extreme network latency

[Richard Nyberg]

Hi users!

I've just changed hardware for my gateway. It's now built on the asus
z170i pro gaming motherboard and runs df 4.6. Unfortunately it suffers
extreme latency on my lan and I don't know how to troubleshoot this.
Between other devices on the lan there's no problem. The gateway isn't
loaded in the least since I haven't installed any other services other
dhcp yet.

### Gateway lan interface config:

shoebox# ifconfig em0
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=1b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING>
        inet 10.5.2.1 netmask 0xffffff00 broadcast 10.5.2.255
        inet6 fe80::2e56:dcff:fe96:5961%em0 prefixlen 64 scopeid 0x2
        ether 2c:56:dc:96:59:61
        media: Ethernet autoselect <rxpause> (1000baseT <full-duplex,rxpause>)
        status: active

# ## /etc/pf.conf

ext_if="re0"
int_if="em0"

scrub in

nat on $ext_if from !($ext_if) -> ($ext_if:0)

block in
pass out keep state

pass quick on { lo0 $int_if }
antispoof quick for { lo0 $int_if }

pass on $ext_if proto { icmp }

### Pinging from my desktop:

C:>ping 10.5.2.1

Pinging 10.5.2.1 with 32 bytes of data:
Request timed out.
Reply from 10.5.2.1: bytes=32 time=66ms TTL=64
Reply from 10.5.2.1: bytes=32 time=559ms TTL=64
Reply from 10.5.2.1: bytes=32 time=1647ms TTL=64

Ping statistics for 10.5.2.1:
    Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
    Minimum = 66ms, Maximum = 1647ms, Average = 757ms

###

Any ideas?

Best regards,
-Richard