Thank you very much Martin.
We found additional information on the multicast requirement at the
following link:
http://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/UCS_CVDs/cisco_ucs_oracle_rac.html#wp439295
Kindest regards,
Iggy
--
Iggy Fernandez
Email: iggy_fernandez@xxxxxxxxxxx <mailto:iggy_fernandez@xxxxxxxxxxx>
Cellphone: (925) 478 3161
Blog: So Many Manuals So Little Time
<http://iggyfernandez.wordpress.com/>
Author of Beginning Oracle Database 11/g/ Administration
<http://books.google.com/books?id=pdSLnG66WQkC&printsec=frontcover#v=onepage&q&f=false>
Editor of the /NoCOUG Journal <http://bit.ly/rC2gRA>/
Lecturer at University of Washington Professional and Continuing
Education <http://www.pce.uw.edu/biography/ignatius-fernandez/>
------------------------------------------------------------------------
From: martin.a.berger@xxxxxxxxx
Date: Mon, 14 Apr 2014 20:46:39 +0200
Subject: Re: FW: Extended RAC and multicast
To: iggy_fernandez@xxxxxxxxxxx
CC: oracle-l@xxxxxxxxxxxxx; kulkarniravi@xxxxxxxxx
Iggy, Ravi,
from all my test I call multicast a requirement from 11.2.0.2 onwards.
Take care about the different Multicast networks possible in different
Patch-Sets!
As you are talking about VLAN_S_ - I'd not do anything than pure
switched private network. Everything else will lead to troubles sooner
or later.
My .02€
Martin
On Mon, Apr 14, 2014 at 8:29 PM, Iggy Fernandez
<iggy_fernandez@xxxxxxxxxxx <mailto:iggy_fernandez@xxxxxxxxxxx>> wrote:
A friend asked me a question that I could not answer. He is in the
planning stages of an "extended RAC deployment" and is looking for
confirmation that multicasting is optional.
Help would be appreciated.
Kindest regards,
Iggy
--
Iggy Fernandez
Email: iggy_fernandez@xxxxxxxxxxx <mailto:iggy_fernandez@xxxxxxxxxxx>
Cellphone: (925) 478 3161
Blog: So Many Manuals So Little Time
<http://iggyfernandez.wordpress.com/>
Author of Beginning Oracle Database 11/g/ Administration
<http://books.google.com/books?id=pdSLnG66WQkC&printsec=frontcover#v=onepage&q&f=false>
Editor of the /NoCOUG Journal <http://bit.ly/rC2gRA>/
Lecturer at University of Washington Professional and Continuing
Education <http://www.pce.uw.edu/biography/ignatius-fernandez/>
------------------------------------------------------------------------
Date: Mon, 14 Apr 2014 11:13:03 -0700
From: kulkarniravi@xxxxxxxxx <mailto:kulkarniravi@xxxxxxxxx>
Subject: Extended RAC and multicast
To: iggy_fernandez@xxxxxxxxxxx <mailto:iggy_fernandez@xxxxxxxxxxx>
I am looking to setup extended RAC for my client. The details are
as following:
The two data centers are separated by a distance of less than 20
miles.
They are connected by a high speed dedicated connection.
Operating System: RHEL 6 64 bit
Database version: 11gR2 (11.2.0.3)
Hardware: Four servers with 4x16 configuration
All the documentation I have reviewed so far says multicast should
be enabled on the private interconnect between all the nodes
of a RAC database. However, my network resources tell me that
multicasting is not enabled across the data centers and VLANs
do not span across the data centers. The only reference I have
seen to multicasting requirement is in this Oracle document:
http://docs.oracle.com/cd/E16655_01/install.121/e17888/networks.htm#CWLIN476
Specifically it makes the following assertion:
"You do not need to enable multicast communications across routers"
Does this mean, multicast is optional?
Regards,
Ravi Kulkarni
