thanks kevin,

just what should I do, I am not network expert, and I followed an oracle article to setup RAC 10g on VM machines, I don't want my RAC to be affected, since it uses also virtual IPs, and I can't use DHCP to genenerat guest IPs it is not recomended by oracle fot the sake of the RAC and the databse.please guide me through.

thanks in advance

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omarsawalhah