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Basic Networking needs to be restored - Advanced networks with security groups is not the same. #4863

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@PaulAngus
ISSUE TYPE
  • Bug Report
COMPONENT NAME
UI and potentially networking, zone creation etc.
CLOUDSTACK VERSION


To simplify/consolidate the networking models (primarily to remove a lot of Cloud Operator confusion) it was 'concluded' that as 'basic networking' is the same as 'advanced networking with security groups' with only one network (VLAN); basic networking as a separate networking type could be depreciated.

However, this premise is not correct.

**'Basic networking' is NOT the same as 'advanced networking with security groups' with only one network (VLAN)**


- Guest networks in basic networking, have ONE SUBNET PER POD, and a gateway per pod for inter-pod guest traffic.  They also have on VR per pod to supply the DHCP, DNS, metadata and user data for that POD (Broadcast domain).
- Guest networking in an advanced network with security groups has ONE SUBNET PER VLAN, which spans the ENTIRE ZONE.  A zone created in this way would have one VR for the entire zone.

They may look very similar when there is only one cluster.
BUT THEY ARE COMPLETELY DIFFERENT.

I'm all for renaming the network styles (basic and advanced is just meaningless).  But an 'advanced network with security groups' with one network zone is nothing like a basic networking zone.

Basic networking cannot be removed in the way that it has.

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