Operation Manual – System Maintenance and Debugging
H3C S3100 Series Ethernet Switches 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 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.
3.1.2 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.
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