Cisco Nexus 3064 MTU




The Cisco Nexus 3064 maximum transmission units (MTU) default size is 1500 bytes. The switch cannot have two ports in the same Layer 2 domain with different MTUs, A per-physical Ethernet interface MTU is not supported. Instead, the MTU is set according to the QoS classes.

Configure the switch with system wide MTU value of 9216 (jumbo Frame):

sw0# config t
sw0(config)# policy-map type network-qos jumbo
sw0(config-pmap-nq)# class type network-qos class-default
sw0(config-pmap-nq-c)# mtu 9216
sw0(config-pmap-nq-c)# exit
sw0(config-pmap-nq)# exit
sw0(config)# system qos
sw0(config-sys-qos)# service-policy type network-qos jumbo
sw0(config-sys-qos)# exit
sw0(config)# exit