Отзывы о Коммутатор D-link DGS-1008P/D1A
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D-link DGS-1008P/D1A?
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Sometimes devices gets disconnected or some device gets internet access while other dont.
Both band can be used with single password or we can separate band also.
It has four antenna but range is not that good and quite similar to single band 2.4 gh two antenna routers.
1) Es ist normal, dass die Pingzeit zum Switch zwischen 300ms und einer Sekunde liegt. Das stört aber nicht, weil es nur der Ping zum Switch selbst ist. Geräte am Switch sind mit <1ms zu erreichen.
2) Die Konfiguration wird gespeichert. Man muss die Speicherung allerdings manuell im Webinterface anstoßen.
3) Das Webinterface stürzt nicht ab, sondern fährt nur in eine Art Energiesparmodus. Man muss das Webinterface 2x aufrufen, dann funktioniert es.
Allerdings hat das Gerät durchaus einen Bug, den Sie bis heute nicht beheben konnten:
Der zweite POE Passthrough Port schaltet sich nicht automatisch ein.
Mit der aktuellsten B031 Firmware funktioniert der zweite Passthrough überhaupt nicht mehr und mit den älteren Firmware Versionen muss manuell im Webinterface PoE deaktiviert und wieder aktiviert werden, damit PoE am zweiten Gerät nach einem Neustart des Switches funktioniert.
Mein Supportticket dazu ist von D-Link seit 2 Monaten unbeantwortet. Allerdings darf man auch keinen Support erwarten, wenn man ein Gerät in dieser Preisklasse von einem Anbieter wie D-Link erwirbt.
Edit: Das PoE Passthrough Problem konnte vor zwei Tagen behoben werden. Man muss unter "PoE Configuration" bei beiden Ports das Power Limit auf "Class 2" setzen. Dann funktioniert Pass-Through mit beiden PoE Ports.
Der Switch selbst wird auch über PoE mit Strom versogt, sodass dieser keine extra Stromversorgung benötigt.
Dies habe ich vorab getestet bevor die Kameras angebracht wurden. Zu meinem Glück.
Eine Kamera versorgt der Switch gut mit Strom und Daten.
Beim Anschluss der zweiten PoE Kamera schaltet er jedoch komplett ab und keine der Kameras bekommt mehr Strom.
Die Idee an sich ist gut, einen Switch ohne Strom zu betreiben. Jedoch bring er nichts wenn er zu schnell überlastet ist und die PoE Anschlüsse abschaltet.
Aufgrund dessen habe ich den Switch wieder zurück geschickt.
Beachten muss man natürlich, mit wieviel watt man das Gerät bespeist. Wenige werden vermutlich einen 802.3at Hauptswitch haben, sondern ein 802.3af. Damit gibts aber nicht so viel PoE Leistung wie man vielleicht erwartet. Das ist vermutlich auch der Grund für einige schlechte Bewertungen hier.
Das Datenblatt sagt dazu:
PoE-Standard 802.3af
PoE-fähige Ports Port 1 und 2
(max. 15,4 W pro PoE-Port)
PoE-Kapazität 18 W bei Versorgung mit 802.3at / 8 W mit 802.3af
Und im Webinterface immer alles schön abspeichern sonst gehen alle Einstellungen beim Neustart verloren.
Insgesamt ganz klar ein Nischengerät, eher für Spezialanwendungen. Dazu noch recht teuer.
Ich war froh, es gefunden zu haben. Wird ja nicht prominent bei Amazon beworben, wenn man nicht 100%ig weiß, was man sucht.
5 Sterne
Update: 04.09.2019
Das Gerät startete zuletzt alle 30 Sekunden neu. Es war ein Warehousedeal, kann also sein, dass das Teil vom vorherigen Käufer genau deswegen zurückgeschickt wurde. Jedenfalls ist es so nicht brauchbar.
nur noch 3 Sterne
Langzeiterfahrungen hab ich noch keine, sollte sich was ändern schreibe ich ein Update.
Bisher eine klare Kaufempfehlung aus meiner Sicht.
für dessen preis doch lieber auf ein netgear gerät zurückgegriffen.
Das Gerät bezieht seine Sromversorgung nur über den poe-Netzwerkanschluß
Ist auch laut der Funktionsbeschreibung so vorgesehen und in Ordnung.
An den PS Anschlüssen sollte jedoch weitere Energieverorgung möglich sein.
