Author: Antxon Gonzalez
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To understand Abiquo Cloud networking, you need to take into account these concepts first.
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Racks
Before you add a Physical Machine to a Datacenter, you need to create the Rack it will belong to.
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This pool is used to provide Private networks to Virtual Datacenters.
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Network service type
Every time you add a Physical Machine, you must choose its Rack and specify the Network Service Type (NST) its network interfaces are connected to.
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This does not imply that VLANs inside a NST are interconnected, as this depends on the VLAN type.
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Cloud networks
Cloud Networks in Abiquo are defined by their type, NST and VLAN tag. This means that all VMs using a network will run on hypervisors with NICs of the corresponding NST.
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There are three different kind of networks:
Private: Bound to the Virtual Datacenter (VDC) they were created in.
The VLAN tag is taken from the VLAN pool of a rack automatically, bounding the network workload to it.External: Bound to a Datacenter and an Enterprise.
This means that the network VLAN tag has the same meaning for all racks in the Datacenter.Public: Bound to a Datacenter only.
They are similar to external networks, but more than one enterprise may use them.
Private networks are bound to the rack they were defined in, and their VLAN tags have no meaning outside this rack. This means that VDCs are bound to the rack their private networks are defined in.
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The only way for VMs in different enterprises communicate is through a public network.
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DHCP
There are two different approaches to get DHCP working in your environment: Regular DHCP infrastructure or the Abiquo DNSMasq networking solution.
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