Enabling The Jumbo Mtu; Verifying The Jumbo Mtu - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Enabling the Jumbo MTU

Enabling the Jumbo MTU
You can enable the jumbo MTU for the whole switch by setting the MTU to its maximum size (9216 bytes)
in the policy map for the default Ethernet system class (class-default).
This example shows how to configure the default Ethernet system class to support the jumbo MTU:
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
The system jumbomtu command defines the maximum MTU size for the switch. However, jumbo MTU
Note
is only supported for system classes that have MTU configured.

Verifying the Jumbo MTU

To verify that the jumbo MTU is enabled, enter the show interface ethernet slot/port command for an
Ethernet interface that carries traffic with jumbo MTU.
This example shows how to display summary jumbo MTU information for Ethernet 1/2 (the relevant part of
the output is shown in bold font):
switch# show interface ethernet 1/2
Ethernet1/2 is up
...
...
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
444
Rx
1547805598 Input Packets 1547805596 Unicast Packets 0 Multicast Packets
0 Broadcast Packets 1301767362 Jumbo Packets 33690 Storm Suppression Packets
7181776513802 Bytes
Tx
1186564478 Output Packets 7060 Multicast Packets
0 Broadcast Packets 997813205 Jumbo Packets
4813632103603 Bytes
Configuring System Classes
OL-16597-01