- ich hab es nicht hinbekommen- weder ein Telefon noch für ein Lancomrouter reichte die Leisung-
(um weitere Kritik entgegenzuwirken - der poe-swich der ursprünglich versorgt ist ein poe+ von Lancom)
Auch ein Austauschgerät verhält sich ähnlich.
Somit ist das Gerät nicht für den ernsthaften Einsatz geeignet.
Der Switch macht wie bei der Serie üblich einen sehr guten Eindruck was die Verarbeitung angeht. Das erstmalige Anmelden und anpassen der Einstellungen für das eigene Netzwerk sind kein Problem. Soweit keine Überraschungen.
Gold wert ist der Hinweis, beide PoE-Ports auf Class 2 zu stellen. Auch bei jns funktionierte anfangs nur einer der beiden.
Die Ping-Zeiten sind sehr schwankend und gehen sehr häufig in den Bereich 500 - 700 ms !
Und das ganze völlig ohne Netzlast !
Habe alle Einstellungen überprüft (STP...) hier ist leider keine Lösung zu finden.
Für kritische Anwendungen etc..Gamer ein nicht tragbarer Zustand !
Ein HP Switch zeigt im gleichen Szenario Ping-Zeiten von 1-2 ms.
Trotz der nützlichen Funktion der ausgehenden PoE-Ports würde ich das Teil nicht mehr kaufen !
Geräteleistung sehr entäuschend !
Hat aus meiner Sicht mit Professionalität wenig zu tun, da D-Link mit diesem Gerät auch
gewerbliche Kunden anspricht ist das schon etwas fragwürdig !
Vom Prinzip her wäre das ein tolles Gerät, aufgrund der so niedrig verfügbaren Leistung und des Speicherproblems fällt es bei mir leider durch.
Hatte es für POE Kameras im Einsatz. Nach 8h keine zuverlässige Funktion. Als Switch im Labor für kurzzeitige Test bestimmt zu gebrauchen.
Würde ich nie mehr kaufen.
I can NOT confirm the other reviewer's complaints about 700ms ping response times. I tested it with 1000 PING packets sent to 1.1.1.1, of the 1000 packets 0 (zero) was lost, and average response time was 1ms (one). The other reviewer's unit should've been RMA'd because it sure was a defective one.
Some people fail to read the docs about the PoE pass-through capabilities of the switch, and then complain. So I break it down for ya, so that there won't be any misunderstanding or unjustified assumption. The whole PoE standard is overly complicated, so I can't really blame them, but still, it's not the manufacturer's fault if you expect more than what they promised.
There are 2 standards (actually, more, but only 2 are relevant to this switch), 802.3af (a.k.a. PoE) and 802.3at (a.k.a. PoE+). Often they use PoE and PoE+ interchangeably, but there's a huge difference in power output. 802.3af can deliver up to 15.4W power, while 802.3at can do 30W, almost twice as much.
The switch has an uplink 802.3af / 802.3at port which provides power to the switch. This is called the PD ("powered device") port, you can think of it as the PoE input port.
It also has two 802.3af* PoE ports which can power other devices plugged into the switch. These ports are called PSE ("power sourcing equipment") ports, think of those as PoE output ports.
* This means that if you want to power 802.3at devices with this switch, stop reading, it won't work.
The switch obviously cannot just pull power from the air, it doesn't have its own power supply, so the amount of power it can push out on the two PSE ports depends solely on how much power it receives on the PD port. Specifically, with 802.3af PD it can drive Class 1 (4W) / Class 2 (7W) devices, and only on ONE port at a time. With 802.3at PD it can drive Class 1 / Class 2 devices on BOTH ports, or Class 0 / Class 3 (both 15.4W) on ONE port at a time.
Overall this switch is a little bit pricey, but it delivers. Didn't regret buying it at all.
You unfortunately need to install their software to set it up initially because it won't find an address automatically via DHCP, and a static IP isn't listed anywhere on the product, packaging, or documentation. Their software will scan your network to find the device and do initial configuration. But then you can uninstall the software and never use it again. Was miffed about that, I'd much rather connect to it directly via a web browser the first time I set it up, and not have to install junkware just to get it usable out of the box.
Was mostly interested in the PoE passthrough though, as it's a very hard feature to find in this price range. I wanted to power this switch from my main PoE switch AND then power a wireless access point, without using an additional AC adapter for either this switch or the access point. This did the trick perfectly, so if you have that particular need, this will do the job great. I could see this as being useful if you have a central PoE switch, and need to power a bunch of IP cameras somewhere remotely away from your main networking gear. Just be aware of the maximum power budget if you do that though, it probably can't power too many cameras at once if its being powered over PoE itself.
