H3C Technologies H3C S3100 Series Switches - Manual (Page 596)

Operation Manual – System Maintenance and Debugging
H3C S3100-52P Ethernet Switch Chapter 3 Network Connectivity Test
3-1
Chapter 3 Network Connectivity Test
3.1 Network Connectivity Test
3.1.1 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 use 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.
3.1.2 tracert
You can use the tracert command to trace the gateways a packet passes during its
journey from the source to the destination. This command is mainly used to check the
network connectivity. It can help you locate the trouble spot of the network.
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.