This topic lists the quotas of Server Load Balancer (SLB) resources.
SLB provides an API operation to query the quotas of SLB resources.
Item | Quota | Adjustable |
|---|---|---|
Limits on SLB instances | Go to the Quota Management page to increase the quota. For more information, see Manage service quotas. | |
SLB instances that can be created in an account | 30 | |
Maximum number of times that an ECS instance can be attached to an SLB instance | 50 | |
Maximum number of backend servers that can be attached to an SLB instance | 200 | |
Maximum number of listeners that can be configured for an SLB instance | 50 | |
Maximum number of domain name-based and URL-based forwarding rules that can be added to an HTTP or HTTPS listener | 40 | |
Maximum number of additional certificates that an HTTPS listener can create | 3 | |
Range of frontend and backend ports that can be used by a listener (Alibaba Cloud) | 1-65535 | |
Range of frontend and backend ports that can be used by a listener (Finance Cloud) |
| |
Limits on certificates | ||
Maximum number of server certificates that can be uploaded in a region | 100 | |
Maximum number of client Certificate Authority (CA) certificates that can be uploaded in a region | 100 | |
Limits on access control lists | ||
Maximum number of access control lists that can be created in a region | 50 | |
Maximum number of IP addresses that can be added to an access control list | 300 | |
Maximum number of IP addresses that can be added to an access control list in an API operation | 50 | |
Maximum number of times that an access control list can be associated with listeners | 50 | |
Public key algorithms supported by SLB |
| Not supported. |