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Check for STP on Backend Network

The BFC 3.5 has an enhanced Network Diagnostic at Install and Discovery time.

STP turned on is displayed in the SOC. Please see user guide attached.

Network_Diagnostics.pdf

STP (Spanning tree protocol) is not supported on the backend network and must be turned off.

STP is allowed on the frontend.

To check for it you can run the following from any server on the backend interface. In this example eth0 is the backend interface.

tcpdump -c 3 -l -i eth0 stp   

If the command does not exit after a while you can hit control-c (wait at least 5 minutes).

Example output of STP turned off.

0 packets captured
0 packets received by filter
0 packets dropped by kernel

If the first value is non 0 or if any packets are echo'd to the command line then STP is enabled on the backend.

Example output of STP turned on:

1 packets captured
0 packets received by filter
0 packets dropped by kernel
3 packets captured
3 packets received by filter
0 packets dropped by kernel