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System Administration Guide: IP Services

ProcedureHow to Display the Status of Known Routes

The -r option of the netstat command displays the routing table for the local host. This table shows the status of all routes that the host knows about. You can run this option of netstat from your user account.

  1. Display the IP routing table.


    $ netstat -r
Example 8–12 Routing Table Output by the netstat Command

The following example shows output from the netstat -r command.


Routing Table: IPv4
  Destination           Gateway           Flags  Ref   Use   Interface
-------------------- -------------------- ----- ----- ------ ---------
host15               myhost               U         1  31059  hme0
10.0.0.14            myhost               U         1      0  hme0
default              distantrouter        UG        1      2  hme0
localhost            localhost            UH        42019361  lo0

Routing Table: IPv6
  Destination/Mask            Gateway                   Flags Ref   Use   If  
--------------------------- --------------------------- ----- --- ------ -----
2002:0a00:3010:2::/64    2002:0a00:3010:2:1b2b:3c4c:5e6e:abcd U  1      0 hme0:1
fe80::/10                fe80::1a2b:3c4d:5e6f:12a2    U       1     23 hme0 
ff00::/8                 fe80::1a2b:3c4d:5e6f:12a2    U       1      0 hme0 
default                  fe80::1a2b:3c4d:5e6f:12a2    UG      1      0 hme0 
localhost                localhost                   UH      9  21832 lo0

The following table describes the meaning of the various parameters of the screen output of the netstat —r command.

Parameter 

Description 

Destination

Destination/Mask

Specifies the host that is the destination endpoint of the route. Note that the IPv6 routing table shows the prefix for a 6to4 tunnel endpoint (2002:0a00:3010:2::/64) as the route destination endpoint.

Gateway

Specifies the gateway to use for forwarding packets. 

Flags

Indicates the current status of the route. The U flag indicates that the route is up. The G flag indicates that the route is to a gateway.

Use

Shows the number of packets sent. 

Interface

Indicates the particular interface on the local host that is the source endpoint of the transmission.