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XS748T-100NES - unable to disable/switch off Green Ethernet?
Hi, We recently starting to endeavour into the 10GBe roam, replacing our existing GS752TSB, GS752TP's etc. The likely candidate was looking to be the XS748T-100NES, sourced locally, all but quite a...
schumaku
Thank you so much for your elaborate response, really appreciated!For most I agree with your below, however, in this instance we are using enterprise NAS-ses and I noticed the XS748T, whilst WOL was (already) turned-on at the NAS-side, turned-off the ports completely and thus "disabling" the WOL functionality inadvertenly, so it seemed.
Could very well be indeed the aforementioned Fast Ethernet-mode on the NAS side, that is unfortunately not something documented on our side as far as I was able to find out.
The fact you can't influence that from the XS748T side, is thus a deal-breaker for us. Unfortunately.
(and the XS748T also didn't support UTP nor auto-MDI/MDX for our environment monitors did not help either)
Something we never ever encountered before with our (plenty!) other NetGear switches.So, we are not refering to typical (Windows) OS- (and driver-) challenges in our instance.
(but I'm aware of such, although noticed something similar with our Mac infrastructure too)
But the mere fact you can't influence/set the "Green Ethernet" related settings from the XS748T is I believe a poor choice.
I can understand that NetGear made that concious choice to be more cost-effective but it does, in my humble opinion, also reduce the "downwards compatibilty" of the XS748T in an existing (Netgear) environment as we found out the hard way, so to speak.
The XS748T was readely available from our suppliers (also in quantity) and price-wise was already a bit steep-ish.
The M4300-48X is something we may look into altough our budget is finite, and indeed quite more expensive (almost double the price).
Again, thank you so much, I can understand Netgear's position but some of the choices made regarding the function(s) of the XS748T make it quite challenging and very unfortunate.
But that is what it is, glad we could return our unit and cancel the orders.
Neither Auto Power Power Down nor Short Cable Mode does interfere in any way with WoL, here is why:
When the port link is down (cable disconnected, or peer adapter completely powered off), the PHY automatically goes completely down for a very short short period, to be waked up again in in auto-negotiation mode for checking the link pulses. As long as there are no link pulses, it won't power up. An Ethernet adapter will - in normal operations, and awaiting WoL - will send link pulses, the Ethernet link will be up and active. otherwise, the magic packet has no transport media at all... True is that some adapters run on lower link rates while in WoL mode, eg. only retain a Fast Ethernet (100 Mb/s) link. Perfectly sufficient, and requiring less power. If the link signals would go away, the switch has no reason to keep the link up, and the process does start above again.
If the link is up, and a short cable is detected, the Shot Cable Mode comes into play. It does not make sense to send full power into the short cable for various reasons. Either way, also in short cable mode with the reduced power levels, the pulses will go through, and the link as well as the connection can be established and retained.
The switch does - even with the green features enabled - not power down a port as long as the link is established.
For some years, especially since Windows 10, there were a lot of fancy discussions and ideas when WoL works, and when not... Think different power status of a Windows 10 system, or for the sake also a decent Windows server. The control of the complete "off" system is up to the BIOS where there are controls for WoL enable/disable and so on. For any other power level, Windows is at the controls, hibernate, hybrid sleep, sleep, ... Lots of crappy drivers are in the field, and often Microsoft does by far not provide something decent on this level, many older driver simply suffer under various power states.
There are lengthy discussions and explanations on working and non-working Windows 10 WoL on different systems all over in the net - completely independent of the switch.
The XS728T and XS748T were from the first generation of very affordable 10G switch lines (after the initial XS712Tv1), some features were minimized, so for example the PHY chips are very basic, and do for example not support 10Mb/s Ethernet, among a few other details. When I remember right, the always-on Green Ethernet or the lack of control for it is one of these simplifications. The configuration limitations ref. are clearly documented in the user manual.
Netgear has of course fully fledged 10G switches with complete controls in this area, but they come with a higher price tag, like the M4300-48X for example.
The XS724EM does strictly stick with EEE, this can be disabled on a global base.
schumaku
Thank you so much for your elaborate response, really appreciated!
