response gateway networking issue

It seems that multicast (IGMP) snooping is blocked in the switch.

But i have 8 units more and they working normally 

Did you check the network settings of this device?

yes, it’s in dynamic ip mode

but is this make difference. It should appear at any mode , am i right?

So you have an DHCP server running in the system? The other gateways are also in DHCP mode?
Did you check your network setting with concert?

No all of them are have static ip 

All gateways and routers, switches and console should have a static IP.

I am not able to reach gateway to do configuration even through GCE 

For response gateways you need concert 4.0.2, GCE is discontinued.

You can download here https://www.etcconnect.com/Products/Networking/Software/Concert.aspx

it’s not appear on concert  also if i pinging there is no response 

You can ping a device only if it had a static IP or if there is a known IP set by DHCP. In concert there is a function to find devices.

ok , thanks for ur help

I do all of the above sittings and still not shown. Also in net concert there is unknown device which I can’t edit 

Did you checked the networkcable? Maybe you should call ETC tech. service