05-25-2010 01:39 PM
Hello everyone.
I currently upgraded my nexus 5020's to the new version of NX-OS 4.2(1)N1.1. Everything upgraded pretty well as far as I can see.
Now i've been asked to set up Jumbo Frames on the two 5k's. Keep in mind the two 5020's are not running a VPC setup. There is no
connection directly from one 5020 to the other. They both head to dual 6509's running VSS. My question is, in order to set up Jumbo frames
switch wide...do i need to do this by entering the following?
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
Also, I would assume this would take care of setting all interfaces to allow Jumbo frames, but when I look at
MTU size when doing sho interfaces, it's still showing 1500. I was just curious, since this is policy based
will it show the new MTU size?
In addition, will I have to do anything in order to allow Jumbo frames on my nexus 2k top of rack switches?
Since these are controlled by the 5k's, will my above commands take care of that for the 2k's?
Thanks in advance,
Solved! Go to Solution.
05-25-2010 03:37 PM
Enable jumbo you have it right:
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
show interface ethernet x/y will display under the jumbo counters the information about jumbo packets.
Nothing to do for the N2K, this command enables it globally.
----
Please support CSC Helps Haiti
https://supportforums.cisco.com/docs/DOC-8895
05-25-2010 03:37 PM
Enable jumbo you have it right:
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
show interface ethernet x/y will display under the jumbo counters the information about jumbo packets.
Nothing to do for the N2K, this command enables it globally.
----
Please support CSC Helps Haiti
https://supportforums.cisco.com/docs/DOC-8895
05-26-2010 04:30 AM
Thank you Lucien for the help. It's nice to be able receive confirmation on a subject that I dont know a lot about.
Thanks again.
01-20-2011 01:08 PM
What if I want to enable jumbo frame per interface? On my Nexus 5020, I only want use 10 ports with jumbo frames and the rest with a regular 1500 MTU size. Will a global enable like this impact the 1500 MTU frames on the interfaces not using the larger 9216 MTU size?
01-24-2011 12:13 PM
Jumbo is only global on N5K at this time.
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