Unix, Linux, DevOps , Cloud computing and BigData Knowledge-Base

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IPMP Configurations – In Solaris 8 & 9

Summary of typical IPMP Configurations: 1.  Production and test interfaces in the same IP subnet 1.1  With defaultrouter 1.2  Without defaultrouter 1.3  With dedicated hosts acting as test targets with “host-routes” 1.4  Configuration example for 1.1, 1.2 and 1.3 2.  Production and test interfaces in different...

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Linux Boot loader – GRUB

The function of a boot loader is to locate the Linux kernel, and load it into memory before starting it. Boot loading usually occurs in at least two    stages – the BIOS loads the primary boot loader, which loads a secondary boot loader in order...

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VXVM on Solaris ( Sparc ) – Understanding boot Failures

Possible reasons for a boot failure: The boot device cannot be opened. The system cannot be be booted from unusable or stale plexes. A UNIX partition is invalid. There are incorrect entries in /etc/vfstab. Configuration files are missing or damaged

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Solaris Admin Reference – IPMP Diagnosis and Troubleshooting

Symptoms: *  mpathd error messages in /var/adm/messages: “No test address configured on interface <interface_name> disabling probe-based failure detection on it” “Test address address is not unique; disabling probe based failure detection on <interface_name>” “The link has gone down on <interface_name>” “Successfully failed over from  NIC  <interface_name1>...

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