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Full Discussion: Ifconfig Flags
Top Forums UNIX for Dummies Questions & Answers Ifconfig Flags Post 302568486 by wthomas on Thursday 27th of October 2011 11:46:42 AM
Old 10-27-2011
Ifconfig Flags
Hi there,

I need your help in understanding the below Solaris 10 ifconfig output;
Code:
 athnetspns02>ifconfig -a
  
  lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
          inet 127.0.0.1 netmask ff000000
  e1000g0: flags=19040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER,FAILED> mtu 1500 index 2
          inet 165.34.218.180 netmask ffffffc0 broadcast 165.34.218.191
          groupname production
          ether 0:14:4f:cb:71:5e
  e1000g1: flags=29040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER,STANDBY> mtu 1500 index 3
          inet 165.34.218.181 netmask ffffffc0 broadcast 165.34.218.191
          groupname production
          ether 0:14:4f:cb:71:5f
  e1000g1:1: flags=21000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,STANDBY> mtu 1500 index 3
          inet 165.34.218.131 netmask ffffffc0 broadcast 165.34.218.191


I have a few questions;

1. The three interfaces; e1000g0, e1000g1, e1000g1:1 - am I right in thinking that there is two physical interfaces and one sub-interface - e1000g1:1 ?

2. The current production IP is 165.34.218.131 on e1000g1:1, but we had a recent problem and I think that the IP has failed over somehow from e1000g0 to e1000g1:1, but not sure as I'm not familiar with this server and don't know what it was before the issue. Can anyone shed some light on this?

3. Please can someone explain the meaning of the highlighted flags for interface e1000g1:1 ? Currently we cannot ping the e1000g0 interface even though it says Up and Running, but it say's Deprecated and Failed, so does this mean there is a problem with it, and should I bounce it to see if it comes back ok?

Regards, Wynford
Last edited by vbe; 10-27-2011 at 01:12 PM.. Reason: code tags please not colours!!!
 

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LEARN ABOUT X11R4

inet_type

inet_type(4)                                                       File Formats                                                       inet_type(4)

NAME

       inet_type - default Internet protocol type

SYNOPSIS

       /etc/default/inet_type

DESCRIPTION

       The inet_type file defines the default IP protocol to use. Currently this file is only used by the ifconfig(1M) and netstat(1M) commands.

       The  inet_type  file  can  contain  a  number of <variable>=<value> lines. Currently, the only variable defined is DEFAULT_IP, which can be
       assigned a value of IP_VERSION4, IP_VERSION6, or BOTH.

       The output displayed by the ifconfig and netstat commands can be controlled by the value of DEFAULT_IP set in inet_type file.  By  default,
       both commands display the IPv4 and IPv6 information available on the system. The user can choose to suppress display of IPv6 information by
       setting the value of DEFAULT_IP.  The following shows the possible values for DEFAULT_IP and the resulting ifconfig and netstat output that
       will be displayed:

       IP_VERSION4     Displays only IPv4 related information. The output displayed is backward compatible with older versions of the ifconfig(1M)
                       and netstat(1M) commands.

       IP_VERSION6     Displays both IPv4 and IPv6 related information for ifconfig and netstat.

       BOTH            Displays both IPv4 and IPv6 related information for ifconfig and netstat.

       The command-line options to the ifconfig and netstat commands override the effect of DEFAULT_IP as set in the inet_type file. For  example,
       even if the value of DEFAULT_IP is IP_VERSION4, the command

       example% ifconfig -a6

       will display all IPv6 interfaces.

EXAMPLES

       Example 1: Suppressing IPv6 Related Output

       This is what the inet_type file must contain if you want to suppress IPv6 related output:

       DEFAULT_IP=IP_VERSION4

SEE ALSO

       ifconfig(1M), netstat(1M)

SunOS 5.10                                                          16 Jun 1999                                                       inet_type(4)
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