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тАО01-10-2011 11:54 AM
тАО01-10-2011 11:54 AM
multiple IPs same NIC same subnet advisable?
Each blade has 4 onboard NICs (we'll add a mezzanine card later to add APA).
Per our Architect's specs, on each blade, we have:
IP 1 in 192.168.204.x subnet on lan0.
IP 2 in 10.xx.xx.xx subnet on lan1
IP 3 in 192.168.75.xx subnet on lan2
IP 4 in 192.168.75.xx subnet on lan2:801
(this last "VIP" floating IP is automatically configured by Oracle RAC)
No IP on lan3
Problem symptom: we have seen packet loss pinging IP3 on one system from another RAC node and IP4 (VIP floater) transferring to another node intermittently.
Basic question: is it advisable to allow Oracle to configure IP 4 on 192.178.75.xx network on lan2:801 in the same subnet as IP 3?
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тАО01-10-2011 12:20 PM
тАО01-10-2011 12:20 PM
Re: multiple IPs same NIC same subnet advisable?
I don't think you can even assign a different LAN / network address to a VIP than its non-VIP physical's IP.
So yes.
Check your netmasks though.
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тАО01-10-2011 03:25 PM
тАО01-10-2011 03:25 PM
Re: multiple IPs same NIC same subnet advisable?
So, short answer, anything is possible but proceed with extreme caution.
UNIX because I majored in cryptology...
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тАО01-11-2011 05:04 AM
тАО01-11-2011 05:04 AM
Re: multiple IPs same NIC same subnet advisable?
I am just folowings what our venerable Network Team told us.
So ye saying that if lan900 is 10.10.10.100, I can have lan900:1 as 192.168.10.100 ?
Yours truly.
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тАО01-11-2011 05:42 AM
тАО01-11-2011 05:42 AM
Re: multiple IPs same NIC same subnet advisable?
>>So ye saying that if lan900 is 10.10.10.100, I can have lan900:1 as 192.168.10.100 ?
No; that you can't have. The multiplexed IPs have to be on the same subnet as the initial one assigned to the card.
Doug
------
Senior UNIX Admin
O'Leary Computers Inc
linkedin: http://www.linkedin.com/dkoleary
Resume: http://www.olearycomputers.com/resume.html
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тАО01-11-2011 05:46 AM
тАО01-11-2011 05:46 AM
Re: multiple IPs same NIC same subnet advisable?
Well Mell?
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тАО01-11-2011 10:05 AM
тАО01-11-2011 10:05 AM