We have been warned that after the reboot due to last saturday blackout the switch mtswitch-sdb is not reachable anymore.

We checked that on the network side in DAQ room all is working.

After agreement with Pacaud we swapped the transceivers on the general infrastructure switch between the sdb2 and sib2 ports and the link down remains on the sdb2 port.

The conclusion is that the failure is on the side of the LAPP mtswitch inside the SDB2 minitower