Reply To: ASUS Log – kernel: nf_conntrack: expectation table full ASUS System Log Warning – kernel: nf_conntrack: expectation table full message OK, so I upgraded my RT-AC86U to ASUSWRT-Merlin latest firmware RT-AC86U_384.14_0 I noticed, probable there from previous versions, the…

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So two years later I plugged back in my ASUS RT-AC86U a few days ago which is now running latest ASUSWRT-Merlin 386.7_2 and noticed that the ASUS Log was still showing the following log message and experienced internet access issues every couple of days.

 kernel: nf_conntrack: expectation table full

Could not understand why this was still an issue some two+ years later so had a good look online and found nothing useful, so decided to have a chat with ASUS to get this sorted…. or at least a way around the problem for the RT-AC86U.

In the ASUS Log – kernel: nf_conntrack: expectation table full – message appears due to the large number of connections on the LAN side by LAN devices/ applications, maybe from Gaming, Data mining etc.

Currently, I am trying the below cmd suggested by ASUS to see if this problem re-occurs and a couple of days is the key marker for myself.

nvram set ct_expect_max=1024
nvram commit
reboot

(the CMD will survive a reboot but not a factory reset)

You can execute the following command through Telnet / Putty etc. and should work for both Stock ASUSWRT as well as ASUSWRT-Merlin.

 

In a completely sane world, madness is the only freedom (J.G.Ballard).

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