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Jumbo Frames - nexus 5010

how to configure jumbo frames on the Nexus 5010 with Netapp?

6 REPLIES
Cisco Employee

Jumbo Frames - nexus 5010

Hello Abillo

All you need to do is put this configuration on all your nexus 5ks:

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

This will globally enable jumbo frames.

To  verify whether it works, do a "show int eth x/y", you should see the jumbo counters increasing.

Also  note that the mtu won't change on the interface itself, its a global  command, not a 'per interface' command. But thats ok, even if mtu says  1500 it can still accept jumbo frames if you have the global config  applied.

Example:

Ethernet1/1 is up

...

  RX

      0 unicast packets  1221713 multicast packets  2644 broadcast packets

      1224357 input packets  91236171 bytes

---> 458 jumbo packets  0 storm suppression packets

      0 giants  0 input error  0 short frame  0 overrun   0 underrun

      0 watchdog  0 if down drop

      0 input with dribble  0 input discard

      0 Rx pause

Please refer to this link:

http://www.cisco.com/en/US/products/ps9670/products_configuration_example09186a0080b44116.shtml

Hope that will help you.

Alex

New Member

Jumbo Frames - nexus 5010

Thank you Alex!!!

I applied the setting in N5k and is working normally.

Cisco Employee

Jumbo Frames - nexus 5010

You are welcome Abilio.

Alex

New Member

Jumbo Frames - nexus 5010

Can I ask one question that sort of applies to this?  Is it possible to setup jumbo frames on a Nexus 5010 by creating a new VLAN while still leaving the other VLANs on the switch without jumbo frames enabled?  We'd like to use 10 GB connections with jumbo frames to our filer while using the 1 GB ports to connect to other devices.  Any assistance would be appreciated.

Jeff

Re: Jumbo Frames - nexus 5010

You can change MTU for traffic using different COS values, for example

if you can mark on the server side a cos value on this vlan, then you

can apply the MTU change for it, but there is vlan matching criteria on

the switch to adjust the MTU.

New Member

Jumbo Frames - nexus 5010

The other way to check this is ping from NetApp to the Nexus switch with a packet size of 10000.

netapp>ping -s packetsize 10000

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