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How to check the current network configuration
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How to check the current network configuration

Here is a list of useful command that can be used to obtained current network configuration status.

Contents

How to found the IP address of the network card assigned to system host?

# nsquery hosts $(hostname) | grep Address
Address: 16.90.48.75

How to check the available network cards?

# ioscan -fnkC lan
Class     I  H/W Path     Driver S/W State   H/W Type     Description
======================================================================
lan       0  0/1/2/0      iether   CLAIMED     INTERFACE    HP AB352-60001 PCI/PCI-X 1000Base-T Dual-port Core
lan       1  0/1/2/1      iether   CLAIMED     INTERFACE    HP AB352-60001 PCI/PCI-X 1000Base-T Dual-port Core
lan       2  0/4/1/0/6/0  igelan   CLAIMED     INTERFACE    HP A9784-60002 PCI/PCI-X 1000Base-T FC/GigE Combo Adapter

How to display LAN device configuration and status?

# lanscan
Hardware    Station        Crd Hdw   Net-Interface  NM  MAC       HP-DLPI DLPI
Path        Address        In# State NamePPA        ID  Type      Support Mjr#
0/1/2/0     0x00156004A2FA 0   UP    lan0 snap0     1   ETHER     Yes     119
0/1/2/1     0x00156004A2FB 1   UP    lan1 snap1     2   ETHER     Yes     119
0/4/1/0/6/0 0x0016353E5012 2   UP    lan2 snap2     3   ETHER     Yes     119

How to determine the current IP Addresses?

# netstat -in
Name      Mtu  Network         Address         Ipkts              Ierrs Opkts              Oerrs Coll
lan0      1500 16.90.48.0      16.90.48.75     61923              0     22284              0     0
lo0      32808 127.0.0.0       127.0.0.1       51973              0     51973              0     0

or

for ppa in `lanscan -p`
do
printf "%s: " lan$ppa
ifconfig lan$ppa 2> /dev/null | awk '$0 ~ /inet/ {printf "%s/%s", $2, $4}'
echo
done

Example:

lan0: 16.90.48.75/fffffc00
lan1:
lan2:

How to display the current routing table?

# netstat -rn
Routing tables
Destination           Gateway            Flags Refs Interface  Pmtu
127.0.0.1             127.0.0.1          UH    0    lo0       32808
16.90.48.75           16.90.48.75        UH    0    lan0      32808
16.90.48.0            16.90.48.75        U     2    lan0       1500
127.0.0.0             127.0.0.1          U     0    lo0       32808
default               16.90.48.1         UG    0    lan0       1500
This page was last modified on 23 May 2008, at 22:53. This page has been accessed 1,138 times.