CUPS, AIX, and IPv6 - an FYI

[angelb]

For those running CUPS in AIX environment, if you're not already aware,
AIX by default, uses IPv6. I'm not sure when IBM made this change but
it's effective in 5.2.

Disabling IPv6 in AIX resolves the response time delay by eliminating
the need for the request to move too high up the DNS chain for resolution and speed up the request to the next available server should
the first DNS server is non-responsive.

The result -

>From this: (IPv6 enabled and first DNS server down)

     # timex lpr -Pricoh ti01-1.txt
     real 113.72
     user 0.57
     sys  0.02


To this: (IPv6 disabled and first DNS server down)

    # timex lpr -Pricoh ti01-1.txt
    real 3.67
    user 0.58
    sys  0.03


The change- /etc/netsvc.conf

	from: hosts=local,bind

	  to: hosts=local,bind4

In fact, to disable IPV6, you can put any (alpha/num)characters after
the word "bind" except for the number "6", and it will resolve to IPV4.

No downtime or refresh of any kind is required. Immediate performance
increase.

Thanks,
Angel