El propio switch va alimentado sobre PoE, eso es importante por que puedes colocarlo en cualquier sitio sin preocuparte de transformadores ni alimentacion. Lo tengo metido en una caja dentro de una pared. Me ha ahorrado mucho sufrimiento meter mas cables ethernet por los finos tubos de las casas ;)
El unico punto negativo que le saco es que solo tiene dos salidas con PoE las otras dos son normales.
Si j'ai pu faire une configuration initiale me convenant, j'ai pu également noter que ce switch avait un comportement étrange.
En effet, bien que connecté sur le même réseau local, la latence vers l'adresse IP d'administration est très souvent supérieure à 500 ms, ce qui pose plusieurs problèmes pour l'administration : depuis quelques temps, je ne peux plus accéder à l'interface d'administration.
Sinon, les équipements qui y sont raccordés ont une bonne connectivité (pas de latence anormale), et l'alimentation via PoE fonctionne également.
Dommage que ma fenêtre de retour Amazon soit dépassée, sinon cela aurait été un retour pour un remboursement...
Configuration du portail web , que ce soit dhcp, IP fixe ou les autres sont remises a 0 au bout de 10min
Impressionnant
Questo switch è un prodotto SOHO molto ben realizzato completamente realizzato in metallo, ha dimensioni veramente ridotte 150 x 97 x 28 mm (sono riuscito a installarlo facilmente in una scatola di derivazione esterna da 175 x 150 x 80 mm), possibilità di fissarlo al muro (con tasselli inclusi), molto silenzioso perché fanless e non scalda nulla; inoltre è uno switch gigabit gestibile tramite interfaccia web quindi pienamente configurabile in base alle esigenze di ognuno e dotato di interessanti caratteristiche (Bandwidth Control, QoS, VLAN, Link Aggregation, per citarne alcune) ed ha delle potenzialità molto elevate. Forse un po’ complicata la prima configurazione ma una volta compreso come è strutturato il firmware diventa più semplice.
ATTENZIONE: Lo switch non è alimentato da un trasformatore esterno ma direttamente attraverso il cavo di rete che va ad innestarsi nella porta #5 (PoE PD), infatti non dispone di nessun jack di alimentazione su nessuno dei 4 lati della scocca, pertanto dovrete dotarvi o di un router PoE 802.3af o ancor meglio PoE+ 802.3at. Avendo la funzionalità PoE Passthrough lo switch in oggetto è in grado di dirottare sulle porte #1 e #2 (PoE PSE) una parte della alimentazione che riceve dando così la possibilità di alimentare altre due device PoE ovviamente con un budget energetico ridotto rispetto all’alimentazione che riceve.
Nella configurazione in cui lo utilizzo l’alimentazione è fornita da uno switch PoE+ 802.3at TP-Link distante circa 30 m di cavo ethernet e le porte #1 e #2 hanno un budget comune di 18W, al momento vi è attaccata una IPcam Hikvision che consuma circa 3.5W e tutto funziona senza problemi. Unico consiglio che vi posso dare in merito a questo dispositivo è di alimentarlo con un dispositivo PoE+ 802.3at altrimenti rischiate di non avere abbastanza potenza per alimentare le device che volete installare a valle.
Un nota dolente di questo acquisto è stata la consegna di Amazon, decisamente sotto le aspettative; la consegna del pacco è stata spostata ben tre volte perché il corriere non trovava l’indirizzo (a cui consegnano da ormai 4 anni).
Provato su switch Poe ed anche con injector da 32watt ma niente da fare!
If properly used, this device WILL power 2 PoE pass through devices if they each require less than 7W of power.
I used it to power 2 Ubiquiti UAP-AC-LR Access Points rated at 6.5W each, and it works great!
The confusion lies in that most people don't understand that they may have to configure the switch's PoE settings via its web interface. During power up, the switch checks the PoE end devices in ports 1-2. If both end PoE devices correctly identify themselves to the switch as Class 1 (4W) or 2 (7W), both PoE pass through ports will automatically work and power up 2 devices. Most PoE devices don't properly identify themselves, as this is an optional feature. If they don't properly identify themselves, the switch gives full Class 3 (15.4W) PoE power to port 1, and disables port 2 because there isn't enough power left to power a second device.
