After performing peer analysis in gLiveView, the IN peers show no RTT values, whereas the OUT peers do return the expected values. A screengrab is attached to illustrate.
Can anyone give me a clue why this might be?

After performing peer analysis in gLiveView, the IN peers show no RTT values, whereas the OUT peers do return the expected values. A screengrab is attached to illustrate.
Can anyone give me a clue why this might be?

Try to ping the hosts, if not responding it means ICMP is filtered and that’s why you don’t see the RTT
Thankyou very much sir. ICMP was indeed filtered.