SNR S2940-8G-v2 Switch Configuration Guide
Monitor and Debug
Traceroute Options and explanations of the parameters of the Traceroute command please
refer to traceroute command chapter in the command manual.
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 cur-
rent operation state.
show running-config current-
mode
Show the configuration under the current mode.
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
up.
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General