System Debugging Commands; Debugging - H3C SR6600 Command Reference Manual

-vpn-instance vpn-instance-name: Specifies the MPLS L3VPN to which the destination belongs, where
vpn-instance-name is a case-sensitive string of 1 to 31 characters. If the destination is on the public
network, do not specify this option.
-w timeout: Specifies the timeout time of the reply packet of a probe packet, which ranges from 1 to
65535 milliseconds and defaults to 5000 milliseconds.
host: IPv6 address or host name of the destination, which is a string of 1 to 46 characters.
Usage guidelines
In the event of network failure, you can use the tracert command to determine the failed nodes.
Output from the tracert ipv6 command includes IPv6 addresses of all the Layer 3 devices the packets
traverse from source to destination. Asterisks (* * *) are displayed if the device cannot reply with an
ICMP error message (probably because the destination is unreachable or sending ICMP
timeout/destination unreachable packets is disabled).
To abort the tracert operation during the execution of the command, press Ctrl+C.
Examples
# View the path the packets traverse from source to destination with IPv6 address 2001::1.
<Sysname> tracert ipv6 2001::1
traceroute to 2001::1
1 2001::1 3 ms <1 ms 19 ms
# View the path the packets traverse from source to destination with IPv6 address 2001::1 in VPN 1.
<Sysname> tracert ipv6 –vpn-instance vpn1 2001::1
traceroute to 2001::1
1 2001::1 3 ms <1 ms 19 ms
For description on the fields in the above output, see

System debugging commands

debugging

Use debugging to enable the debugging of a specific module.
Use undo debugging to disable the debugging of a specific module.
Syntax
debugging { all [ timeout time ] | module-name [ option ] }
undo debugging { all | module-name [ option ] }
Default
Debugging functions for all modules are disabled.
Views
User view
Default command level
3: System level
30 hops max,60 bytes packet, press CTRL_C to break
30 hops max,60 bytes packet, press CTRL_C to break
10
Table 2.