High latency on the WAN port

[robinhqf]

Hi,
Recently, there are so many alarm latencies on the WAN port of my pfsense. WAN port is configured on the intel NIC.  Can somebody help me with that? Thanks. attached are the syslogs.

Hardware:
Model: Dell R710,
CPU: Intel(R) Xeon(R) CPU E5520 @ 2.27GHz 16 CPUs: 2 package(s) x 4 core(s) x 2 hardware thread ,
RAM: 8G ,
Network card: Embeded Broadcom NetXtreme II BCM5709 with 4ports, 2x intel E1G42ET 82576GB with 2ports

Pfsense2.4.2-RELEASE-p1