Re: active-active for private IP?
- From: Karl Arao <karlarao@xxxxxxxxx>
- To: Dave.Herring@xxxxxxxxxx
- Date: Wed, 2 Dec 2009 05:02:47 +0800
I agree with LS.. and thanks for others who have shared their
experiences...
we are nearing conclusion (or not) that yeah.. "if your switches support
mode=4 then use it, else use other modes"
Let me run down the docs I've skimmed earlier:
1) from Doc ID 810394.1 RAC Assurance Support Team: RAC Starter Kit and Best
Practices (Generic)
Configure nics for fault tolerance (bonding/link aggregation). Note
787420.1</ep/faces/secure/km/DocumentDisplay.jspx?id=787420.1>
2) from Doc ID 811271.1 RAC Assurance Support Team: RAC Starter Kit
(Windows) - networking section of the guide
"Most customers use active/passive teaming rather than active/active. It is
recommended that all failure scenarios be tested
whichever teaming method is chosen. Please be aware that even with 2-node
cluster you must use a dedicated
network switch on the interconnect, Crossover cables are not supported.
Other settings recommended for the
NICS are :
• Flow Control : Auto
• Speed & Duplex : do not leave this as Auto - instead fix it to
full, at the maximum speed the card /
switch will allow (typically 1Gbit)"
3) Alejandro Vargas - RAC 10gR2 on RHEL - Detail Design and Best Practices
- Interconnect Configuration
- Configure interconnect full duplex / UDP
- Interconnect connected through switched Gigabit Ethernet
- Cross cable IS NOT SUPPORTED
BEST PRACTICES:
• Use NIC bonding and redundant interconnects for broader band.
• NIC's to be bonded must be same vendor and type.
• Set NIC and switch frame to Max, verify configuration is the
same end to end
• Configure failover and load balancing between the
interconnects and switches
• Check that network interfaces are configured correctly in
terms of speed, duplex, etc on all nodes.
4) Julian Dyke's Book... showed how to configure bonding using mode=1... but
also showed options for interconnect configuration on the hardware chapter
5) Marcin used the default mode (mode=0)
6) LS highlighted about mode=4
Hmm... above are modes 0,1,4...
but there are other modes too.. it would be interesting to know the pros &
cons of other modes (2,3,5,6) with regards to RAC setup..
Oracle did not explicitly tell to use specific mode aside from
Doc 811271.1...
- Karl Arao
karlarao.wordpress.com
>
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