Cisco Nexus N9K-C93180YC-FX does not active 25Gb Nutanix Node Conn.

[Samuel Berhanu]

My question focuses on the Cisco Nexus Switch N9K-C93180YC-FX does not support 25Gb Nutanix node connection why not.

But the interface change to 10Gb the connection is active why 25Gb not working the model N9K-C93180YC-FX is 25Gb support switch description.

[Kasun Bandara]

N9K-C93180YC-FX  is a 25G supported switch. what are the SFP transceivers you are using for Nutanix and Switch? any console messages when plugging transceivers to switch? check log for any messages related to port.

[Samuel Berhanu]

Detail Device model and DAC cable   

  1.1   Cisco Switch Model = Nexus N9K-C93180YC-FX

  1.2   DAC Cable = Cisco SFP-H25G-CU5M

Inteface configuration change to 10Gb it works does not function with 25Gb.

[Kasun Bandara]

what are the logs you are seeing at both ends when cables connecting.

[Samuel Berhanu]

This is current solution for some one recommended FEX (Fabric Extended ) i try to change Tor to FEX mode :-

TOR/Switch to FEX Conversion

=========================

Cisco Nexus switches in software FEX mode support 25G FEX connectivity to the host for a single point of management use cases.

Convert the switch usage from TOR/switch mode to FEX mode.

A sample TOR to FEX conversion is provided below.

switch(config)# no boot nxos

switch(config)# copy running-config startup-config

switch(config)# boot fex

switch(config)# reload

[marce1000]

  - When you investigate , check logs and or Networking Events on Nutanix (too).

 M.

[balaji.bandi]

as long as both the side same mode communication it should work.

make sure you have not set the port speed to 10GB, in the config.

Does SFO recognise as 25GB on nexus without any error disabled ?

[Samuel Berhanu]

Configuration File 

==============

1. 10Gb functionally works  force to change 

==================================

!

interface port-channel404
switchport
switchport mode trunk
switchport trunk native vlan 602
switchport trunk allowed vlan 602-603
spanning-tree port type edge trunk
mtu 9216
speed 10000
no lacp suspend-individual

!
interface Ethernet1/1
switchport
switchport mode trunk
switchport trunk native vlan 602
switchport trunk allowed vlan 602-603
mtu 9216
speed 10000
channel-group 404 mode active
no shutdown

!

interface Ethernet1/2
switchport
switchport mode trunk
switchport trunk native vlan 602
switchport trunk allowed vlan 602-603
mtu 9216
speed 10000
channel-group 404 mode active
no shutdown

!

2. 25Gb not working 

================

!

interface port-channel404
switchport
switchport mode trunk
switchport trunk native vlan 602
switchport trunk allowed vlan 602-603
spanning-tree port type edge trunk
no lacp suspend-individual

!
interface Ethernet1/1
switchport
switchport mode trunk
switchport trunk native vlan 602
switchport trunk allowed vlan 602-603

channel-group 404 mode active
no shutdown

!

interface Ethernet1/2
switchport
switchport mode trunk
switchport trunk native vlan 602
switchport trunk allowed vlan 602-603
channel-group 404 mode active
no shutdown

!

Note = cable type is DAC Cable = Cisco SFP-H25G-CU5M