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Abiquo 2.4


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Introduction to Cloud Tenant Networks

Abiquo's self-service virtual networks are based on VLANs in the Service Network. The service network is one of the Platform Networks. It configured with trunk connections to contain the virtual networks with different VLAN tags. The types of virtual networks that can be offered to cloud tenants are:

  • Private Networks
  • External Networks
  • Unmanaged Networks
  • Public Networks

Private VLAN

Features of the private network type are as follows:

  • Maximum netmask of /22
  • Created in the context of a VDC
  • VDC can have many Internal networks
  • VLAN tags are assigned by Abiquo and are automated from available tags supplied
  • IP address range must be selected from ‘private’ (non-routable) IP ranges
  • Can assign an IP address to VM
  • No exclusions of assigned addresses - for example to reserve ‘static’ IPs
  • Will be assigned automatically to a VDC as a default network if no other network
  • IP address from this network will be assigned automatically at deployment if this is the default network and no other IP address was assigned

External VLAN

This network also exists outside a VDC or even outside the Abiquo environment. Features are:

  • Maximum netmask of /22
    • To create large networks, you can use multiple external networks with the same VLAN tag
  • Created at datacenter level and assigned to an enterprise
  • Enterprise can have many External networks
  • VDC can have many External networks
  • It is fully configurable - the network address and VLAN tags are specified by the administrator
    • VMs can access other VMs on other VLANs with the same tag if they are on the same IP subnet, etc.
  • An external network can be selected as the ‘default’ network for a VDC 
  • If the external network is the default for the VDC, new VMs with no IP address assigned at deployment are given an IP address in this range by default
  • An external network can also be selected as the ‘default’ network for an enterprise 
  • If an external network is the enterprise default, new VDCs will be assigned this network as their default network when created
    • A default private VLAN will also be created
  • VMs from multiple VDCs in an enterprise can therefore connect to the same external network, as can machines outside the cloud platform
  • IPs assigned from an external network are not tracked against resource allocations and are not chargeable
  • You can reserve IPs in the external network
    • Enables you to statically assign IP addresses for gateways, firewalls, etc.
    • Enables specific sub-ranges of IP addresses to be auto-assigned by DHCP
    • You can determine the next IP to be assigned and provide it to users for static assignment
  • Addresses can be auto-assigned to VMs if the external network is a default network for a VDC)
  • No need to manually add IP addresses to the VDC from this network as with public network

Unmanaged VLAN

This network also exists outside a VDC.  Features are:

  • Maximum netmask of /22
  • Created at the cloud level and assigned to an enterprise
  • A type of external network
  • Enterprise can have many Unmanaged networks
  • VDC can have many Unmanaged networks
  • It is fully configurable - the network address and VLAN tags can be specified by the user.
  • An unmanaged network can be selected as the ‘default’ network for a VDC - if so, new VMs are not assigned any networking configuration by Abiquo
  • It is assumed that the network configuration will be assigned by other means, e.g. corporate DHCP server
  • An external network can also be selected as the ‘default’ network for an enterprise - if so new VDCs will be assigned this unmanaged network as their default network when created
  • VMs from multiple VDCs in an enterprise can therefore connect to the same unmanaged network (enabling inter VDC communications)
  • IPs assigned from an unmanaged network are not managed in Abiquo or tracked against resource allocations and are not chargeable
  • It is not possible to reserve IPs in the unmanaged network.

Public VLAN

Public networks are typically used only for providing incoming connections on Internet routable IPs.  Features of this type of network are:

  • Maximum netmask of /22
  • Created at cloud level but not assigned to an enterprise
  • There can be many public networks for one VDC
  • IP addresses MUST be manually made available and then selected for a specific VDC and then VM (either in the UI or via a specific API call)
  • Assigned IPs are tracked against allocations and can be billed for
  • Can be assigned to a VDC as the default network 
  • Cannot be assigned to an Enterprise as the default network in Abiquo 2.4

 

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