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New Member

NX-OS on 3048 does not support pruning


We have an existing TRUNK link, set for "switchport mode trunk" on e1/49 and e1/50 (2 main uplinks). They are acutally working right now. However, we are getting a ton of broadcast packets on the uplinks because we host VM's which require vlans to be added to the TOR's, so when we attempt to prune or filter the vlan allowed list to reduce the broadcasts down, the commands are not present.


version 5.0(3)U3(2a)

interface Ethernet1/50

  description INFRA:TRUNK:fake-x7ag-1b:e3/9

  lacp rate fast

  switchport mode trunk

  logging event port link-status

  logging event port trunk-status

  udld disable

  channel-group 1 mode active

  no shutdown


Then when attempting to configure anything related to "switchport", it doesnt recognize the command: Basically, it wont even take "switchport" and then enter.

fake-x34-1-61# conf t

Enter configuration commands, one per line.  End with CNTL/Z.

fake-x34-1-61(config)# int e1/50

fake-x34-1-61(config-if)# switchport


% Incomplete command at '^' marker.

fake-x34-1-61(config-if)# switchport ?

  host     Set port host

  monitor  Configures an interface as span-destination


So, how is this possible if I'm already a working trunk interface currently? Also, there isnt a feature I found that turns pruning/filtering on per say.

What is the recommended way to do this pruning if its not supported? This link says it should work fine (and I would think it would too).

More information for those wanting it:


  BIOS:      version 1.2.0

  loader:    version N/A

  kickstart: version 5.0(3)U3(2a)

  system:    version 5.0(3)U3(2a)

  power-seq: Module 1: version v4.4

  BIOS compile time:       08/25/2011

  kickstart image file is: bootflash:/n3000-uk9-kickstart.5.0.3.U3.2a.bin

  kickstart compile time:  6/12/2012 19:00:00 [06/12/2012 19:25:54]

  system image file is:    bootflash:/n3000-uk9.5.0.3.U3.2a.bin

  system compile time:     6/12/2012 19:00:00 [06/12/2012 20:08:52]


  cisco Nexus 3048 Chassis ("48x1GE + 4x10G Supervisor")

  Intel(R) Celeron(R) CPU      with 4007288 kB of memory.


Confused in space

Everyone's tags (4)

Re:NX-OS on 3048 does not support pruning

Since the port is in a port-channel, you will need to make the change in the port-channel interface, in this case port-channel 1. This is a nice feature they introduced with NX-OS to prevent port-channel port mismatches.

On classic IOS, it allows you to prune VLANs on individual ports in a port-channel, but it brings down the port channel because the individual interface configurations don't match.

Sent from Cisco Technical Support Android App

New Member

NX-OS on 3048 does not support pruning

switch(config)# show interface Ethernet 1/4 switchport

switch(config)#switchport trunk pruning vlan [add | remove | except | none |all] VLAN-IDs