Maipu Administration Guide

Traceroute Function

The traceroute function is used to view the gateways passed by the packet from the source to the destination. It is mainly used to check whether the destination is reachable and analyze the faulty network node. The executing process of traceroute is: First send one IP packet with TTL 1 to the destination host; the first-hop gateway drops the packet and returns one ICMP timeout error packet. In this way, traceroute gets the first gateway address in the path. And then traceroute sends one packet with TTL 2. In this way, get the address of the second-hop gateway. Continue the process until reaching the destination host. The UDP port number of the traceroute packet is the port number of the destination that cannot be used by any application program. After the destination receives the packet, return one error packet of the port unreachable. In this way, get all gateway addresses on the path.

Configuration Condition

None

Traceroute

Table 1-5 traceroute

Step	Command	Description
View the gateways passed by the packet from the source to the destination	traceroute [vrf vrf-name ] {{ip host-name \| ip-address} \| {ipv6 host-name \| ipv6-address} \| host-name \| ip-address \| ipv6-address } [ -f start-ttl] [ -w wait-time] [ -m max-ttl]	Mandatory

Interactive traceroute

Table 1-6 Interactive traceroute

Step	Command	Description
Enter the traceroute interactive mode	traceroute [ vrf vrf-name ]	Mandatory In the privileged user mode, execute the command to enter the traceroute interactive mode.
Configure the network protocol type	Protocol [ ip ]:[ ip \| ipv6]	Optional By default, Use the IPv4 protocol.
Configure the destination IP address or host name	Target IP address or hostname:{ ip-address \| host-name }	Mandatory
Configure the source IP address or egress interface of the traceroute packet	Source address or interface:{ ip- address \| interface-name }	Optional By default, do not specify the source IP address or egress interface of the packet
Configure the timeout for waiting for each detection packet response	Timeout in seconds [3]: timeout	Optional By default, time out after 3s.
Configure the times of sending the detection packet with the same TTL value	Probe count [3]: probe-count	Optional By default, send for three times.
Configure the minimum TTL value of the detection packet	Minimum Time to Live [1]:min-ttl	Optional By default, the minimum TTL value is 1.
Configure the maximum TTL value of the detection packet	Maximum Time to Live [30]:max- ttl	Optional By default, the maximum TTL value is 30.
Configure the destination UDP port number of the detection packet	Port Number [33434]:port-number	Optional By default, the destination port number is 33434.
Configure the extended option, loose source route option, strict source route option, record route, record timestamp, display details	Loose, Strict, Record, Timestamp, Verbose[ none ]:[ l \| s ] [ r / t / v ]	Optional, only IPv4 protocol supports the command. By default, do not configure the option.

Traceroute Function

Configuration Condition

Traceroute

Interactive traceroute

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