Problem wih channel-port on Nexus5000

[joyride_us2]

Hi,

I have 2 Nexus5000 completed with 2 nexus 2000.

I am trying to get a vPC up between both.

On the nexus 5000 :

Int eth103/1/13

switchport mode trunk

switchtrunk trunk native vlan 110

switchport trunk allowed 2,3,4

channel-group 121 mode active

interface port-channel 121

switchport trunk native vlan 110

switch trunk allowed vlan 2,3,4

vpc 121

On the other nexus :

interface eth104/1/12

switchport mode trunk

switch trunk  native vlan 110

switchport trunk allowed vlan  2,3,4

channel-group 121 mode active

Interface po121

switch mode trunk

switchport trunk native vlan 110

switchport trunk allowed vlan 2,3,4

vpc 121

Sh int ethernet104/1/12 >> up and up

sh int po121 >> down and down (no operational members)

why?

:)

thanks!

[Mark Malone]

Hey the config is wrong for a fex thats a standard po you configured split across the vpc that wont work for fex setup

heres an example of what it should be

same config on each 5k and make sure 2k is dual homed to both 5ks

  fex associate 101
  switchport mode fex-fabric

interface Ethernet3/1
  description FEX101
  switchport mode fex-fabric
  fex associate 101
  logging event port link-status
  channel-group 101

interface port-channel101
  description FEX101
  switchport mode fex-fabric
  fex associate 101
  logging event port link-status
  vpc 101

[joyride_us2]

thanks Mark!

the switch answers :

error. fabric mode not supported for interface type

when I enter the 'switchport mode fabric'

[Mark Malone]

have you tried just enabling the port for switching first with switchport(hit return) on its own then try apply the switchport mode fex-fabric

[joyride_us2]

>int ethernet103/1/13

   >fex associate 199

ERROR : Failed

>int ethernet103/1/13

  >switchport mode fex-fab

error : fabric mode not supported for this interface type

>show run int eth103/1/13

  >interface eth103/1/13

>

(I am sorry if  appear a bit dum, but I am just back for a 18months brain damage...trying to make up for the delay...)

[Mark Malone]

oh shit yeah :) only coped it your trying to configure a fex port thats already part of the 2k to be a fex

you need to use a standard 5k port if your connecting up a 2k fex to a 5k like mine above it cant be a 103 port as thats already part of fex 103 2k switch103 , needs to be normal port like e3/1

[joyride_us2]

Misunderstanding. a N2k is connecting to a N5K. I think the 103 port is an N2K one.

Still, it remains that this port must be a part of a channel-group. This Ethernet port comes up nice but the channel-group remains down for unidentified reason! :)

(the 103 port is mandatory!) 

[joyride_us2]

Sorry...the 2k is already connected to the 5k and the connection looks good.

Now, it is just the server that has a teaming connected to a port-channel (on the FEX) that does not work.

thank you for your patience...

[joyride_us2]

More details : I have 2 Nexus 5000 connected each to several 2000.

A Citrix server has 2 ports out connected to the 2*2000 FEX. Each ethernet port is up and looks good.

However, when I try to join the 2 Ethernet ports into 1 channel-group, the ethernet ports are up but the channel-group is down for unknown reasons!

I am sorry for the poor language.

[Mark Malone]

hey can you post the config you have set on both ports on the 2ks for the citrix server

[joyride_us2]

with pleasure :

for the first N5K (andN2K) :

interface Ethernet104/1/2

switch mode trunk

switchport trunk native vlan 100

switchport trunk allowed vlan 102,100

channel-group 200 mode active

Int Po200

switch mode trunk

switch trunk native vlan 100

switchport trunk allowed vlan 102,100

vpc 200

On the other N5K (and N2K) :

interface ethernet 105/1/2

switchport mode trunk

switchport trunk native vlan 100

switchport trunk allowed vlan 102,100

channel-group 200 mode active

interface Port-channel 200

switch port mode trunk

switch trunk native vlan 100

switchport trunk allowed vlan 102,100

vpc 200

>show int po200

port-channel200 is down (No operational members)

...

[Mark Malone]

you dont need a vpc on a 2k port as its already part of FEX vpc domain , try remove that vpc 200 under po see if it brings up the etherhcannel

[Mark Malone]

did that bring up the port-channel ?

[joyride_us2]

Hmmm...do you mean on the N5000 (that also contains the N2K config) ?

[joyride_us2]

If so, no sorry Po200 still down!