ICMP Protocol

The Internet Control Message Protocol (ICMP) detects and reports network error conditions. ICMP reports on the following:

• Dropped packets – Packets that arrive too fast to be processed

• Connectivity failure – A destination system cannot be reached

• Redirection – Redirecting a sending system to use another router

Chapter 8, Administering a TCP/IP Network (Tasks) contains more information on Oracle Solaris commands that use ICMP for error detection.