AIX: Configuring a network interface

AIX: Configuring a network interface

# Tested on AIX 6.1

# Given following interface (no matter if it is already configured or not):

ifconfig en3
   en3: flags=1e080822,480<BROADCAST,NOTRAILERS,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),CHAIN>

# or

ifconfig en3
   en3: flags=1e084863,480<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),CHAIN>
           inet 192.165.32.181 netmask 0xfffffffc broadcast 192.165.33.255
           tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1


# I'd like to set its address IP to 192.168.32.181, netmask 255.255.255.252, for instance


# Either I use 'smitty' interface:

smitty mktcpip

   1.- Select network interface to modify

       ┌──────────────────────────────────────────────────────────────────────────┐
       │                       Available Network Interfaces                       │
       │                                                                          │
       │ Move cursor to desired item and press Enter.                             │
       │                                                                          │
       │   en0      Standard Ethernet Network Interface                           │
       │   en1      Standard Ethernet Network Interface                           │
       │   en2      Standard Ethernet Network Interface                           │
   ==> │   en3      Standard Ethernet Network Interface                           │
       │   et0      IEEE 802.3 Ethernet Network Interface                         │
       │   et1      IEEE 802.3 Ethernet Network Interface                         │
       │   et2      IEEE 802.3 Ethernet Network Interface                         │
       │   et3      IEEE 802.3 Ethernet Network Interface                         │
       │                                                                          │
       │ F1=Help                 F2=Refresh              F3=Cancel                │
       │ F8=Image                F10=Exit                Enter=Do                 │
       │ /=Find                  n=Find Next                                      │
       └──────────────────────────────────────────────────────────────────────────┘


   2.- Note that default values for DNS server, domain and gateway, if globally set, are already
       set in following screen. They are set or not, we may change them, as well as the
       rest of parameters:

   Type or select values in entry fields.
   Press Enter AFTER making all desired changes.

                                                        [Entry Fields]
   * HOSTNAME                                           [myhostname]
   * Internet ADDRESS (dotted decimal)                  [192.168.32.181]         <----
     Network MASK (dotted decimal)                      [255.255.255.252]        <----
   * Network INTERFACE                                   en3
     NAMESERVER
              Internet ADDRESS (dotted decimal)         [10.11.16.382]           <---- opt.
              DOMAIN Name                               [mydomain.mycompany.es]  <---- opt.
     Default Gateway
          Address (dotted decimal or symbolic name)     [10.148.656.267]         <---- opt.
          Cost                                          [0]
          Do Active Dead Gateway Detection?              no
     Your CABLE Type                                     N/A
     START TCP/IP daemons Now                            no


   3.- Press enter to confirm changes

   Command: OK            stdout: yes           stderr: no

   Before command completion, additional instructions may appear below.

   en3
   x64lmwbikr5
   inet0 changed
   en3 changed
   inet0 changed




# or I run following command:

mktcpip -h x64lmwbikr5 -a 192.165.32.181 -m 255.255.255.252 -i en3

# Optionally, I could have used '-n', '-d' or '-g' to modify DNS server, domain or gateway if needed:

mktcpip -h myhostname -a 192.168.32.181 -m 255.255.255.252 -i en3 -n 10.11.16.382 -d mydomain.mycompany.es -g 10.148.656.267


# Check:

ifconfig en3
en3: flags=1e084863,480<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),CHAIN>
        inet 192.165.32.181 netmask 0xfffffffc broadcast 192.165.32.183
         tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1
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