extreme network latency

Richard Nyberg rnyberg at murmeldjur.se
Sun Oct 16 01:53:27 PDT 2016


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


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