User's Manual

Configuration Guide of XGS-5240-Series
71-4
Traceroute Options and explanations of the parameters of the Traceroute command
please refer to traceroute command chapter in the command manual.
71.4 Traceroute6
The Traceroute6 function is used on testing the gateways passed through by the d
ata packets from the source equipment to the destination equipment, to verify the acce
ssibility and locate the network failure. The principle of the Traceroute6 under IPv6 is t
he 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, destinatio
n 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 pack
et and the IPv6 address of the router). Upon receiving this message, the Traceroute6 s
ends another datagram of which the HOPLIMIT is increased to 2 so to discover the se
cond router. Plus 1 to the HOPLIMIT every time to discover another router, the Tracero
ute6 repeat this action till certain datagram reaches the destination.
Traceroute6 Options and explanations of the parameters of the Traceroute6 comma
nd please refer to traceroute6 command chapter in the command manual.
71.5 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, ot
her 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 f
lash.
show history
Display the recent user input history comman
d.