Help Center> Elastic Load Balance> FAQs> Listeners> What Are the Three Timeouts of a Listener and What Are the Default Durations?
Updated on 2023-12-14 GMT+08:00
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What Are the Three Timeouts of a Listener and What Are the Default Durations?

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

Default Timeout Duration

TCP

Idle Timeout (keepalive_timeout)

Duration for a connection to keep alive. 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

300s

UDP

Idle Timeout (keepalive_timeout)

10s to 4000s

Shared load balancers: 10s

Dedicated load balancers: 300s

HTTP/HTTPS

Idle Timeout (keepalive_timeout)

0s to 4000s

60s

Request Timeout (client_timeout)

Duration after which the load balancer closes the connection with the client if the load balancer does not receive a request from the client.

1s to 300s

60s

Response Timeout (member_timeout)

Duration after which the load balancer sends a 504 Gateway Timeout error to the client if the load balancer receives no response after routing a request to a backend server and receives no response after attempting to route the same request to other backend servers

NOTE:

If you have enabled sticky sessions and the backend server does not respond within the response timeout duration, the load balancer returns 504 Gateway Timeout to the clients.

1s to 300s

60s
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