On 01/04/2015 01:51 PM, Scott Allen wrote:
On 4 January 2015 at 12:55, James Knott <james.knott@rogers.com> wrote:
You can verify the MTU with a ping -s 1500 <destination>. If that works, then you have a 1500 byte MTU along the entire path to the destination. My router says that the address of the gateway that it's connected to is 24.246.95.97. If I ping this address I get:
$ ping -s 1500 24.246.95.97 PING 24.246.95.97 (24.246.95.97) 1500(1528) bytes of data. 1508 bytes from 24.246.95.97: icmp_seq=1 ttl=254 time=12.2 ms 1508 bytes from 24.246.95.97: icmp_seq=2 ttl=254 time=13.5 ms 1508 bytes from 24.246.95.97: icmp_seq=3 ttl=254 time=15.7 ms 1508 bytes from 24.246.95.97: icmp_seq=4 ttl=254 time=12.1 ms ^C --- 24.246.95.97 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3004ms rtt min/avg/max/mdev = 12.151/13.429/15.765/1.449 ms
That shows you have a 1500 byte MTU, so Teksavvy is doing things properly. Either they're saying to use 1500 or not using option 26 at all. Fire up Wireshark to see.