IT13608: PUREAPPLICATION SYSTEM IBM OS IMAGE FOR AIX SYSTEMS V2.1.3.0 DETECTING THE SIT0 INTERFACE AS PUBLIC INTERFACE VARIABLE

IBM PureApplication System Version 2.2.0.0

APAR status

• Closed as program error.

Error description

• Customer is reporting that after installing IBM OS AIX Image
  version 2.1.3.0, that the version 2.1.3.0 image has the sit0
  interface configured as a valid IPv4 address, however; it should
  be an IPv6 address.
  
  Example:
  OS AIX Image 2.1.3.0:
  # ifconfig -a
  en0:
  flags=1e084863,480<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTI
  CAST,GRO
  UPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),CHAIN>
          inet6 xxxx:xxxx:xxxx:xx:xxxx:xxxx:xxxx:xxxx/xx
          inet6 xxxx::xxxx:xxxx:xxxx:xxxx/xx
           tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1
  en1:
  flags=1e084863,4c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTI
  CAST,GRO
  UPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),LARGESEND,CHAIN>
          inet xx.xxx.xx.xxxx netmask 0xffffff00 broadcast
  xx.xxx.xxx.xxx
           tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1
  sit0: flags=8100041<UP,RUNNING,LINK0>
          inet6 ::xx.xxx.xx.xxx/xx
  lo0:
  flags=e08084b,c0<UP,BROADCAST,LOOPBACK,RUNNING,SIMPLEX,MULTICAST
  ,GROUPRT
  ,64BIT,LARGESEND,CHAIN>
          inet xxx.x.x.x netmask 0xff000000 broadcast
  xxx.xxx.xxx.xxx
          inet6 ::1%1/128
           tcp_sendspace 131072 tcp_recvspace 131072 rfc1323 1
  The customer reported this problem after attempting to install
  IBM Patterns and from the standard.out file the customer was
  able to see the interface was not getting configured properly
  and was choosing the public_interface variable value sit0. The
  pattern detects the sit0 interface as public interface,
  however; it should find the en1 interface.
  ######################################
  Getting public interface name
  ######################################
  Public interface name: sit0
  ######################################
  Getting gateway ip for use as quorum device
  ######################################
  Gateway IP:
  Validating ip address ->
  Error: Empty IP address!
  

Local fix

• Customers can try the following to see if autoconf6 -6 will
  skip creating tunnel interface
  in the customer environment.
  
  The original autoconf6 command without -6 does not create sit0
  interface in the IBM test environment.
  
  1. open /etc/rc.tcpip and comment out the following line
     start /usr/sbin/autoconf6 "" " -Ri en0 "
  
  2. reboot the VM
     shutdown -r now
  
  3. run the following command when VM is up
    /usr/sbin/autoconf6 -6 -Ri eth0
  
  4. run ifconfig -a to see if sit0 is present or not.
  
  If autoconf6 -6 does not create sit0 interface,  the customer
  can create a new image using the following:
  
  1. extend the image
  
  2. logon the extended instance,  then open
  /opt/IBM/AE/AS/vmc-net-interface/dmtf_network_bringup
     search "acopt=",  it should return 2 lines.
     replace acopt="-i"  with acopt="-6 -i"
     replace acopt="-Ri" with acopt="-6 -Ri"
  
  3. capture the image
  In the new deployment,  autoconf6 should have -6 option defined
  in rc.tcpip.
  

Problem summary

• The sit0 interface was being configured in error.
  

Problem conclusion

• A code fix is being provided in PureApplication System
  version 2.2.0.0 in the IBM OS Image for AIX Systems version
  2.1.5.0 and version 1.1.5.0.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  PAPP SYS 8278 P

• Fixed component ID

  5725F4600

Applicable component levels

• R220 PSY

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