08-11-2011 05:55 AM - edited 03-07-2019 01:39 AM
I am working on configuring NX7000 + NX2000.
I am following "Configuring the Cisco Nexus 2000 Series Fabric Extender" manual.
As in manual :
Information About Associating a Fabric Extender to a Fabric Interface
A Cisco Nexus 2000 Series Fabric Extender is connected to its parent device through a port channel. By
default, the parent device does not allow the attached Fabric Extender to connect until it has been assigned a
FEX-number and is associated with the connected interface.
Examples
This example shows how to associate the Fabric Extender to a port channel interface on the parent device:
switch# configure terminal
switch(config)# interface port-channel 4
switch(config-if)# switchport mode fex-fabric
switch(config-if)# fex associate 100
switch(config-if)# exit
switch(config)# interface ethernet 1/37
switch(config-if)# switchport mode fex-fabric
switch(config-if)# fex associate 100
switch(config-if)# channel-group 4
switch(config-if)# exit
switch(config)# interface ethernet 1/38
switch(config-if)# switchport mode fex-fabric
switch(config-if)# fex associate 100
switch(config-if)# channel-group 4
switch(config-if)# exit
switch(config)# interface ethernet 1/39
switch(config-if)# switchport mode fex-fabric
switch(config-if)# fex associate 100
switch(config-if)# channel-group 4
switch(config-if)# exit
switch(config)# interface ethernet 1/40
switch(config-if)# switchport mode fex-fabric
switch(config-if)# fex associate 100
switch(config-if)# channel-group 4
switch(config-if)# exit
Question:
1. Is it mandatory using 4 ethernet ports to configure port-channel ?
2. (if not) Can I use only 2 ethernet ports to configure port-channel ?
3. I have got an error following example. It was necessary cli command "sw" before "switchport mode fex-fabric".
Thanks in advance.
Rosa
Solved! Go to Solution.
08-22-2011 10:18 AM
08-11-2011 07:55 AM
You can use 2 ports. It will increase the oversubcription ratio for devices connected to the N2K.
You need to issue switchport first because the default port configuration on the N7K is no switchport. You can check the default port configuration by using the show run interface x/x all. Here is an example:
Pri-DC-Routing-1# sh run int e1/5 all
!Command: show running-config interface Ethernet1/5 all
!Time: Thu Aug 11 19:41:02 2011
version 5.1(3)
interface Ethernet1/5
no description
shutdown
lacp port-priority 32768
lacp rate normal
cdp enable
no switchport
speed auto
duplex auto
rate-mode shared force
flowcontrol receive off
flowcontrol send off
no link debounce
no beacon
mtu 1500
delay 1
snmp trap link-status
logging event port link-status default
logging event port trunk-status default
bandwidth 10000000
no bandwidth inherit
mdix auto
storm-control broadcast level 100
storm-control multicast level 100
storm-control unicast level 100
load-interval counter 1 30
load-interval counter 2 300
no load-interval counter 3
no mac-address
medium broadcast
service-policy type queuing input default-in-policy
service-policy type queuing output default-out-policy
HTH,
jerry
08-22-2011 09:40 AM
Hi Jerry.
As I have a very few number os spfs, I do like to ask (something a litle bit stupid) if is it possible to configure port-channel using just one ethernet port on Nexus 7000.
Thanks in advance.
Rosa
08-22-2011 10:18 AM
Yes, it is possible.
HTH,
jerry
08-22-2011 11:43 AM
Thanks a lot.
Regards,
Rosa
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