Gopal, We have a very close relationship with VOS and I have always found the Veritas side of VOS extremely competent and technically very sound. We are not currently running RAC (and there is a long story behind it) but if we run into any issues with LLT in the future, I have good faith that Veritas will resolve the issue for us. Amir ________________________________ From: K Gopalakrishnan [mailto:kaygopal@xxxxxxxxx] Sent: Friday, November 24, 2006 1:54 AM To: Hameed, Amir; panandrao@xxxxxxxxx; ax.mount@xxxxxxxxx Cc: Oracle-l List; racdba@xxxxxxxxxxxxx Subject: Re: RAC Interconnect Amir, With LLT, when you have an issue with performance/node evictions you will be asked to reproduce the problem without LLT (i.e UDP) and you may not able to file bugs/enhancements with LLT. Contact me offline if you need more details on this . RacDBAs... Do you guys have any details for wider audience? -Gopal Author: Oracle Database 10g RAC Handbook, Oracle Press 2006 http://www.amazon.com/gp/product/007146509X/ ----- Original Message ---- From: "Hameed, Amir" <Amir.Hameed@xxxxxxxxx> To: panandrao@xxxxxxxxx; ax.mount@xxxxxxxxx Cc: oracle-l@xxxxxxxxxxxxx Sent: Thursday, 23 November, 2006 10:08:03 PM Subject: RE: RAC Interconnect Hello, I have worked with LLT for over two years with DBE/AC 3.5 for 9i RAC and found no issues what-so-ever with it (LLT). It is a very reliable protocol, proprietary though, but reliable. The LMX driver does the multiplexing and de-multiplexing for LLT, so if you are using multiple interconnects, your traffic will be load-balanced without you doing/configuring anything special. I have not really seen any clear statement from Oracle for de-supporting LLT in the future even though they have been emphasizing on using UDP, which is very typical of Oracle.