Disabling checksum offloading at install OSOL 2009.06 PV DomU on Xen 3.4.1 Ubuntu 9.04 Dom0

Posted by dba477 on Jul 19, 2009 11:50 AM EDT
Xen Virtualization on Linux and Solaris; By Boris Derzhavets 		Mail this story
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Regardless bug with failure checksum offloading was fixed in SNV_81 , i.e. a while ago. OpenSolaris 2009.06 PV DomU install at Xen 3.4.1 Linux Dom0 appears still to be affected. Wrong checksum may be easily captured via tcpdump on the LAN due to DHCPDISCOVER request issued by OSOL installer is a broadcast request. Following bellow procedure involves Solaris Kernel module debugger to patch OSOL’s (SNV_111b) kernel at booting up to succeed with dhcp lease and to be able proceed with initial install. File /etc/system gets updated via root terminal session before standard reboot to make the patch for kernel permanent. Posting is devoted first of all to Linux users , who are not aware of “kmdb” syntax and involving into boot process.

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