Re: RAC private network IP's - 169.254.x.x
- From: "Radoulov, Dimitre" <cichomitiko@xxxxxxxxx>
- To: "krishna.setwin@xxxxxxxxx" <krishna.setwin@xxxxxxxxx>
- Date: Fri, 06 Apr 2012 10:10:44 +0200
Hi Krishna,
as already stated, the 169.254.*.* is used by GI automatically:
11gR2 Grid Infrastructure Redundant Interconnect and
ora.cluster_interconnect.haip [ID 1210883.1]
Grid automatically picks free link local addresses from reserved
169.254.*.* subnet for HAIP. According to RFC-3927, link local subnet
169.254.*.* should not be used for any other purpose. With HAIP, by
default, interconnect traffic will be load balanced across all active
interconnect interfaces, and corresponding HAIP address will be failed
over transparently to other adapters if one fails or becomes
non-communicative. .
Dimitre
On 06/04/2012 09:57, D'Hooge Freek wrote:
> I think the 169.254.0.0/16 subnet is used for autoconfiguration ip addresses.
> Which are addresses that are self assigned after verifying that no one else
> is using it by sending out an arp ping (for instance, in case when the dhcp
> server is not giving out an address).
>
> You should not use them when statistically assigning an ip address.
>
> Oracle is using ip addresses in this range for the private network as part of
> the high available ip address (HAIP) functionality (which is also the reason
> multicast's must be allowed between the different nodes).
>
[...]
> Can we use 169.254.1.11& 169.254.1.12 as private IP's for RAC 2 node
> cluster?
> (basically any 169.254.x.x )
>
> we just have 1 private NIC for each node.
>
> version: 11.2.0.3 rac
> RHEL 5.8
>
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