Help Center/ Elastic Load Balance/ FAQs/ Listeners/ What Are the Three Timeouts of a Listener?
Updated on 2025-06-30 GMT+08:00
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What Are the Three Timeouts of a Listener?

Table 1 lists the timeout durations of listeners at both Layer 4 and Layer 7.

  • For shared load balancers, you can configure and modify the timeout durations for TCP, HTTP, and HTTPS listeners.
  • For dedicated load balancers, you can configure and modify the timeout durations for TCP, UDP, HTTP, and HTTPS listeners.
Figure 1 Timeout durations at Layer 7
Figure 2 Timeout durations at Layer 4
Table 1 Timeout durations

Protocol

Type

Description

Value Range

TCP/UDP/TLS

Idle Timeout (keepalive_timeout)

Specifies the length of time for a connection to keep alive, in seconds. If no request is received within this period, the load balancer closes the connection and establishes a new one with the client when the next request arrives.

10s to 4000s

HTTP/HTTPS/QUIC

Idle Timeout (keepalive_timeout)

Specifies the length of time for a connection to keep alive, in seconds. If no request is received within this period, the load balancer closes the connection and establishes a new one with the client when the next request arrives.

0s to 4000s

Request Timeout (client_timeout)

Specifies the length of time (in seconds) that a load balancer is willing to wait for a client request to finish. The load balancer terminates the connection if a request takes too long to complete.

1s to 300s

Response Timeout (member_timeout)

Specifies the length of time (in seconds) after which the load balancer sends a 504 Gateway Timeout error to the client if the load balancer receives no response from the backend server after routing a request to the backend server and receives no response after attempting to route the same request to other backend servers.

If sticky session is enabled and the load balancer receives no response from the backend server within the response timeout duration, the load balancer returns a 504 Gateway Timeout error to the client directly.

NOTE:

If sticky session is enabled and the load balancer receives no response from the backend server within the response timeout duration, the load balancer returns a 504 Gateway Timeout error to the client directly.

1s to 300s
Parent topic: Listeners