# HTTP Status Codes for Dedicated Load Balancers

The following code descriptions are only suitable for dedicated load balancers.

Status Code | Type | Description
--- | --- | ---
200 | OK | Normal response to GET and PUT requests.
201 | Created | Normal response to POST requests.
204 | No Content | Normal response to DELETE requests.

Module | Status Code | Type | Error Code | Possible Cause
--- | --- | --- | --- | ---
Public | 400 | Bad request | ELB.8902 | Malformed request URI or body.
Invalid admin _state_up value.
Invalid parameters.
Batch operations are not allowed.
Failed to verify the parameters.
Incorrect request method, for example, updating attributes that can be specified during creation only.
The network is not external (the value of router:external is set to false).
The IaaS OpenStack network port has no floating IP address bound.
The requested floating IP address is not in the IP address range of the external network.
Invalid fixed IP address.
The router port does not have a fixed IP address.
The subnet for the router interface must have a gateway IP address.
401 | Unauthorized | SYS.0401 | Authentication required.
403 | Forbidden | ELB.8903 | The URI does not exist. The resource cannot be found.
SYS.0403 | Authentication required.
404 | Not Found | ELB.8904 | The URI does not exist.
The resource cannot be found.
The port UUID is not valid.
409 | Conflict | ELB.8907 | The port is already in use.
The IP address is already in use.
The IP address pool cannot contain gateway and broadcast addresses.
The requested floating IP address is already in use.
The internal IaaS OpenStack network port and fixed IP address are already associated with another floating IP addresses.
ELB.8905 | The quota is used up.
500 | Internal server error | ELB.8906 | Internal IaaS OpenStack network error.
Load balancer | 400 | Bad request | ELB.8931 | The subnet IP version is not the same.
ELB.8932 | IPv6 subnets are not supported, but the value of ipv6_vip_virsubnet_id is not null.
Backend server | 400 | Bad request | ELB.8933 | IPv6 subnets are not supported, but backend servers use IPv6 addresses.

Parent topic: Common Parameters