QSFP PORT40G Nexus 3000

[admin@atrinnet.net]

Hi Dear I have Switch Nexus 3064 With 4 Qsfp port

I want Up 1 40G interface But o switch interface have 4 Sub interface

My Question IS  I Have Two CISCO  LR 40G module With LC connector

If connect To the switch And inteface Up For 40g

I have One 40Gbps Inteface ?

Or 4 Sub Interface  10g And Must be Create Etherchannel between Them ?

THX

??

[Reza Sharifi]

Hi,

If both switches support 40Gig, than you only need one 40Gig interface to connect the switches together. If one of the switches support 10Gig only, then you need to create a Portchannle and add all 4 10Gig interfaces to it.

HTH

[admin@atrinnet.net]

When i run show interfaces status on QSFP 

Port have 4 sub interface

If Two switch support 40Gbps speed And Have Qsfp port  Whitch Sub Interface Connected And must be config????

Eth1/50/1 -- xcvrAbsen 1 auto auto --
Eth1/50/2 -- xcvrAbsen 1 auto auto --
Eth1/50/3 -- xcvrAbsen 1 auto auto --
Eth1/50/4 -- xcvrAbsen 1 auto auto --

[Christopher Hart · Accepted solution]

Hello!

It looks like this particular Nexus 3064 is configured with a default hardware profile of 64x10G. In this mode, the four QSFP ports are automatically broken out into 4x10G ports each. This is why you are seeing Eth1/50 broken out into four 10G interfaces.

You can confirm this with the following command, as shown from a Nexus 3064 in my lab running NX-OS software release 7.0(3)I7(8):

N3K-C3064PQ# show running-config all | include hardware.profile.portmode
hardware profile portmode 64x10G

In order for Eth1/50 to act as a single 40G interface instead of being broken out into 4x10G interfaces, we need to modify the hardware profile. This can be done with the hardware profile portmode command. The options for this command are shown here:

N3K-C3064PQ# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
N3K-C3064PQ(config)# hardware profile portmode ?
  48x10g+4x40g  48x10G+4x40G port mode
  52x10g+3x40g  52x10G+3x40G port mode
  56x10g+2x40g  56x10G+2x40G port mode
  60x10g+1x40g  60x10G+1x40G port mode
  64x10g        64x10G port mode

You can configure all four QSFP ports to act as 40G interfaces by applying the following configuration:

N3K-C3064PQ# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
N3K-C3064PQ(config)# hardware profile portmode 48x10g+4x40g 
Warning: This command will take effect only after saving the configuration and reload! Port configurations could get lost when port mode is changed! We suggest you clean up the impacted interfaces config and redo them after boot up! 

As the CLI suggests, you will need to save the configuration of the switch via the copy running-config startup-config command and reload the switch via the reload command in order for the four QSFP ports to act as individual 40G interfaces.

I hope this helps!

-Christopher