4-60 ES3000 User Guide
ICMP is the basic ping command. When a ping command is issued, the packet sent is an ICMP echo packet. The packet waits for the ICMP echo reply packet to complete the ping process. The ICMP returns additional information to an echo reply if there is a ping failure (network or host unreachable etc.).
Source IP Address: The Source IP Address only accepts IP version 4 addresses (four bytes long). The format is four numbers separated by three decimal points. For example, 61.31.38.225.
Destination IP Address: The destination Internet Protocol Address. Same format as Source IP address.
Source Layer 4 Port: The source transportation layer port number of a data packet. It is two bytes with a value between 0 and 65535. Values under 1024 are reserved for specific applications. Symbol recommends using a port number over 1024.
Destination Layer 4 Port: The destination transportation layer port number of a data packet. The format and allocation are the same as the Source Layer 4 Port.
