M4300-96X occasional packet loss

Question

We have 18 devices connected to the M4300-96X with PoE mode, the devices are kept running always. However, we found there are occasional packet loss, the probability is about one packet loss every three days. We prefere to regard it as normal. However, we want to get more technical explanation:

Is there any relevant standard define the requirement of the PLR (packet loss rate) on 10GbE network?

LaurentMa · Answer

Hi there,
&nbsp;
Yes, of course. If the PoE Max LED is sometimes up, it means that something is exhausting the PoE budget in the switch. Yes in that case PoE will be shut on some ports provoking packet loss in the interval, likely.
&nbsp;
If the devices shouldn't exhaust the PoE budget, it means that something is wrong in their PoE advertisement maybe - not presenting their class correctly, which leads the switch to allocate more PoE power than needed.
&nbsp;
I would look into that first, the PoE pages in the GUI will show the PoE classes etc. Alternatively, the PoE method can be changed in the switch, to accommodate such special problem, but it would be better to make sure the PD devices (PoE powered devices) advertize correctly.
&nbsp;
Please try to reproduce this issue (wait until you see it happen again), and export the Tech-Support file from the switch at that time. Maintenance\Export\HTTP File Export and select tech-support in the dropdown menu. Please send us your tech-support file at ProAVDesign@netgear.com and we'll take a look for you.
&nbsp;
Regards,

schumaku · Answer

Packets are not lost in the switch - much more on the links. Typical cause for packet loss are bit errors, caused by poor SNR, insufficient power allocation on an optical link, insufficient link bandwidth, jitter, baseline wander, ..

By wally brain, IEEE states 1*10^-10 for the acceptable BER on a 1000M link. Some discussions were around on 1x10^-13 for the acceptable BER on 10G links.

LaurentMa do you have any more information at hand?

MarsKeeper · Answer

Hi Schumaku:&nbsp;Thanks for your reply!&nbsp;I still have some addtional questions:1. In the experiment, the devices are powered by PoE mode and it seemed that the PoE budget (capacity) is very critical because the PoE MAX indicator lit on occasionally. As the worst situation, some devices even rebooted because the power was not enough.Do you think the insufficient PoE power may lead error packet on the 10G copper link?2. Could you tell me the No. of the IEEE specification about the BER? If you do not remember the exact No. a rough range would be helpful for us.&nbsp;Thanks!

schumaku · Answer

MarsKeeper&nbsp;wrote:1. In the experiment, the devices are powered by PoE mode and it seemed that the PoE budget (capacity) is very critical because the PoE MAX indicator lit on occasionally.What kind of PoE devices are we facing here? Any tech data or references available?&nbsp;For completeness, provide the config (modules, power supplies) of the M4300-96X please.&nbsp;MarsKeeper&nbsp;wrote:As the worst situation, some devices even rebooted because the power was not enough.Do you think the insufficient PoE power may lead error packet on the 10G copper link?If the device powered does not get enough power (e.g. when it's exceeding the negotiated and speced power) anything can go wrong with the clients... This might have an impact on the 10G link. Crash recovery is the worst case happening.&nbsp;MarsKeeper&nbsp;wrote:2. Could you tell me the No. of the IEEE specification about the BER? If you do not remember the exact No. a rough range would be helpful for us.Hm by rule of old cells 802.3ab for Gigabit Ethernet .. don't shoot me 8-)&nbsp;&nbsp;

MarsKeeper · Answer

The powered deice is developed by ourselves, it is not meaningful to discuss its model because you can not purchase it on the market now. It is a PoE+ device, the switch has the below configuration:1200W PSU&nbsp;&nbsp; x1APM408C&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x3APM408P&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x3APM408F&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; x2We found that if the connected devices is more than 20, some devices may reboot repeatedly and the PoE MAX led light on occcasionally. We calculated the PoE budget according the manual and the result said that it was enough.In fact, I have requsested a support ticket to solve this problem but the process is slow because we are busy on another things recently.I will check the IEEE document to get the BER specification.&nbsp;Thank you very much!

Forum Discussion

M4300-96X occasional packet loss

8 Replies

Related Content

M4300-96X Visio Stencils

M4300 -96x Stacking

M4300-96X Multicast not getting through

NETGEAR M4300-96X Switch named Best AV-over-IP Product of ISE 2019

M4300-96X ProSAFE 96-port 10G, Ports Physical Status Unknown & Detach

NETGEAR Academy

ProSupport for Business