For most I agree with your below, however, in this instance we are using enterprise NAS-ses and I noticed the XS748T, whilst WOL was (already) turned-on at the NAS-side, turned-off the ports completely and thus "disabling" the WOL functionality inadvertenly, so it seemed.
Could very well be indeed the aforementioned Fast Ethernet-mode on the NAS side, that is unfortunately not something documented on our side as far as I was able to find out.
The fact you can't influence that from the XS748T side, is thus a deal-breaker for us. Unfortunately.
(and the XS748T also didn't support UTP nor auto-MDI/MDX for our environment monitors did not help either)
Something we never ever encountered before with our (plenty!) other NetGear switches.
So, we are not refering to typical (Windows) OS- (and driver-) challenges in our instance.
(but I'm aware of such, although noticed something similar with our Mac infrastructure too)
But the mere fact you can't influence/set the "Green Ethernet" related settings from the XS748T is I believe a poor choice.
I can understand that NetGear made that concious choice to be more cost-effective but it does, in my humble opinion, also reduce the "downwards compatibilty" of the XS748T in an existing (Netgear) environment as we found out the hard way, so to speak.
The XS748T was readely available from our suppliers (also in quantity) and price-wise was already a bit steep-ish.
The M4300-48X is something we may look into altough our budget is finite, and indeed quite more expensive (almost double the price).
Again, thank you so much, I can understand Netgear's position but some of the choices made regarding the function(s) of the XS748T make it quite challenging and very unfortunate.
But that is what it is, glad we could return our unit and cancel the orders.
Define "enterprise NAS" - I'm well connected in this business area, and might have something similar in house anyway with smaller units all on XS728T and XS748T, heavier stuff on a modular M4300-96X.
RobLigt wrote:(and the XS748T also didn't support UTP nor auto-MDI/MDX for our environment monitors did not help either)
This reads like Grimms' Fairy Tales (nice eh, the draft had just two letters) - from the fine documentation (28-Port and 48-Port 10-Gigabit Copper Smart Managed Pro Switch with 4 SFP+ Ports Hardware Installation Guide p.16):
===
1G/10G RJ-45 Ports
All copper RJ-45 ports support AutoSensing. When you insert a cable into an RJ-45 port, the
switch automatically ascertains the maximum speed (1 Gbps or 10 Gbps) and duplex mode
(half-duplex or full-duplex) of the attached device. All ports support a Category 5e (Cat 5e)
unshielded twisted-pair (UTP) cable or higher rated Ethernet cable terminated with an 8-pin
RJ-45 connector.
To simplify the procedure for attaching devices, all RJ-45 ports support Auto Uplink. This
technology allows attaching devices to the RJ-45 ports with either straight-through or
crossover cables.===
And yes, these switches went through my hands before these switches hit the market....
We are using QNAP's mainly for our NAS-parks, I tried counting but lost count beyond 30x units, in 1x of our locations alone.
Most are the ES-series (ES1686dc, TDS-1649U R2's, TS1683XU-RP's, 16 bays) but for our tests I used the smaller ones, the TVS-h1688x and TS-1685 as I could easer cart these around without the need to dive into a rackspace.
Next to that we also use Infortrend EonStor's for DAS applications, which also had issues after I hooked them to the XS748T.
For our environmrnt-monitor, alarms, security, etc, we are using BlackBox, NTI Enviromux and SensaPhone's.
Where some use cross-cables and kicked-off alarms after connectng to the XS748T, several of those ports were inspected and noted to be down.
Also our IP-based KVM (Raritan's, amongst others) ceased working.Interesting - because I know QNAP and Infortrend use these switches in the QA and test environments ... and I have bunches of customers with QTS and QES systems with the same switches in the field. The first QES lab was built around an early XS7xxE, later TS7xxT were used. The last two years, we're mainly deploying SFP+ for 10G/40G interfaces. Completely obscure to me - will challenge QNAP QA for any known issues.
Ref. the environment monitoring: Blackbox Alertworks, NTI EM's, and the Sensaphone Stratus typically have 10/100 Mb/s Ethernet ports - definitively not supported on the XS728T/XS748T so don't blame the messenger.
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