind of firmware behaviour.
Anyway thanks a lot for support
Sorry please, my mistake - initial was 1.0.0.1, then 1.0.0.3 (multilanguage).
ariolica wrote:Small note: I found also a way to trick the software. So this morning I found it again on 100 Mbit, and through the management console I force the port first to 10Mbit... applied, waited a second, and the put the port setting back to AUTO ... and it got back to 1000 (1 Gbps).
This process will force a re-negotiation on the link.
ariolica wrote:This would further point this is not a cable thing, but some kind of firmware behaviour.
The question is what does cause the link reduction. If we had this on one link, one could think about a cable issue doing short disconnect and reconnect, or not properly run all four pairs as required.
My suspicion is still that the core has some faulty EEE in place.
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