Ping spieks

Ginz · July 12, 2017

I have stumbled into a problem which I cannot solve.

I am currently having ping spikes to my second server (2x Xeon L5640, Genuine Intel I350-T4 NIC) which is running Proxmox (Debian Jessie). I am currently connecting through the I350, and only 1 VM is online at the moment, which is a pfSense VM. The I350 is not using PCI-E passthrough, just bridged ports.

This setup used to work fine (for months), but now I am getting random ping spikes which I can't figure out where they're from.

C:\Users\jonny>ping 192.168.1.3 /n 12

Pinging 192.168.1.3 with 32 bytes of data:
Reply from 192.168.1.3: bytes=32 time<1ms TTL=64
Reply from 192.168.1.3: bytes=32 time<1ms TTL=64
Reply from 192.168.1.3: bytes=32 time=158ms TTL=64
Reply from 192.168.1.3: bytes=32 time=260ms TTL=64
Reply from 192.168.1.3: bytes=32 time=42ms TTL=64
Reply from 192.168.1.3: bytes=32 time<1ms TTL=64
Reply from 192.168.1.3: bytes=32 time=1ms TTL=64
Reply from 192.168.1.3: bytes=32 time=13ms TTL=64
Reply from 192.168.1.3: bytes=32 time=2ms TTL=64
Reply from 192.168.1.3: bytes=32 time=169ms TTL=64
Reply from 192.168.1.3: bytes=32 time=6ms TTL=64
Reply from 192.168.1.3: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.1.3:
    Packets: Sent = 12, Received = 12, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 260ms, Average = 54ms

C:\Users\jonny>ping 192.168.1.1 /n 12

Pinging 192.168.1.1 with 32 bytes of data:
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.1.1:
    Packets: Sent = 12, Received = 12, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

Pinging other devices on the network works fine and is not spiking.

Pinging from another device to the server still spikes.

My other Proxmox server (Xeon 1225v3) doesn't have this issue.

I've tried rebooting, and tried using my SuperMicro Intel network interfaces, but it hasn't fixed it.

CPU usage is at 1-2% out of the 12 cores, 24 threads.

Load average is at 0.5

I'm only using 2GB/32GB RAM.

Almost no I/O usage.

Network traffic is low (like ~2mbps).

Ports are connected at 1Gbps