To find the proper MTU size, you'll have to do a special ping of the destination you're trying to go to. This could be a local machine (a router, gateway, etc.) or a distant server on the internet (eg. example.com). In case of a Windows machine the ping command should be formatted like:

vSAN health alarm __Basic (unicast) connectivit |VMware Dec 03, 2017 (超メモ)ping とか MTU とかよく解ってなかったのでメモ | … $ ping -M do -s 1500 -c 3 192.168.xx.100 PING 192.168.xx.100 (192.168.xx.100) 1500(1528) bytes of data. ping: local error: Message too long, mtu=1500 ping: local error: Message too long, mtu=1500 ping: local error: Message too long, mtu=1500 --- 192.168.33.100 ping statistics --- 3 packets transmitted, 0 received, +3 errors, 100% packet loss MINT MTU | Extreme Networks Support Community From 192.168.7.205 icmp_seq=1 Frag needed and DF set (mtu = 1500)[/code]Then, using over-sized MTU for MINT will cause fragmentation also. UDP will handle that, but it is better not to bring another potential issue to over-WAN communication: VX#mint ping 4D.87.1A.F0 size 1472 MiNT ping 4D.87.1A.F0 with 1472 bytes of data. Response from 4D.87.1A

The extended ping is used to perform a more advanced check of host reachability and network connectivity. The extended ping command works only at the privileged EXEC command line. The normal ping works both in the user EXEC mode and the privileged EXEC mode. In order to use this feature, enter ping at the command line and press Return.

3. Our MTU size is 1500 which is the default MTU size on most systems. Change Windows MTU Size. 1. Open a Command Prompt CMD (Right Click CMD -> Run Ad Administrator) 2. Type the following commands in order. netsh interface ipv4. 3. Your command window will now be at the prompt to change MTU using the next command below. 4. Ping towards a server with MTU 1500. NEXUS-RN7010-72-dc-v2# ping 172.22.55.88 packet-size 1472 df-bit count 2 PING 172.22.55.88 (172.22.55.88): 1472 data bytes 1480 bytes from 172.22.55.88: icmp_seq=0 ttl=127 time=3.272 ms 1480 bytes from 172.22.55.88: icmp_seq=1 ttl=127 time=2.369 ms — 172.22.55.88 ping statistics — May 12, 2020 · Fortunately, we can do advanced troubleshooting and find the path MTU with the precious simple networking tool — The Ping Command. How Does Path MTU Discovery Work? The default Ethernet II MTU size is 1500 bytes, which is the largest size allowed in most of the Internet. Determining the correct MTU size. To determine the correct MTU size for your network, you’ll have to do a specific ping test on the destination you’re trying to go to like using another computer or a web address. For Windows® computers, use the following command for the ping test: ping [url / local server or IP Address] –f –l xxxx

When customer does any kind of WAN crossing which affects maximum transmission unit size you shall confirm MINT will also handle this. To verify the general MTU size that will pass check with don't fragment option when pinging the remote site: VX#ping 88.88.88.88 dont-fragment size 1472 PING 88.88.88.88 (88.88.88.88) 1472(1500) bytes of data.

vSAN health alarm __Basic (unicast) connectivit |VMware Dec 03, 2017 (超メモ)ping とか MTU とかよく解ってなかったのでメモ | …