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Environment/Versions Spirent TestCenter. Emulated Devices. Simulated Devices. Answer All emulated devices (directly connected) or simulated devices (indirectly connected) are pingable as long you have the Respond To Ping option enabled in the Spirent TestCenter Application and the DUT has a route to the device's IP address so, the ICMP Echo Request packets can be forwarded.  You can either use static routes or advertise the subnets by running an routing protocol in the emulated devices. You can check Spirent ICMP packets counter like below to check Echo Requests and Replies.