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Deleting session as expected TCP segment with seq:1234 has not arrived even after 25 seconds

Hello,

we have a Cisco 877 DSL router which is working in VPN mode to our ASA.

We are getting complaints the office link is slow, but it doesn't seem slow to me, but the logs show these many times:

%FW-4-TCP_OoO_SEG: Deleting session as expected TCP segment with seq:2839949346 has not arrived even after 25 seconds

In the config I see:

ip inspect tcp reassembly queue length 64
ip inspect name outbound tcp
ip inspect name outbound udp
ip inspect name outbound ftp
ip inspect name outbound http
ip inspect name outbound icmp

What does the error mean and should I increase the queue length?

Thanks

 

 

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