This article provides information about the MTU of the EX switch, when Q-in-Q tunneling is enabled. Q-in-Q tunneling adds a service VLAN tag, before the customer’s 802.1Q VLAN tags. Depending on the interface configuration, the MTU value of the related ports is adjusted to accommodate the 4 bytes, which are used for the tag that is added by Q-in-Q tunneling. Test … [Read more...]