THOMSON ViBE VS7000 User Manual page 262

Appendix F 'Network Settings (6RU and 10RU Devices)' — Multiple Blade Centers
If there are more than four 10RU blade centers, or several 6RU blade
centers, they must be linked via an external switch, at least considering
the system private LAN.
An internal data LAN must not be shared on several blade centers: each
blade center must have its own internal data LAN.
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User Manual