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Message-ID: <c2213f680703282013y4830bd32j1e70833bb83bdb7f@mail.gmail.com>
Date: Wed, 28 Mar 2007 22:13:37 -0500
From: "Alex Gorbachev" <gorbyx@gmail.com>
To: naqimirza@yahoo.com
Subject: Re: Oracle 10gR2 RAC VIP Question
Cc: oracle-l@freelists.org
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Reply-to: gorbyx@gmail.com

It doesn't matter. You can actually have more than one VIP (User VIPs).

On 3/27/07, Naqi Mirza <naqimirza@yahoo.com> wrote:
>
> Hi,
> I have a 2 node 10gR2 (10.2.0.2) Installation running on HP-UX (PA-RISC) 64
> Bit, 11.23. HP Serviceguard Extensions for RAC (11.17) is also installed.
> .
> Due to maintenance both nodes were brought down. One they were brought up, I
> noticed that the vip for one node - node2, was running on interface lan0:2.
> lan0 is our public interface. Now typically, the vip runs on lan0:1. When a
> node is evicted from the cluster, the vip of the evicted node gets relocated
> from lan0:1 on the evicted node to lan0:2 on the surviving node.
> My question basically is, does it matter which logical interface
> (:1,:2,:3,:4,etc) the vip runs on for any node - be it the evicted node, or
> the surviving (master) node. Essentially the mapping for the vip is defined
> in the OCR and the /etc/hosts file. There is no mention of whether this
> should run on :1,:2,:3,:4,etc - only that it should be on the public
> interface - lan0 - which it is.
> A look into the ocr file, and this is all i can find:
> .
> [SYSTEM.css.interfaces.global.lan0.172|d25|d3|d0.1]
> .
> Not sure what d0.1 means?, the first three segments are those for the public
> network. .1 = :1 = lan0:1 ??
> That said, whenever I have seen a relocation of the vip take place it goes
> to lan0:2 - However as mentioned earlier, lan0:2 is already in use by one of
> the nodes, if a relocation to this node were to take place would the the vip
> come up here as lan0:3 - unfortunately I can't test this out yet, but was
> wondering if anyone had an idea on this?
> Thanks
>
> Naqi
>
>  ________________________________
>  The all-new Yahoo! Mail goes wherever you go - free your email address from
> your Internet provider.


-- 
Best regards,
Alex Gorbachev

http://www.oracloid.com
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