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jay22
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Joined: Fri May 29, 2020 11:33 pm

STP/BPDU packets problem - who is doing that?

Sat Oct 22, 2022 1:21 pm

Hi,

In our Server(ESXi), we have multiple CHR nodes/VMs, each using by different clients.
Now, on the datacenter end, they enabled the BPDU Guard, so whenever STP/BPDU packet arrives at their switch/gateway, they disable the port.

Here, we are sure some of the clients ran bridge on their VMs and doing the STP toward the main gateway. The problem is that we can not find that CHR VM in our environment!
We tried to track packets using the below command on one of our CHR nodes in the same network/subnet, but the results show only our own CHR's MAC.
[admin@MikroTik] > /tool sniffer quick interface=ether1 mac-protocol=802.2
INTERFACE             TIME    NUM DI SRC-MAC           DST-MAC           VLAN  
ether1             736.911     64 -> 00:50:56:85:85:21 01:00:0C:CC:CC:CC
ether1             769.106     65 -> 00:50:56:85:85:21 01:00:0C:CC:CC:CC
ether1             770.541     66 -> 00:50:56:85:85:21 01:00:0C:CC:CC:CC
ether1             806.558     67 -> 00:50:56:85:85:21 01:00:0C:CC:CC:CC
Any Idea?

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