I’m wondering if anyone has had similar experience to our slowness (especially at a remote site) issues.
We have been having a lot of Epicor slowness for the last year+ and seem to notice it more in our Iowa facility vs our Connecticut facility (where our hardware resides).
We did some very thorough testing this week with our networking consultant and Silverpeak (our networking hardware vendor) to see if there were any network related issues that is causing the Epicor slowness. Below is a synopsis of what we found (from the words of Sean, our networking consultant). Essentially, we are seeing large packets being sent from traffic within Connecticut network. However, those same processes done in Iowa are not seeing those packets being sent from Iowa to Connecticut, or back. These tests included logging into Epicor and opening Part Tracker. We tested both sides equally, at the same time and with the same process. What are these large packets being sent, and why are the not appearing in Iowa traffic?
Essentially, we are several packets that have a length of 1514 coming from the Utility server, higher than that standard Maximum Transmission Unit (MTU) of 1500 when we connect in CT.
Those oversized packets aren’t present in anything going to Iowa, in fact, they don’t seem to be going much of anywhere beyond the local network. Since the packets are going through locally, there shouldn’t be any issue since the main switches all seem to have an MTU of 9000 (Jumbo Frames enabled) and the packets are working locally. I will review the switch configs to verify those MTU packets are looking good on the majow switches.
We need to find out what those packets are and if they could be affecting the connection to Iowa. If so, can we dial those packet sizes back so they are the standard 1500 MTU length?
There is very little latency and pretty much no drops in packets going to Iowa as far as they can see. What goes in to CT is coming out in IA and vice versa, with the notable exception of those packets that we are seeing on Rob’s pcap.
Any thoughts or help would be appreciated.