R3721-F3210-F3171-HP High-End Firewalls System Management and Maintenance Command Reference-6PW101

2
0x0000002f repeatedly to make the total length of the packet meet the requirements of the device. By
default, the padded value starts from 0x01 up to 0xff, where another round starts again if necessary, like
0x010203…feff01….
-q: Displays only statistics. If this keyword is not specified, the system displays all information.
-r: Records routing information. If this keyword is not provided, routes are not recorded.
-s packet-size: Specifies length (in bytes) of an ICMP echo request, which ranges from 20 to 8100 and
defaults to 56.
-t timeout: Specifies the timeout value (in milliseconds) of an ICMP echo reply. If the source does not
receive an ICMP echo reply within the timeout, it considers the ICMP echo reply timed out. The value
ranges from 0 to 65535 and defaults to 2000.
-tos tos: Specifies the ToS value of an echo request, which ranges from 0 to 255 and defaults to 0.
-v: Displays non ICMP echo reply received. If this keyword is not provided, the system does not display
non ICMP echo reply.
-vpn-instance vpn-instance-name: Specifies the VPN to which the destination belongs, where the
vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. If the destination is on the
public network, do not specify this option.
host: IP address or host name (a string of 1 to 255 characters) of the destination.
Description
Use ping to verify whether the destination in an IP network is reachable, and to display the related
statistics.
With the ping command executed, the source sends an ICMP echo request to the destination:
• If the destination name is unrecognizable, the system outputs "Error: Ping: Unknown host
host-name".
• If the source receives an ICMP echo reply from the destination within the timeout, the system outputs
the related information of the reply.
• If the source does not receive an ICMP echo reply from the destination within the timeout, the system
outputs "Request time out".
To use the name of the destination host to perform the ping operation, you must configure Domain Name
System (DNS) on the device first. Otherwise, the ping operation fails. For more information about DNS,
see Network Management Configuration Guide. In addition, you must use the command in the form of
ping ip ip instead of ping ip if the destination name is a key word, such as ip.
Only the directly connected segment address can be pinged if the outbound interface is specified with
the -i keyword.
To abort the ping operation during the execution of the command, press Ctrl+C.
Examples
# Verify whether the device with an IP address of 1.1.2.2 is reachable.
<Sysname> ping 1.1.2.2
PING 1.1.2.2: 56 data bytes, press CTRL_C to break
Reply from 1.1.2.2: bytes=56 Sequence=1 ttl=254 time=205 ms
Reply from 1.1.2.2: bytes=56 Sequence=2 ttl=254 time=1 ms
Reply from 1.1.2.2: bytes=56 Sequence=3 ttl=254 time=1 ms
Reply from 1.1.2.2: bytes=56 Sequence=4 ttl=254 time=1 ms