PLANET WGSW-52040 - Manual (Page 496)

66-67
66.4 Traceroute6
The Traceroute6 function is used on testing the gateways passed through by the data packets from the source
equipment to the destination equipment, to verify the accessibility and locate the network failure. The principle
of the Traceroute6 under IPv6 is the same as that under IPv4, which adopts the hop limit field of the ICMPv6
and IPv6 header. First, Traceroute6 sends an IPv6 datagram (including source address, destination address
and packet sent time) whose HOPLIMIT is set to 1. When first route on the path receives this datagram, it
minus the HOPLIMIT by 1 and the HOPLIMIT is now 0. So the router will discard this datagram and returns
with a 「ICMPv6 time exceeded」 message (including the source address of the IPv6 packet, all content in the
IPv6 packet and the IPv6 address of the router). Upon receiving this message, the Traceroute6 sends another
datagram of which the HOPLIMIT is increased to 2 so to discover the second router. Plus 1 to the HOPLIMIT
every time to discover another router, the Traceroute6 repeat this action till certain datagram reaches the
destination.
Traceroute6 Options and explanations of the parameters of the Traceroute6 command please refer to
traceroute6 command chapter in the command manual.
66.5 Show
show command is used to display information about the system, port and protocol operation. This part
introduces the show command that displays system information, other show commands will be discussed in
other chapters.
Command Explanation
Admin Mode
show debugging Display the debugging state.
show flash Display the files and the sizes saved in the flash.
show history Display the recent user input history command.
show history all-users [detail]
Show the recent command history of all users.
Use clear history all-users command to clear
the command history of all users saved by the
system, the max history number can be set by
history all-users max-length command.
show memory Display content in specified memory area.
show running-config
Display the switch parameter configuration
validating at current operation state.
show running-config current-mode Show the configuration under the current mode.