AIX Servers in LVS/DR and LVS/TUN Clusters

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Revision as of 11:16, 11 April 2010 by Bmontarges (Talk | contribs) (→‎Disable ARP for VIP)

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Introduction

In the AIX operating systems, ip addresses configured on the loopback interface will not participate the ARP protocol. Tested ok on AIX 6.1, sould works from AIX 5L

Disable ARP for VIP

Background : It is possible to disable arp on a real interface via noarp option. If a real interface is set up with arp on, you cannot add a inet alias on it whitout arp reply. The AIX "Virtual IP Address Interface" implementation allow you to add a virtual interface (not an alias) that is not arp-able


In LVS/DR clusters, we can disable ARP for VIP on AIX as follows: 

smitty inet
select "Add de Virtual IP Address Interface"
under setup screen, specify,
address : VIP/32 (dotted decimal)
netmask : 255.255.255.255 
interface name : vi1 (or what you want)
activate interface : yes
interface to attach: lo0 (real one, select the loopback, smitty failed to attach other interface, an etherchannel in my case)


I made this quickly yesterday so i didn't took any notes or screens, I wrote the section from head. think ODM should be updated for persistence after reboot. didn't restart the system yet. will confirm soon. will also update the post with real smit screens and corresponding cmd lines.

That(s it. Sorry for wiki style or bad english. I work on it too...

--Baptiste Montarges 01:58, 11 April 2010 (CST)

References

  • IBM documentation on Virtual Ethernet Interface on AIX
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