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Configuring and Administering Oracle Solaris 11.1 Networks     Oracle Solaris 11.1 Information Library
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Document Information


1.  Planning the Network Deployment

2.  Considerations When Using IPv6 Addresses

3.  Configuring an IPv4 Network

4.  Enabling IPv6 on the Network

5.  Administering a TCP/IP Network

Major TCP/IP Administrative Tasks (Task Map)

Monitoring Network Status With the netstat Command

How to Display Statistics by Protocol

How to Display the Status of Transport Protocols

How to Display Network Interface Status

How to Display the Status of Sockets

How to Display the Status of Transmissions for Packets of a Specific Address Type

How to Display the Status of Known Routes

Probing Remote Hosts With the ping Command

How to Determine if a Remote Host Is Running

How to Determine if a Host Is Dropping Packets

Administering and Logging Network Status Displays

How to Control the Display Output of IP-Related Commands

How to Log Actions of the IPv4 Routing Daemon

How to Trace the Activities of the IPv6 Neighbor Discovery Daemon

Displaying Routing Information With the traceroute Command

How to Find Out the Route to a Remote Host

How to Trace All Routes

Monitoring Packet Transfers With the snoop Command

How to Check Packets From All Interfaces

How to Capture snoop Output Into a File

How to Check Packets Between an IPv4 Server and a Client

How to Monitor IPv6 Network Traffic

Monitoring Packets by Using IP Layer Devices

How to Check Packets on the IP Layer

Examples of Checking Packets

Administering Default Address Selection

How to Administer the IPv6 Address Selection Policy Table

How to Modify the IPv6 Address Selection Table for the Current Session Only

6.  Configuring IP Tunnels

7.  IPv4 Reference

8.  IPv6 Reference


Displaying Routing Information With the traceroute Command

The traceroute command traces the route an IP packet follows to a remote system. For technical details about traceroute, see the traceroute(1M) man page.

You use the traceroute command to uncover any routing misconfiguration and routing path failures. If a particular host is unreachable, you can use traceroute to see what path the packet follows to the remote host and where possible failures might occur.

The traceroute command also displays the round trip time for each gateway along the path to the target host. This information can be useful for analyzing where traffic is slow between the two hosts.

How to Find Out the Route to a Remote Host

Example 5-13 Using the traceroute Command to Show the Route to a Remote Host

The following output from the traceroute command shows the seven–hop path a packet follows from the local system nearhost to the remote system farhost. The output also shows the times for a packet to traverse each hop.

istanbul% traceroute
    traceroute to (, 30 hops max, 40 byte packets
     1  frbldg7c-86 (  1.516 ms  1.283 ms  1.362 ms
     2  bldg1a-001 (  2.277 ms  1.773 ms  2.186 ms
     3  bldg4-bldg1 (  1.978 ms  1.986 ms  13.996 ms
     4  bldg6-bldg4 (  2.655 ms  3.042 ms  2.344 ms
     5  ferbldg11a-001 (  2.636 ms  3.432 ms  3.830 ms
     6  frbldg12b-153 (  3.452 ms  3.146 ms  2.962 ms
     7  sanfrancisco (  3.430 ms  3.312 ms  3.451 ms

How to Trace All Routes

This procedure uses the -a option of the traceroute command to trace all routes.

Example 5-14 Tracing All Routes to a Dual-Stack Host

This example shows all possible routes to a dual-stack host.

% traceroute -a
traceroute: Warning: Multiple interfaces found; using 2::56:a0:a8 @ eri0:2
traceroute to v6host (2001:db8:4a3b::102:a00:fe79:19b0),30 hops max, 60 byte packets
 1  v6-rout86 (2001:db8:4a3b:56:a00:fe1f:59a1)  35.534 ms  56.998 ms * 
 2  2001:db8::255:0:c0a8:717  32.659 ms  39.444 ms *
 3  farhost.faraway.COM (2001:db8:4a3b::103:a00:fe9a:ce7b)  401.518 ms  7.143 ms *
 4 (2001:db8:4a3b::100:a00:fe7c:cf35)  113.034 ms  7.949 ms *
 5  v6host (2001:db8:4a3b::102:a00:fe79:19b0)  66.111 ms *  36.965 ms

traceroute to  (,30 hops max,40 byte packets
 1  v6-rout86 (  4.360 ms  3.452 ms  3.479 ms
 2 (  4.062 ms  3.848 ms  3.505 ms
 3 (  4.773 ms *  4.294 ms
 4 (  5.128 ms  5.362 ms *
 5  v6host  (  7.298 ms  5.444 ms *