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Will307
Contributor I
January 13, 2023

Network duplicate MAC addresses?

I seem to be having network issues and it now seems to point to Sonos.  I have many zones in my house.  Several Sonos devices have the same MAC address (example below is 34-7e-5c-9f-8f-dc).  How is this possible? This can’t be good for my network and in fact I do get connectivity issues indicative of dups. 

 

Interface: 192.168.1.141 --- 0xc
  Internet Address      Physical Address      Type
  192.168.1.1           34-98-b5-d5-b1-13     dynamic   
  192.168.1.10          48-a6-b8-e6-7a-a4     dynamic   
  192.168.1.11          5c-aa-fd-20-ed-aa     dynamic   
  192.168.1.21          e4-4c-6c-02-7e-a1     dynamic   
  192.168.1.53          e0-70-ea-e9-92-f0     dynamic   
  192.168.1.60          54-2a-1b-90-2b-20     dynamic   
  192.168.1.64          34-7e-5c-9f-8f-dc     dynamic   
  192.168.1.66          34-7e-5c-9f-8f-dc     dynamic   
  192.168.1.69          34-7e-5c-9f-8f-dc     dynamic   
  192.168.1.77          54-2a-1b-90-2b-20     dynamic   
  192.168.1.79          c0-d2-f3-51-f7-e6     dynamic   
  192.168.1.81          b0-41-1d-fc-c7-b7     dynamic   
  192.168.1.92          48-a6-b8-fb-a5-20     dynamic   
  192.168.1.93          b8-e9-37-a6-c5-f0     dynamic   
  192.168.1.94          90-11-95-9f-1d-15     dynamic   
  192.168.1.103         5c-aa-fd-20-21-0e     dynamic   
  192.168.1.105         48-a6-b8-ea-f5-a0     dynamic   
  192.168.1.108         34-7e-5c-9f-8f-dc     dynamic   
  192.168.1.112         b8-e9-37-e8-d5-aa     dynamic   
  192.168.1.114         38-42-0b-32-da-b2     dynamic   
  192.168.1.115         5c-c3-36-4d-02-d1     dynamic   
  192.168.1.116         b8-e9-37-e8-d5-88     dynamic   
  192.168.1.120         b0-41-1d-fc-e8-5a     dynamic   
  192.168.1.121         00-f3-61-79-9e-c0     dynamic   
  192.168.1.126         38-c8-04-46-99-53     dynamic   
  192.168.1.134         38-f7-3d-ac-2c-a3     dynamic   
  192.168.1.135         b8-e9-37-e8-d4-d6     dynamic   
  192.168.1.136         2c-71-ff-04-66-d6     dynamic   
  192.168.1.137         00-11-32-73-e6-af     dynamic   
  192.168.1.139         dc-a6-32-db-c4-60     dynamic   
  192.168.1.143         00-17-88-a2-b0-6e     dynamic   
  192.168.1.145         b8-e9-37-e8-d5-e6     dynamic   
  192.168.1.151         34-e1-d1-80-90-ec     dynamic   
  192.168.1.152         38-f7-3d-84-72-3b     dynamic   
  192.168.1.163         9c-95-61-de-b5-05     dynamic   
  192.168.1.164         64-e0-03-87-dc-0b     dynamic   
  192.168.1.166         f8-0f-f9-9e-69-de     dynamic   
  192.168.1.168         84-ea-ed-20-74-b0     dynamic   
  192.168.1.170         34-f1-50-9c-d2-26     dynamic   
  192.168.1.171         f8-4f-ad-61-69-f3     dynamic   
  192.168.1.172         1c-30-08-e0-24-47     dynamic   
  192.168.1.173         68-b6-91-ca-6c-80     dynamic   
  192.168.1.175         b0-e4-d5-d3-95-d9     dynamic   
  192.168.1.184         1c-30-08-59-70-80     dynamic   
  192.168.1.195         f8-4f-ad-e9-47-c6     dynamic   
  192.168.1.196         2c-71-ff-d0-f9-bd     dynamic   
  192.168.1.197         20-f5-43-d3-39-3a     dynamic   
  192.168.1.198         dc-72-23-4f-c4-a3     dynamic   
  192.168.1.206         54-2a-1b-90-2b-20     dynamic   
  192.168.1.255         ff-ff-ff-ff-ff-ff     static    
  224.0.0.2             01-00-5e-00-00-02     static    
  224.0.0.22            01-00-5e-00-00-16     static    
  224.0.0.250           01-00-5e-00-00-fa     static    
  224.0.0.251           01-00-5e-00-00-fb     static    
  224.0.0.252           01-00-5e-00-00-fc     static    
  239.255.255.250       01-00-5e-7f-ff-fa     static    
  239.255.255.251       01-00-5e-7f-ff-fb     static    
  255.255.255.255       ff-ff-ff-ff-ff-ff     static 

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18 replies

John B
January 13, 2023

Hi. This is all your router's doing, not Sonos. 

Are 64, 66, 69 and 108 the components of a Home Theatre setup?

Will307Author
Contributor I
January 13, 2023

Yes with the Beam

John B
January 13, 2023

The Sub and surrounds connect via the Beam, not directly to the network. Your router is having difficulty seeing the Mac addresses so is proxying the Beam's MAC address to the other components.

I don't think this would cause network issues.  The components have unique IP addresses. I am not sufficiently expert to say with total authority that this is not a problem, but I don't think it is

Will307Author
Contributor I
January 13, 2023

It certainly kills being able to reserve IPs.  However,  I’m not 100% sure it causes negative behavior's. 

John B
January 13, 2023

What negative behaviours are you experiencing? 

Will307Author
Contributor I
January 13, 2023

Disconnects of certain devices.  Sonos devices appearing and disappearing. 

Stanley_4
Stanley_4
Grand Maestro
January 14, 2023

You can still reserve IPs for your Sonos, just use the dataplate’s MAC to set it up. 

Not sure if that would cause your router glitch to go away or not though.

Once assigned power down all Sonos and reboot the router, then power the Sonos back up. This should clear any cached IP and MAC data and give you a clean and stable start.

buzz
buzz
Grand Maestro
January 14, 2023

Which model router are you using?

Will307Author
Contributor I
January 14, 2023

That will take a while as I have over a dozen Sonos devices.  But I will try.  What I did just try is to enable IGMP proxy on my Orbi.  I found some threads about this reducing traffic due to Sonos multi-casting.  

Will307Author
Contributor I
January 14, 2023

My router is Netgear Orbi RBRE960 with two Sats

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