I have problem in a wan link, using a wireless equipement. We have 2 catalyst 3560 installed between wireless link. All it?s ok, but when activate a trunk and/or vlan on this wan, I have problem with something exemple, windows autentification?
I found the problem, I must set the mtu at 1496 or lower. But I found nothing in my catalyst for lower mtu under 1500 !
Somebody are idea ?
Actually, you can change and lower the IP MTU on your routed interface, the ones named vlan1, vlan2 etc.
hope this helps, please rate post if it does!