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59.4 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.
59.5 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 startup-config
Display the switch parameter configuration written in the
Flash Memory at current operation state, which is normally
the configuration file applied in next time the switch starts
Summary of Contents for QSW-2800 series
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