Odd MAC address showing up after OC200 5.5.7 and 2210P 3.20.4 upgrades

Odd MAC address showing up after OC200 5.5.7 and 2210P 3.20.4 upgrades

Odd MAC address showing up after OC200 5.5.7 and 2210P 3.20.4 upgrades
Odd MAC address showing up after OC200 5.5.7 and 2210P 3.20.4 upgrades
2022-09-07 22:24:24 - last edited 2022-09-09 02:45:55
Model: OC200  
Hardware Version: V1
Firmware Version: 5.5.7

Anyone notice after their upgrades that their event log is showing odd MAC addresses that do not resolve to anything??  I also notice that they are different VLAN's.  Right now it only appears to be my 2210P that is acting up and this might be due to my update to 3.20.4

 

 

72-FD-A0-99-2C-0D was disconnected from network "HOME-VLAN-30" on SW_Basement(connected time:1h46m connected, traffic: 0Bytes).

Sep 07, 2022 16:56:43  

72-FD-A0-99-2C-0D is connected to SW_Basement on HOME-VLAN-30 network.

Sep 07, 2022 16:56:41  

64-00-31-15-00-14 was disconnected from network "MGT-VLAN-1" on SW_Basement(connected time:5m connected, traffic: 0Bytes).

Sep 07, 2022 16:43:35  

64-00-31-15-00-14 is connected to SW_Basement on MGT-VLAN-1 network.

Sep 07, 2022 16:38:31  

64-00-31-15-00-09 was disconnected from network "MGT-VLAN-1" on SW_Basement(connected time:7m connected, traffic: 0Bytes).

Sep 07, 2022 16:16:05  

64-00-31-15-00-09 is connected to SW_Basement on MGT-VLAN-1 network.

Sep 07, 2022 16:08:42  

72-FD-A0-99-2C-0D was disconnected from network "HOME-VLAN-30" on SW_Basement(connected time:41m connected, traffic: 0Bytes).

Sep 07, 2022 15:51:05  

72-FD-A0-99-2C-0D is connected to SW_Basement on HOME-VLAN-30 network.

Sep 07, 2022 15:50:28  

72-FD-A0-99-2C-0D was disconnected from network "HOME-VLAN-30" on SW_Basement(connected time:29m connected, traffic: 0Bytes).

Sep 07, 2022 15:09:41  

72-FD-A0-99-2C-0D is connected to SW_Basement on HOME-VLAN-30 network.

  0      
  0      
#1
Options
1 Accepted Solution
Re:Odd MAC address showing up after OC200 5.5.7 and 2210P 3.20.4 upgrades-Solution
2022-09-09 02:45:50 - last edited 2022-09-09 02:45:55

  @Virgo I was able to find the issue. I went around the house and tried checking the MAC addresses and didnt find it. But I looked at my logs and didnt notice my company ipad listed anywhere.  I brought that in the house from my vehicle and checked it.  I had earlier put a block on the MAC so it could not get on the network.  Sure enough the ipad mini was not connected.  

 

I cleared the block and allowed it to join.  Then I checked the wifi settings and sure enough APPLE has a feature called "PRIVATE WIFI ADDRESS".  That was checked and it was using a rogue MAC address not listed anywhere.  And it also was not telling me the hostname of the device...So Apple had me going for a day trying to figure out where this odd MAC was coming from.

 

Now I know!

 

Lesson learned is if you see any odd MAC addresses, check your apple devices (and perhaps Android since I realize that they can do that as well with random MAC addresses).  

Recommended Solution
  1  
  1  
#4
Options
3 Reply
Re:Odd MAC address showing up after OC200 5.5.7 and 2210P 3.20.4 upgrades
2022-09-08 08:52:29

  @Fleegle61 

 

You can try downgrading the firmware version of the switch to see if you can reproduce the problem, which may be a issue with the new firmware.

  0  
  0  
#2
Options
Re:Odd MAC address showing up after OC200 5.5.7 and 2210P 3.20.4 upgrades
2022-09-08 10:47:26

  @Virgo Funny you should say that.  I already downgraded the switch once since some of us were seeing disconnects happening when we went to 3.20.4.  So I went back to 3.20.2 and power cycled the switch. That stabilized things.  So I decided to put 3.20.4 back and now new issues.  But before I try another downgrade I may try another power cycle to see if that clears it up. 

  0  
  0  
#3
Options
Re:Odd MAC address showing up after OC200 5.5.7 and 2210P 3.20.4 upgrades-Solution
2022-09-09 02:45:50 - last edited 2022-09-09 02:45:55

  @Virgo I was able to find the issue. I went around the house and tried checking the MAC addresses and didnt find it. But I looked at my logs and didnt notice my company ipad listed anywhere.  I brought that in the house from my vehicle and checked it.  I had earlier put a block on the MAC so it could not get on the network.  Sure enough the ipad mini was not connected.  

 

I cleared the block and allowed it to join.  Then I checked the wifi settings and sure enough APPLE has a feature called "PRIVATE WIFI ADDRESS".  That was checked and it was using a rogue MAC address not listed anywhere.  And it also was not telling me the hostname of the device...So Apple had me going for a day trying to figure out where this odd MAC was coming from.

 

Now I know!

 

Lesson learned is if you see any odd MAC addresses, check your apple devices (and perhaps Android since I realize that they can do that as well with random MAC addresses).  

Recommended Solution
  1  
  1  
#4
Options

Information

Helpful: 0

Views: 112

Replies: 3

Related Articles