HP Virtual Connect Multi-Enclosure Stacking Reference Guide

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Additional stacking cables may be required or desired for some of the following reasons:
 If you have more than two VC-Enet modules per enclosure.
 If you want redundancy for more than one cable or module failure.
 If you want to minimize latency between a NIC and its uplink by reducing the hop count.
 If you want to increase bandwidth for IP communication between enclosures
Any of these reasons may lead you to add more physical connections in your stacking environment. You can add
additional physical links between VC modules where the first stacking link is located. Virtual Connect will use LACP to
form a Link Aggregation Group (LAG) with each stack link member terminating to the same VC-Ethernet modules.
None of the pictures above show Virtual Connect Fibre Channel modules or Fibre Channel connections since these are
irrelevant to the stacking cables layout. Remember that all enclosures in a domain must have the same Virtual Connect
Fibre Channel (and/or FlexFabric) module configuration and the same Fibre Channel uplinks.
Even if the examples above show only 2 Virtual Connect modules per enclosure, the same concepts would apply with
more modules. Here is an example with 4 enclosures and 4 modules per enclosure for a total of 16 modules which would
be the maximum supported in a domain: