ITEM: BC5564L

HOWTO AIX: How to set the ATM Alternate MAC Address

QUESTION:
I'm running AIX V 4.1.4 and am trying to set an Alternate ATM
address on my Turboways 100 ATM adapter.  In SMIT, I select the
adapter, enter the MAC address, but when it executes, I get 
the message:

  Method error (/etc/methods/chgatm): 
     
       0514-017 The following attributes are not valid for the
       specified device: 
                                       
       AltMacAddr   ALTERNATE ATM MAC address (12 hex digits)

I've tried everything I can think of, but I can't seem to get
past this message.  What am I doing wrong?

ANSWER:
To set the alternate MAC address you must:

 1. Stop all applications using ATM -- otherwise you will get 
    a "device busy" message. 
    Today, the only application is TCP/IP.  Use SMIT to either
    "detach" or "remove" all at\# interfaces. 
                                          
 2. In SMIT, an address of 123456123456 is set as follows:   
      Enable Alternate MAC Address                yes 
      Alternate ATM MAC Address (12 hex digits)   0x123456123456
    It is not intuitive, but you must precede it with a "0x" in
    AIX 4.1.4.  This has always been true with adapters like
    Ethernet and T-R, but you didn't do it with the old
    Turboways 100 driver for AIX V 3.2.
                                                                
 3. Reboot the system.  The change will not take effect until
    you do this. 

The following commands are handy for checking the MAC address 
values: 
  - the "lscfg -l atm0 -v" always reports the burned in address.
    (For AIX V 3.2.5, use "lscfg -l atmaio0 -v") 

  - with AIX 4.1, the "netstat -i" command reports the current
    hardware address for ALL TCP/IP interfaces.  (This is a very
    convenient enhancement!)  If an Alternate Address has been 
    assigned, it will be displayed here -- otherwise it will 
    display be the real burned in address. 

I hope this helps! 




Support Line: HOWTO AIX: How to set the ATM Alternate MAC Address ITEM: BC5564L

Dated: December 1995 Category: N/A

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