Limitations

Last Updated: Aug 21, 2017

ItemLimitationException
ECS instances added to a Server Load Balancer instance Must have one ECS instance at least, and the region of the ECS instance and the Server Load Balancer instance must be the same. No
Types of a Server Load Balancer instance Public/Private No
Billing methods By traffic or by bandwidth No
Public bandwidth range for a Server Load Balancer instance (Pay by bandwidth) 1-5000 MB,default is 1 MB No
Default quota of Pay-As-You-Go instances 60 Submit a ticket to apply for more
Restrictions on Server Load Balancer instance name The length is 1-80 characters, including letters, digits, hyphen (-), backslash (/), period (.) and underscore (_ ) No
The number of listeners added in a Server Load Balancer instance 50 No
The number of the domain/URL forwarding rules added to a layer-7 listener 20 Yes
Supported protocols HTTP/HTTPS/TCP/UDP No
Front-end/backend port range used in a listener 1-65535 No
Front-end/backend port range used in a listener (Financial Cloud) 80,443,2800-3300,5000-10000,13000-14000 No
Supported scheduling algorithms Round robin, Weighted round robin (WRR), Weighted least connections (WLC) No
Cookie processing in HTTP session persistence insert/server,default is insert No
Cookie timeout for HTTP protocol 1-86400, default is 3600 No
Cookie name restrictions The length is 1-200,and must comply with RFC2965. This means that it only contain ASCII English letters and digits, and cannot contain commas, semicolons, spaces, or begin with a dollar symbol “$” No
Health check port for HTTP protocol 1 – 65,535 (default is the backend server port) No
Health check domain for HTTP protocol The length is 1-80 characters, including letters, digits, hyphen (-), period (.) No
Health check URI for HTTP protocol The length is 1-80 characters, including letters, digits, ‘-’,‘/’,‘.’,‘%’,‘?’,‘#’,‘&’ No
Health check timeout for HTTP protocol 1-300s, default is 5 No
Health check interval for HTTP protocol 1-50s, default is 2 No
Healthy threshold for HTTP protocol health check 2-10, default is 3 No
Unhealthy threshold for HTTP protocol health check 2-10, default is 3 No
Session timeout for TCP protocol 1-3600s No
Health check port for TCP protocol 1 – 65,535 (default is the backend server port) No
Health check timeout for TCP protocol 1-300s, default is 5 No
Health check interval for HTTP protocol 1-50s, default is 2 No
Healthy threshold for TCP protocol health check 2-10, default is 3 No
Unhealthy threshold for TCP protocol health check 2-10, default is 3 No
Health check port for UDP protocol 1 – 65,535 (default is the backend server port) No
Health check timeout for UDP protocol 1-300s, default is 10 No
Health check interval for UDP protocol 1-50s, default is 10 No
Healthy threshold for TCP protocol health check 2-10, default is 3 No
Unhealthy threshold for UDP protocol health check 2-10, default is 3 No
Number of backend ECS instances that can be added or deleted in batch 20 No
API access frequency limit for a single key 5,000 times/day No automatic process is available now. Contact customer service or Business Development for help.
Maximum number of certificates uploaded by a single user 100 No automatic process is available now. Contact customer service or Business Development for help.
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