Operation Manual – System Maintenance and Debugging
H3C S5100-SI/EI Series Ethernet Switches
Chapter 3 Network Connectivity Test
3-1
Chapter 3 Network Connectivity Test
When configuring network connectivity test, go to these sections for information you
are interested in:
z
ping
z
tracert
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.
To do…
Use the command…
Remarks
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, time to live (TTL) 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
