3Com 3C13618 Command Reference Manual page 85

-f: Set the DF (don't fragment) field of IP header to 1.
ip-address: The specified IP address.
host: Hostname.
Description
Using the ping command, you can check if the IP network connection and host are
reachable.
If not specified, the above parameters are set as follows:
Not performing source IP address routing.
Number of times that the ECHO-REQUEST packet is sent: 5 times.
Socket: Non-DEBUG mode.
Host: Regarded as an IP address first; if it is not an IP address, then it needs to
undergo domain name resolution.
Filling method: Starting from 0x01, and gradually increase until 0x09; then
repeat.
All information including statistics is shown.
No route recorded.
ECHO-REQUEST is sent through route selection.
Packet size of the ECHO-REQUEST packet is 56 bytes.
Timeout for the ECHO-RESPONSE packet is 2000ms.
Non-ECHO-RESPONSE ICMP packets not shown.
While ping is being executed, the ICMP ECHO-REQUEST packet is sent to the
destination. If the network connection to the destination works normally, it will
acknowledge receipt of the ICMP ECHO-REPLY packet in the source host after the
destination host receives the ICMP ECHO-REQUEST,.
The ping command is used to test if network connection is faulty or if the network has
line quality trouble. Its output includes:
Reply from the destination host to every ECHO-REQUEST packet. If no reply
packet is received within the timeout limit, "Request timeout" will be displayed,
otherwise the system will show the count of bytes, sequence number, TTL reply
time, etc. of the reply packet.
Final statistics, including the number of packets sent, number of reply packet
received, percentage of packets unanswered, and the minimum, the maximum
and the average value of the reply time.
If the network transmits at a low speed, the reply packet timeout value can be
increased accordingly.
For related commands, see tracert.
System Management
69