Command Manual - System Management
Quidway S2000 Series Ethernet Switches Chapter 4 System Maintenance Commands
4-20
string: IP address of the destination host or the hostname of the remote system.
Description
Using tracert command, you can check the reachability of network connection and
troubleshoot the network. User can test gateways passed by the packets transmitted
from the host to the destination.
By default, when the parameters are not specified,
first-TTL is 1,
max-TTL is 30,
port is 33434,
nqueries is 3 and
timeout is 5s.
The tracert command sends a packet with TTL 1, and the first hop will send an ICMP
error message back to indicate this packet cannot be transmitted (because of TTL
timeout). Then this packet will be sent again with TTL 2, and the second hop will
indicate a TTL timeout error. Perform this operation repeatedly till reaching the
destination. These processes are operated to record the source address of each ICMP
TTL timeout so as to provide a path to the destination for an IP packet.
After ping command finds some error on the network, perform tracert to locate the
error.
The output of tracert command includes IP address of all the gateways to the
destination. If a certain gateway times out, output "***".
Example
# Test the gateways passed by the packets to the destination host at 18.26.0.115.
<Quidway> tracert 18.26.0.115
tracert to allspice.lcs.mit.edu (18.26.0.115), 30 hops max
1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms
2 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 19 ms 19 ms
3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 19 ms
4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 19 ms 39 ms 39 ms
5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 20 ms 39 ms 39 ms
6 128.32.197.4 (128.32.197.4) 59 ms 119 ms 39 ms
7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 39 ms
8 129.140.70.13 (129.140.70.13) 80 ms 79 ms 99 ms
9 129.140.71.6 (129.140.71.6) 139 ms 139 ms 159 ms
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