Applies To:
Show Versions
BIG-IP LTM
- 12.1.6, 12.1.5, 12.1.4, 12.1.3, 12.1.2, 12.1.1, 12.1.0
Setting Connection Limits
Overview: About connection limits
You can configure a virtual server, pool member, or node to prevent an excessive number of connection requests during events such as a Denial of Service (DoS) attack or a planned, high-demand traffic event. To ensure the availability of a virtual server, pool member, or node, you can use the BIG-IP® Local Traffic Manager™ to manage the total number of connections and the rate at which connections are made.
When you specify a connection limit, the system prevents the total number of concurrent connections to the virtual server, pool member, or node from exceeding the specified number.
When you specify a connection rate limit, the system controls the number of allowed new connections per second, thus providing a manageable increase in connections without compromising availability.
Limiting connections for a virtual server, pool member, or node
- On the Main tab, expand Local Traffic, and then click Virtual Servers, Pools, or Nodes.
- Click the name of the virtual server, pool, or node you want to modify.
- For virtual servers only, from the Configuration list, select Advanced.
- In the Connection Limit field, type a number that specifies the maximum number of concurrent open connections.
- In the Connection Rate Limit field, type a number that specifies the number of new connections accepted per second for the virtual server.
- Click Update to save the changes.
Implementation results
Configuring a connection limit or a connection rate limit for a virtual server, pool member, or node prevents an excessive number of connection requests during events such as a Denial of Service (DoS) attack or a planned, high-demand traffic event. In this way, you can manage the total number of connections to a virtual server, pool member, or node, as well as the rate at which connections are made. When you specify a connection rate limit, the system controls the number of allowed new connections per second, thus providing a manageable increase in connections without compromising availability.
