12-08-2015 06:14 AM
How does the layer 2 switch process the packet when the packet is bigger than the MTU of the switch's interface?
There are 2 situations:
1, How does the layer 2 switch process the ingress packet.
2, How does the layer 2 switch process the egress packet.
For the first question, I'm sure we all know the answer. And it proves that the layer 2 switch would check the FCS field of the frames, because the layer 2 switch would drop the frame whose size is bigger the MTU of the interface.
But how would the switch act if the interface's MTU are different?
I asked another question about this, and thanks to Armand Wang,what I really should ask.
Like the Pic above, How does the switch's port 2 process the packet port 1 received a frame whose size is bigger than the Port 2's MTU?
Solved! Go to Solution.
12-08-2015 10:19 AM
In my experience, it would depend on the switch, and the way the software on it is written.
Most I've worked with check MTU on ingress, and not egress.