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A very powerful feature of Emulab is its ability to load custom OSes (disk
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images) to its nodes. In order to provide control over the testbed nodes,
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Emulab software uses network-booted, memory-filesystem-based FreeBSD
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systems (hereafter known as MFSes). Each node upon powering on will boot
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one of these images over PXE/tftp and check in with the Emulab control
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system. At this point the node may either remain in the MFS, boot an
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existing partition on its disk, or receive a new disk image from boss via
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the control network.
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If you are in the middle of installing a new Emulab, the installation
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process has already downloaded and localized the MFSes for you, but if you
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need to update later (say, if your hardware does not boot and you need a
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new kernel from Utah), then you will want to look at the instructions on
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the [MFS Import](install/MFS Import) page.
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* [Prev](install/Initial Switch Setup)
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* [Next](install/Adding Nodes)
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* [Home](install/Installing Emulab) |