Hi, I'm currently dealing with jumbo frame configurations, and I'm not sure about the function of the mtu size value under the vlan configuration or database mode? I have found only a short statement on cisco.com: "â¦ With the VLAN database setting, the switch checks for an MTU value greater than 1500. If the switch detects a higher value, puts the VLAN in a non-operational state. Therefore, to support large frames, you only need to change the interface MTU value and not the VLAN database MTU value..." (http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml)
For me, this sounds confusing. Because to support jumbo frames, I configure the MTU only at global system mtu, and/or at the interface level (depending on switch model). This results in a higher value than the vlan mtu. Can anyone please explain the function of the vlan mtu and the relationship to the mtu of L2 and L3 (SVI) ports?
Thanks & regards