3Com Switch 4500 Family Manual page 829

-t timeout: Specifies the timeout time (in milliseconds) before an ICMP ECHO-REPLY packet is received
after an ICMP ECHO-REQUEST packet is sent. The timeout argument ranges from 0 to 65535 ms and
defaults to 2,000 ms.
-tos tos: Specifies the ToS value of the ICMP ECHO-REQUEST packets in the range 0 to 255. By
default, this value is 0.
-v: Specifies to display other ICMP packets received (that is, non-ECHO-REPLY packets). By default,
other ICMP packets like non-ECHO-REPLY packets are not displayed.
string: Host name of the destination host, ranging from 1 to 30 characters.
The ping command also supports the ipv6 keyword. For details, refer to IPv6 Management Command.
Description
Use the ping command to check the reachability of a host, and output the related statistics information.
The executing procedure of the ping command is as follows: First, the source host sends an ICMP
ECHO-REQUEST packet to the destination host. If the connection to the destination network is normal,
the destination host receives this packet and responds with an ICMP ECHO-REPLY packet.
You can use the ping command to check the network connectivity and the quality of a network line. This
command can output the following information:
Response status of the destination to each ICMP ECHO-REQUEST packet, including the number
of bytes, packet sequence number, TTL and response time of the response packet if the response
packet is received within the timeout time. If no response packet is received within the timeout time,
the message "Request time out" is displayed instead.
Final statistics, including the numbers of sent packets and received response packets, the
irresponsive packet percentage, and the minimum, average and maximum values of response
time.
You can set a relatively long timeout time if the network transmission speed is slow.
Related commands: tracert.
Examples
# Check the reachability of the host whose IP address is 202.38.160.244.
<Sysname> ping 202.38.160.244
ping 202.38.160.244 : 56 data bytes, press CTRL_C to break
Reply from 202.38.160.244 : bytes=56 sequence=1 ttl=255 time = 1ms
Reply from 202.38.160.244 : bytes=56 sequence=2 ttl=255 time = 2ms
Reply from 202.38.160.244 : bytes=56 sequence=3 ttl=255 time = 1ms
Reply from 202.38.160.244 : bytes=56 sequence=4 ttl=255 time = 3ms
Reply from 202.38.160.244 : bytes=56 sequence=5 ttl=255 time = 2ms
--202.38.160.244 ping statistics--
5 packet transmitted
5 packet received
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