H3C Technologies H3C S3100 Series Switches - Manual (Page 827)

3-1
3
Network Connectivity Test
Network Connectivity Test
ping
You can use the ping command to check the network connectivity and the reachability of a host.
Table 3-1 The ping command
Operation Command Description
Check the IP network
connectivity and the
reachability of a host
ping [ -a ip-address ] [-c count ] [ -d ] [ -f ] [ -h ttl ]
[ -i interface-type interface-number ] [ ip ] [ -n ] [ -
p pattern ] [ -q ] [ -s packetsize ] [ -t timeout ]
[ -tos tos ] [ -v ] host
You can execute this
command in any view.
This command can output the following results:
z Response status for each ping packet. If no response packet is received within the timeout time,
the message "Request time out" is displayed. Otherwise, the number of data bytes, packet serial
number, TTL (time to live) and response time of the response packet are displayed.
z 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.
tracert
You can use the tracert command to trace the gateways that a packet passes from the source to the
destination. This command is mainly used to check the network connectivity. It can also be used to help
locate the network faults.
The executing procedure of the tracert command is as follows: First, the source host sends a data
packet with the TTL of 1, and the first hop device returns an ICMP error message indicating that it
cannot forward this packet because of TTL timeout. Then, the source host resends the packet with the
TTL of 2, and the second hop device also returns an ICMP TTL timeout message. This procedure goes
on and on until the packet gets to the destination. During the procedure, the system records the source
address of each ICMP TTL timeout message in order to offer the path that the packet passed through to
the destination.
Table 3-2 The tracert command
Operation Command Description
View the gateways that a packet
passes from the source host to the
destination tracert [ -a source-ip ] [ -f first-ttl ]
[ -m max-ttl ] [ -p port ] [ -q
num-packet ] [ -w timeout ] string
You can execute the tracert
command in any view.