Hi, I'm having some issues with network connectivity on a system. When doing netstat -ns, I get a lot of errors with missed PCB cache, drops due to no socket. I have already increased the TCP and UDP send and receive space up to 262144, but the error counters are still increasing. One of the highest impacts is a lot of false positive alerts in our monitoring system since this generates a lot of errors with the SNMP monitoring, which has a lot of high rate UDP bursts.
The systems are a pair of Dell 1950s with dual Xeon 5130 2GHz CPUs and the network cards are Intel PRO/1000 PT (82571EB). The running version is 4.8 GENERIC.MP#335 amd64. All they are doing is routing and filtering with PF and PFSync. Any idea what else I could tweak or modify to rectify these errors? Let me know if there is anything else that I should include to provide additional information. Thanks, Steve Johnson