YOU CAN OVERRIDE THIS IN THE WEB INTERFACE as long as your end PoE devices don't require more than 7W of power each. To do this, you log into the switches web interface with IP 10.90.90.90 and password admin. You then find your way to the PoE configuration section and manually set both PoE pass through ports 1 and 2 to "Class 2" power limit. After this, both PoE pass through ports will work, with a max of 7W per port. Also, make sure that the primary PoE switch you have powering the DLink is 802.3at (PoE+) capable, as the DLink will need the full 25W from the primary switch to be able to pass through 7W to each PoE pass through device and power itself.
I hope this helps some people who think this device doesn't work, or who are trying to figure out how to make it work for the first time. It took me a bit of research to figure it all out, but it is well worth it. This is a great device if you have 1 network wire somewhere (such as an attic) but need to power 2 PoE devices of 7W or less.
***UPDATE***
Everything I wrote above is true, but I just wanted to update. Once installed onsite, with longer cable runs, it had problems powering 2x Ubiquiti UAP-AC-LR access points. Their specs show 6.5W max, but they appear to draw more. Under load with short (6') cable runs, they worked flawless. On site with longer cable runs (1x6', 1x75', and a 100' input cat6) they would shut off and restart when put under load. I don't discredit the switch for this, more Ubiquiti for under-estimating the max power draw. I did end up using the switch + 1 AP pass through powered by the cat6, and the other externally powered but linked to this switch for data. I am sure the switch would be fine to POE pass through 2 lower powered devices.
I programmed the switch for DHCP and Class 2 repeatedly, and the settings would work for a few minutes, and then the unit would reset itself again. The settings also would disappear if I power cycled the unit. Updating the firmware did not fix the problem.
This made the unit unusable for me, which is a shame because it had some nice features, such as reporting of the actual power used by each connected device. For example my two Reolink cameras are rated at <8 W + <10 W = <18 W ,which is near the 18 W limit of the switch, but when I had both plugged in and working, they were actually drawing <<< 5 W each.
I returned the unit and ordered a Netgear GS105PE instead (ASIN B00J8NAWZ8). The Netgear unit worked right out of the box to power my Reolink RLC-411 and my Reolink RLC-410, so I didn't even have to program anything. But I programmed the network settings, etc., and the unit has run well for several hours, and the settings have survived several power cycles, so I'm assuming it's good to go. It doesn't have programmable POE levels, and it doesn't report the power used, but it works.
BTW I'm powering this unit from an Amcrest AMPS5E4P-AT-65 (ASIN B074ZTNHNW) which supplies POE+/802.3at 65w total, and that unit works fine.
Took power from my Ubiquiti Edge Router PoE with no problem and everything's running smooth at full speed.
Setup was pretty straight forward if you have even light experience with managed switches (or don't mind a little manual reading). Personally I was able to figure it out intuitively but I've also done this professionally in the past so take that as you will.
Anyway, can't complain about the performance, highly recommended for home/small office use.
I needed to use DLink app to get it set up and then later to find the right IP address (after I changed it to DHCP).
I was able to use a small TP Link POE injector to get the switch working, but it was not strong enough to power my IP phone at the same time. I replace the injector with one with more power and it worked ok. Although it still seemed to struggle if I plugged two phones in.
This, however, did not work out well at all - the DGS-1100-05PD seems to have some problem providing enough power to the UAP-AC-LITE when the AP is under stress. The AP would often reboot when stressed.
I first tried to replace my 802.3af injector with an 802.3at injector, and letting power class get automatically detected. This still did not work, I kept having the same issues. Changing the device to class 3 (15.4W) did not work either. Setting the power limit to 18W also did not work. Always the same issue. Further, the monitoring from the switch itself showed the AP never consumed more than 6.5W as advertised.
I replaced this switch with one that does not let me override the device class for devices with unspecified devices, and it is working perfectly while connected to an 802.3at injector. Sadly, this means I can't power the switch+AP from an 802.3af injector, which was my original goal.
I'm not sure exactly what might be happening. I can take two educated guesses here: (1) some bug in the 802.3af protocol negotiations with the AP, causing the switch to not provide sufficient power; or (2) the voltage drop across the switch is actually quite high, causing the AP to get enough power, but not enough voltage to operate normally (I did notice that the voltage the switch was powering the AP with was ~45V, which is a lot lower than the POE spec's 48V).
Apart from that issue, which I still hold some hope might be solvable in firmware, or at least a newer revision of the switch's hardware, the switch is pretty nice. Small sturdy construction, and it does work nicely when not powering other devices. It is also competitively priced with other similar kits.





