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DougB628's avatar
DougB628
Apprentice
Jan 25, 2019

DHCP not working properly, log filling with DHCP assignments

So I have noticed that after rebooting, sometimes DHCP doesn't work properly. No devices that use DHCP, whether they have a DHCP reservation or not, get DHCP assigned IP addresses. Whenever this prob...
Troubleshooting
FURRYe38's avatar
FURRYe38
Guru - Experienced User
Jan 29, 2019

I see this one switch as green ethernet:

https://www.trendnet.com/products/product-detail?prod=570_TEG-S82g

 

As mentioned before I believe, Orbi systems don't seem to get along with anything with Green Ethernet:

https://community.netgear.com/t5/Orbi/switching-requirements-for-ethernet-backhaul/m-p/1653718/highlight/true#M43817
https://community.netgear.com/t5/Orbi/Ready-to-chuck-this-system-through-the-window/m-p/1658470/highlight/false#M44394

 

I would remove ALL switches from the ORbi system temporarilty and see the problem continues. 

DougB628 wrote:

I have three switches, they are all TrendNet unmanaged switches. Two are model number TEG-S82g H/W:V2.0R, the other is model number TEG-S80g H/W:V2.1R

 

Only one of the TEG-S82g switches is actually in use at the moment. All three of them are 1GB/100MB/10MB capable.

 

DougB628's avatar
DougB628
Apprentice
Feb 02, 2019

I have intentionally left my setup as is, with no configuration changes, and it has been stable for almost a week. To me, this proves that the "green" switches have nothing to do with this issue, and that any issue is related to DHCP being re-initialized and there being a chance that when it is re-initialized, it has a chance of starting up in an unstable state. By not making any configuration changes, and seeing my Orbi system remain stable the entire time, I think I have proven that the TrendNet switches are highly unlikely to be related to any issue.

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Feb 02, 2019

    I would test the system with out the switches to see if the behavior your seeing continues or not. 

    Any thing is possible. We've just seen that others posted that once they removed there "Green Ethernet" switches, there problems were fixed.

    DougB628 wrote:

    I have intentionally left my setup as is, with no configuration changes, and it has been stable for almost a week. To me, this proves that the "green" switches have nothing to do with this issue, and that any issue is related to DHCP being re-initialized and there being a chance that when it is re-initialized, it has a chance of starting up in an unstable state. By not making any configuration changes, and seeing my Orbi system remain stable the entire time, I think I have proven that the TrendNet switches are highly unlikely to be related to any issue.

     

    • DougB628's avatar
      DougB628
      Apprentice
      Feb 08, 2019

      So I've been shopping switches lately, and it seems that most of them tout IEEE energy saving features. If the "green" switches are in fact contributing to my problem, how do I know what type of switch to get? For example, the Netgear GS316 16-port Gigabit Ethernet Unmanaged switch includes this on its data sheet:

       

      • 802.3az Energy Efficient Ethernet (EEE) compliance

      Will this be a problem? If not, then what is it about the "green" swtiches that causes the problem?