Hi All,

I've been setting up a simple 2 node RAC on sun hardware using Solaris
9 and CRS, using 2 interfaces on each node as interconnects.

Each interconnect is connected to it's partner node via a different
gig switch.

The issue I'm seeing when testing failover is loss of a single
interconnect results in the second node rebooting, it's as though the
RAC isn't aware of the other remaining active interconnect network. Is
this normal behaviour?, or a likely configuration fubar on my part.
I've trawled google but can't find much detail on this to be honest.

I'd rather not go down the IPMP route on the interconnects as it would
mean trunking the 2 switches I have at present.

Any information you might be able to share on this would ge great!

Cheers,
Matt

On Apr 19, 10:15 am, Matt <matt.b...@ntlworld.com> wrote:
> Hi All,
>
> I've been setting up a simple 2 node RAC on sun hardware using Solaris
> 9 and CRS, using 2 interfaces on each node as interconnects.
>
> Each interconnect is connected to it's partner node via a different
> gig switch.
>
> The issue I'm seeing when testing failover is loss of a single
> interconnect results in the second node rebooting, it's as though the
> RAC isn't aware of the other remaining active interconnect network. Is
> this normal behaviour?, or a likely configuration fubar on my part.
> I've trawled google but can't find much detail on this to be honest.
>
> I'd rather not go down the IPMP route on the interconnects as it would
> mean trunking the 2 switches I have at present.
>
> Any information you might be able to share on this would ge great!
>
> Cheers,
> Matt

Hi matt,
i'm not sure, but i think that oracle doesn't manage redundant
private interconnect.
The best thing to do i think is to let Operatating system manage it
with "channel bonding".
I'm not system administrator, but i think that this is right way to do
solve your problem
Bye from Italy
Cristian Cudizio
http://cristiancudizio.wordpress.com
http://oracledb.wordpress.com

Matt,

If you want RAC to use both the network cards, you may want to set
cluster_interconnects parameter. However be warned that this is just
for load balancing purposes and not for fail overs. If you are
looking for a fail over at network card level, you may have to use
appropriate OS bonding/teaming techniques and in your case IPMP is the
way to go.



--
Best Regards,
K Gopalakrishnan
Co-Author: Oracle Wait Interface, Oracle Press 2004
http://www.amazon.com/exec/obidos/tg.../-/007222729X/

Author: Oracle Database 10g RAC Handbook, Oracle Press 2006
http://www.amazon.com/gp/product/007146509X/

On Apr 19, 8:17 pm, K Gopalakrishnan <kaygo...@gmail.com> wrote:
> Matt,
>
> If you want RAC to use both the network cards, you may want to set
> cluster_interconnects parameter. However be warned that this is just
> for load balancing purposes and not for fail overs. If you are
> looking for a fail over at network card level, you may have to use
> appropriate OS bonding/teaming techniques and in your case IPMP is the
> way to go.
>
> --
> Best Regards,
> K Gopalakrishnan
> Co-Author: Oracle Wait Interface, Oracle Press 2004http://www.amazon.com/exec/obidos/tg/detail/-/007222729X/
>
> Author: Oracle Database 10g RAC Handbook, Oracle Press 2006http://www.amazon.com/gp/product/007146509X/


I feared this may be the case, thanks very much for the clarification!

cheers,
Matt

Matt wrote:
> Hi All,
>
> I've been setting up a simple 2 node RAC on sun hardware using Solaris
> 9 and CRS, using 2 interfaces on each node as interconnects.
>
> Each interconnect is connected to it's partner node via a different
> gig switch.
>
> The issue I'm seeing when testing failover is loss of a single
> interconnect results in the second node rebooting, it's as though the
> RAC isn't aware of the other remaining active interconnect network. Is
> this normal behaviour?, or a likely configuration fubar on my part.
> I've trawled google but can't find much detail on this to be honest.
>
> I'd rather not go down the IPMP route on the interconnects as it would
> mean trunking the 2 switches I have at present.
>
> Any information you might be able to share on this would ge great!
>
> Cheers,
> Matt

You must do operating system level NIC bonding.
--
Daniel A. Morgan
University of Washington
damorgan@x.washington.edu
(replace x with u to respond)
Puget Sound Oracle Users Group
www.psoug.org