The process of configuring Jumbo Frames may vary depending on the Nexus series switch model. Below are the steps to configure Jumbo Frames on Cisco Nexus 9000, 7000, and 5000 series switches:
Nexus 9000 Series
The Nexus 9000 series switch supports a system jumbo MTU. Use the `system jumbo MTU` command to set it:
switch# configure terminal
switch(config)# system jumbomtu 9216
switch(config)# exit
After that, you can configure the Jumbo MTU on individual interfaces if needed.
switch# configure terminal
switch(config)# interface Ethernet1/1
switch(config-if)# mtu 9216
switch(config-if)# exit
Nexus 7000 Series
For the Nexus 7000 series, you need to create a QoS class policy for the jumbo frames and then apply it to the relevant interfaces:
switch# configure terminal
switch(config)# policy-map type network-qos jumbo
switch(config-pmap-nq)# class type network-qos class-default
switch(config-pmap-c-nq)# mtu 9216
switch(config-pmap-c-nq)# exit
switch(config-pmap-nq)# exit
switch(config)# system qos
switch(config-sys-qos)# service-policy type network-qos jumbo
Then, use the policy on the interface:
switch(config)# interface Ethernet1/1
switch(config-if)# service-policy type qos input jumbo
switch(config-if)# exit
Nexus 5000 Series
For the Nexus 5000 series, you can set the system jumbo MTU:
switch# configure terminal
switch(config)# policy-map type network-qos jumbo
switch(config-pmap-nq)# class type network-qos class-default
switch(config-pmap-c-nq)# mtu 9216
switch(config-pmap-c-nq)# exit
switch(config)# system qos
switch(config-sys-qos)# service-policy type network-qos jumbo
