A subnet represents an IP address block that can be used for assigning IP addresses to virtual instances. Each subnet must have a CIDR and must be associated with a network. IPs can be either selected from the whole subnet CIDR, or from "allocation pools" that can be specified by the user.
A subnet can also optionally have a gateway, a list of DNS name servers, and host routes. All this information will then be pushed to instances whose interfaces are associated with the subnet.
- Table: cloud_subnets
- Used in: OpenStack
| Column | Type | Used in | Comment |
|---|---|---|---|
| name | string | OpenStack | |
| ems_ref | string | OpenStack | |
| ems_id | integer | OpenStack | |
| availability_zone_id | integer | OpenStack | ForeignKey |
| cloud_network_id | integer | OpenStack | ForeignKey |
| cidr | string | OpenStack | Valid CIDR in the form <network_address>/ |
| status | string | OpenStack | |
| dhcp_enabled | boolean | OpenStack | { true or false } |
| gateway | string | OpenStack | Valid IP address or null |
| network_protocol | string | OpenStack | IP version { ipv4 or ipv6 } |