Traceroute - Cisco MDS 9000 series Command Reference Manual

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S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

traceroute

To print the route an IP packet takes to a network host, use the traceroute command in EXEC mode.

Syntax Description

size packet-size

Command Modes

Command History

Usage Guidelines

This command traces the route an IP packet follows to an Internet host by launching UDP probe packets

with a small TTL (time to live) and then listening for an ICMP (Internet Control Message Protocol) "time

exceeded" reply from a gateway.

Probes start with a TTL of one and increase by one until encountering an ICMP "port unreachable." This

means that the host was accessed or a maximum flag was found. A line is printed showing the TTL,

address of the gateway, and round-trip time of each probe. If the probe answers come from different

gateways, the address of each responding system is printed.

The following example prints the route IP packets take to the network host www.cisco.com.

switch# traceroute www.cisco.com

traceroute to www.cisco.com (171.71.181.19), 30 hops max, 38 byte packets

OL-8413-07, Cisco MDS SAN-OS Release 3.x

traceroute [ipv6] [hostname [size packet-size] | ip-address] | hostname | ip-address]

Traces a route to an IPv6 destination.

Specifies a host name. Maximum length is 64 characters.

Specifies a packet size. The range is 0 to 64.

Specifies an IP address.

Modification

This command was introduced.

Added the ipv6 argument.

kingfisher1-92.cisco.com (172.22.92.2)

nubulab-gw1-bldg6.cisco.com (171.71.20.130)

172.24.109.185 (172.24.109.185)

sjc12-lab4-gw2.cisco.com (172.24.111.213)

sjc5-sbb4-gw1.cisco.com (171.71.241.174)

sjc12-dc2-gw2.cisco.com (171.71.241.230)

sjc12-dc2-cec-css1.cisco.com (171.71.181.5)

www.cisco.com (171.71.181.19)

Cisco MDS 9000 Family Command Reference