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Example 1:
Requirement: Enable SSH server on the switch, and run SSH2.0 client software
such as Secure shell client and putty on the terminal. Log on the switch by using the
username and password from the client.
Configure the IP address, add SSH user and enable SSH service on the switch.
SSH2.0 client can log on the switch by using the username and password to configure
the switch.
Switch(Config)#interface vlan 1
Switch(Config-Vlan-1)#ip address 100.100.100.200 255.255.255.0
Switch(Config-Vlan-1)#exit
Switch(Config)#ssh-user test password 0 test
Switch(Config)#ssh-server enable
2.2.5 Traceroute
Trace route command is for testing the gateways through which the data packets
travels from the source device to the destination device, so to check the network
accessibility and locate the network failure.
Execution procedure of the Trace route command consists of: first a data packet with
TTL at 1 is sent to the destination address, if the first hop returns an ICMP error message
to inform this packet can not be sent (due to TTL timeout), a data packet with TTL at 2 will
be sent. Also the send hop may be a TTL timeout return, but the procedure will carries on
till the data packet is sent to its destination. These procedures is for recording every
source address which returned ICMP TTL timeout message, so to describe a path the IP
data packets traveled to reach the destination
2.2.6 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
