A ZyXEL VMG1312-B10A is used at The Cattery and the MTU is configured as 1500 from the GUI. Testing shows --
« SpeedGuide.net TCP Analyzer Results »
Tested on: 2018.04.08 14:03
IP address: xxx.xxx.xxx.xxx
Client OS/browser: Linux (Firefox 52.0)
TCP options string: 020405b40402080a015972080000000001030307
MSS: 1460
MTU: 1500
TCP Window: 29312 (not multiple of MSS)
RWIN Scaling: 7 bits (2^7=128)
Unscaled RWIN : 229
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 1172kbps (147KBytes/s)
BDP limit (500ms): 469kbps (59KBytes/s)
MTU Discovery: ON
TTL: 49
Timestamps: ON
SACKs: ON
IP ToS: 00000000 (0)
Pinging various targets --
[Duo2 ~]$ ping -M do -s 1472 -c 3 bbc.co.uk
PING bbc.co.uk (151.101.64.81) 1472(1500) bytes of data.
1480 bytes from 151.101.64.81: icmp_seq=1 ttl=57 time=52.4 ms
1480 bytes from 151.101.64.81: icmp_seq=2 ttl=57 time=52.1 ms
1480 bytes from 151.101.64.81: icmp_seq=3 ttl=57 time=53.2 ms
--- bbc.co.uk ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2056ms
rtt min/avg/max/mdev = 52.170/52.626/53.270/0.468 ms
[Duo2 ~]$
[Duo2 ~]$ ping -M do -s 1472 -c 3 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 1472(1500) bytes of data.
1480 bytes from 8.8.8.8: icmp_seq=1 ttl=58 time=53.5 ms
1480 bytes from 8.8.8.8: icmp_seq=2 ttl=58 time=56.1 ms
1480 bytes from 8.8.8.8: icmp_seq=3 ttl=58 time=58.4 ms
--- 8.8.8.8 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2062ms
rtt min/avg/max/mdev = 53.599/56.069/58.493/2.007 ms
[Duo2 ~]$
[Duo2 ~]$ ping -M do -s 1472 -c 3 1.1.1.1
PING 1.1.1.1 (1.1.1.1) 1472(1500) bytes of data.
1480 bytes from 1.1.1.1: icmp_seq=1 ttl=57 time=51.6 ms
1480 bytes from 1.1.1.1: icmp_seq=2 ttl=57 time=51.3 ms
1480 bytes from 1.1.1.1: icmp_seq=3 ttl=57 time=53.0 ms
--- 1.1.1.1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2056ms
rtt min/avg/max/mdev = 51.318/52.012/53.049/0.769 ms
[Duo2 ~]$
[Duo2 ~]$ ping -M do -s 1472 -c 3 cloudflare.com
PING cloudflare.com (198.41.214.162) 1472(1500) bytes of data.
1480 bytes from 198.41.214.162: icmp_seq=1 ttl=57 time=51.4 ms
1480 bytes from 198.41.214.162: icmp_seq=2 ttl=57 time=51.0 ms
1480 bytes from 198.41.214.162: icmp_seq=3 ttl=57 time=49.5 ms
--- cloudflare.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2052ms
rtt min/avg/max/mdev = 49.503/50.675/51.441/0.861 ms
[Duo2 ~]$