Database Reference
In-Depth Information
Figure 8.11
Windows VMXNET3 vNIC advanced properties page.
Testing Jumbo Frames
Now that you have configured jumbo frames, you need to verify everything is working
correctly. To do this, you need to test the network path from the source to the destination
where jumbo frames are used. This could be from a primary server of an AlwaysOn
Availability Group to its secondary server. We will now discuss two examples of how
to verify correct jumbo frames configuration.
One of the easiest ways to verify the network path is configured correctly for jumbo
frames is to use ping. This method works regardless of whether you chose to use a
virtual standard switch (vSS) or a vSphere distributed switch (vDS). Instead of using
the standard ping without any options, you need to specify the packet size and specify
that no packet fragmentation should occur. You need to make sure you use the correct
packet size; otherwise, you will get an error.
As shown in
Figure 8.12
,
even though we have configured our network to accept 9,000-
byte packets, we still have to account for the necessary headers (ICMP and IP) when we
are testing the jumbo frames configuration.
