Connectivity Guide

traceroute
Displays the routes that packets take to travel to an IP address.
Syntax
traceroute [vrf {management | vrf-name}] host [-46dFITnreAUDV] [-f first_ttl]
[-g gate,...] [-i device] [-m max_ttl] [-N squeries] [-p port] [-t tos] [-l
flow_label] [-w waittime] [-q nqueries] [-s src_addr] [-z sendwait] [--
fwmark=num] host [packetlen]
Parameters
• vrf management— (Optional) Traces the route to an IP address in the management VRF instance.
• vrf vrf-name — (Optional) Traces the route to an IP address in the specied VRF instance.
• host — Enter the host to trace packets from.
• -i interface — (Optional) Enter the IP address of the interface through which traceroute sends packets.
By default, the interface is selected according to the routing table.
• -m max_ttl — (Optional) Enter the maximum number of hops, the maximum time-to-live value, that
traceroute probes. The default is 30.
• -p port — (Optional) Enter a destination port:
– For UDP tracing, enter the destination port base that traceroute uses. The destination port number is
incremented by each probe.
– For Internet Control Message Protocol (ICMP) tracing, enter the initial ICMP sequence value, incremented
by each probe.
– For TCP tracing, enter the constant destination port to connect.
– -P protocol — (Optional) Use a raw packet of the specied protocol for traceroute. The default
protocol is 253 (RFC 3692).
– -s source_address — (Optional) Enter an alternative source address of one of the interfaces. By
default, the address of the outgoing interface is used.
– -q nqueries — (Optional) Enter the number of probe packets per hop. The default is 3.
– -N squeries — (Optional) Enter the number of probe packets sent out simultaneously to accelerate
traceroute. The default is 16.
– -t tos — (Optional) For IPv4, enter the type of service (ToS) and precedence values to use. 16 sets a
low delay; 8 sets a high throughput.
– -UL — (Optional) Use UDPLITE for tracerouting. The default port is 53.
– -w waittime — (Optional) Enter the time in seconds to wait for a response to a probe. The default is 5
seconds.
– -z sendwait — (Optional) Enter the minimal time interval to wait between probes. The default is 0. A
value greater than 10 species a number in milliseconds, otherwise it species a number of seconds. This
option is useful when routers rate-limit ICMP messages.
– --mtu — (Optional) Discovers the maximum transmission unit (MTU) from the path being traced.
– --back — (Optional) Prints the number of backward hops when dierent from the forward direction.
– host — (Required) Enter the name or IP address of the destination device.
– packet_len — (Optional) Enter the total size of the probing packet. The default is 60 bytes for IPv4 and
80 for IPv6.
Default
Not congured
Command Mode EXEC
Usage Information None
Example
OS10# traceroute www.dell.com
traceroute to www.dell.com (23.73.112.54), 30 hops max, 60 byte packets
1 10.11.97.254 (10.11.97.254) 4.298 ms 4.417 ms 4.398 ms
2 10.11.3.254 (10.11.3.254) 2.121 ms 2.326 ms 2.550 ms
Troubleshoot OS10 951