One OSN7500 has EGS2 board configured like EPLAN solution different Metro 1000 equipments are connected to it, one of them (NE5) has broken fiber problems over two ports and to avoid services affectation on the ring due other fiber problem; the customer decided to connect both fibers betwwen them and configure Metro 1000 equipment like pre-configured. (See attachment).
The people incharge of Data equipment reported that switch is locked and the CPU rate is increased.
1. Check all equipments connected to EPLAN solution, if one of them is like preconfigured or has fiber connected on street; delete VCTRUNK on EGS2 board.
2. Enable RSTP protocol in EGS2 board to avoid broadcast storm.
When the customer connected the fibers (NE5) on site PHY MAC generated a loopback on switch and it increased CPU rate, broadcast storm and switch locked.
When the equipments belong to EPLAN configuration its necessary to check how many VCTRUNKS and how many services are currently working.