WAN Gateway Packet Loss

[networked]

Dear All,

I am new in networking, i have studied ICND1, studying ICND2.

we do not have router in our office, I have a problem in my pfsense (2.3.4) router, there is packet loss issue at my wan gateway (202.12x.xx.17/29). My wan static ip is 202.12x.xx.18/29. I have L3 switch which is responsible for inter Vlan routing, my pfsense Lan interface is 10.10.2.10/26 which is plugged into 10.10.2.0/26 (L3 switch) Vlan port (untagged port # 14), is it ok to plugged into an untagged port or should i have to plugged into tagged port (port # 23 is tagged). will it resolve the issue? I have extreme network switches.
I also changed all the ethrnet cables.
basically i have connection going direct to L3 Switch> L3 switch > pfsense. All other switches (five L2 switches) connected to L3 device.

I contact my ISP, but there is not a problem from ISP. i have 10 mega bits per second link. clients experiencing slow internet browsing.

please please please help me out, i am new to this job, i am studying ICND2, cant figure it out what the problem is.

[mniks]

try

System/ Routing/ Gateways/ Edit

advanced

Data Payload  = 1

or

send /Diagnostic/ ARPing to gateway ip from cron

[tim.mcmanus]

Are you using Google 8.8.8.8 or 8.8.4.4 as your gateway monitoring destination?  If so, change it.  Google will drop packets thereby creating a false positive packet loss.