Configuring TCP timers
You can configure the following TCP timers:
synwait timer—When sending a SYN packet, TCP starts the synwait timer. If no response packet is received within the synwait timer interval, the TCP connection cannot be created.
finwait timer—When a TCP connection is changed into FIN_WAIT_2 state, the finwait timer is started. If no FIN packet is received within the timer interval, the TCP connection is terminated. If a FIN packet is received, the TCP connection state changes to TIME_WAIT. If a non-FIN packet is received, the system restarts the timer upon receiving the last non-FIN packet. The connection is broken after the timer expires.
The actual length of the finwait timer is determined by the following formula:
Actual length of the finwait timer = (Configured length of the finwait timer – 75) + configured length of the synwait timer
To configure TCP timers:
Step | Command | Remarks |
---|---|---|
1. Enter system view. | system-view | N/A |
2. Configure TCP timers. |
| Optional. By default:
|