Merge pull request #248501 from cburuzie/cburuzie-patch-1

Update load-balancer-test-frontend-reachability.md

Author: prmerger-automator[bot]

articles/load-balancer/load-balancer-test-frontend-reachability.md

@@ -213,6 +213,7 @@ Based on the current health probe state of your backend instances, you receive d
 ## Usage considerations
 
 - ICMP pings can't be disabled and are allowed by default on Standard Public Load Balancers.
+- By design, ICMP pings with packet sizes larger than 64 bytes will be dropped, leading to timeouts. 
 
 > [!NOTE]
 > ICMP ping requests are not sent to the backend instances; they are handled by the Load Balancer.