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Jon_H_282543's avatar
Jon_H_282543
Icon for Nimbostratus rankNimbostratus
Sep 05, 2016

F5 does not send tcp reset on reboot

Hi all,   I have a pair of LTM 11.6.0 HF6 VE F5 nodes, when i power the standby down and then reboot the Active i don't see a TCP RST sent to the clients. Is this something to do with the floating...
application delivery
BIG-IP
LTM
koenning_107182's avatar
koenning_107182
Icon for Nimbostratus rankNimbostratus
Sep 05, 2016

A reboot does not cause the device to reset all connections in the connection table. This would simply be too ressource incentive.

 

However, subsequent traffic after the reboot should cause resets, as the corresponding connection entries will be missing. Keep in mind that then the RST rate is limited, see below:

 

SOL9812: Overview of BIG-IP TCP RST behavior https://support.f5.com/kb/en-us/solutions/public/9000/800/sol9812.html

 

SOL13151: Configuring the rate at which the BIG-IP system issues TCP RSTs or ICMP unreachable packets (11.x - 12.x) https://support.f5.com/kb/en-us/solutions/public/13000/100/sol13151.html