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2400 CHAPTER 160: SYSTEM MAINTAINING COMMANDS
The “hop limit” field in this prompt information has the same meaning as the
“ttl” field in the prompt information displayed by the IPv4 ping command,
indicating the TTL value in the ICMPv6 echo request.
tracert
Syntax tracert [ -a source-ip | -f first-ttl | -m max-ttl | -p port | -q packet-number |
-vpn-instance vpn-instance-name | -w timeout ] * remote-system
View Any view
Parameter -a source-ip: Specifies the source IP address of a tracert packet. It must be a legal
IP address configured on the device.
-f first-ttl: Specifies the first TTL, that is, the allowed number of hops for the first
packet, in the range 1 to 255. It defaults to 1 and must be less than the maximum
TTL.
-m max-ttl: Specifies the maximum TTL, that is, the maximum allowed number of
hops for a packet, in the range 1 to 255. It defaults to 30, and must be greater
than the first TTL.
-p port: Specifies the UDP port number of the destination device, in the range 1 to
65535. The default value is 33434. You do not need to modify this parameter.
-q packet-number: Specifies the number of probe packets sent each time, in the
range 1 to 65535. The default value is 3.
-vpn-instance vpn-instance-name: Specifies the name of an MPLS VPN instance,
which is a string of 1 to 31 characters.
-w timeout: Specifies the packet timeout time, in the range 1 to 65535, in
milliseconds. The default value is 5000 ms.
remote-system: IP address or host name (a string of 1 to 20 characters) of the
destination device.
Description Use the
tracert command to trace the routers the packets traverse from the
source to the destination device.
After having identified network failure with the ping command, you can use the
tracert command to determine the failed node(s).
Output information of the tracert command includes IP addresses of all the
routers the packets traverse from the source to the destination device. If a router
times out, “* * *” will be displayed.
Example # Display the routers the packets traverse from the current device, with an IP
address of 8.26.0.115, to the destination device.
<Sysname> tracert 18.26.0.115
traceroute to 18.26.0.115(18.26.0.115) 30 hops max,40 bytes packet,