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New Member

Nexus 5624Q and 2248TP-E, FEX interfaces not showing up

This is driving me crazy and I hope some one can answer this. I'm working with a Nexus 5624Q and a 2248TP-E FEX. I'm trying to get the 5k to communicate with the 2k and show the interfaces. Below I included my configuration. I've done the break out command, I've done the port channel, I've connected all 4 10G connections to the uplinks and they are all showing green but then drop to link not connected after a few minutes. I've read every documentation and tried max links 4 with out port channel and even attempted to try VPC but still cannot get the fex interfaces to show up... what am I missing?

switch(config-if)# sh int po100 fex-intf 
Fabric           FEX
Interface        Interfaces
---------------------------------------------------
 Po100          
switch(config-if)# sh run
!Command: show running-config
!Time: Sat Jan 27 21:33:14 2001
version 7.1(0)N1(1b)
interface breakout slot 1 port 1-12 map 10g-4x
hostname switch
no feature telnet
cfs eth distribute
feature lldp
feature fex
username admin password 5 $1$lA3Ufc0l$8gqZmFwXyYZKyjQ7Gt5Ha.  role network-admin
no password strength-check
ip domain-lookup
fex 100
  pinning max-links 1
  description "FEX 100"
snmp-server user admin network-admin auth md5 0xff5615dc29622bf9811e35075902a51d
 priv 0xff5615dc29622bf9811e35075902a51d localizedkey
vlan 1
vrf context management
interface port-channel100
  switchport mode fex-fabric
  fex associate 100
interface Ethernet1/1/1
interface Ethernet1/1/2
interface Ethernet1/1/3
interface Ethernet1/1/4
interface Ethernet1/2/1
interface Ethernet1/2/2
interface Ethernet1/2/3
interface Ethernet1/2/4
interface Ethernet1/3/1
interface Ethernet1/3/2
interface Ethernet1/3/3
interface Ethernet1/3/4
interface Ethernet1/4/1
interface Ethernet1/4/2
interface Ethernet1/4/3
interface Ethernet1/4/4
interface Ethernet1/5/1
interface Ethernet1/5/2
interface Ethernet1/5/3
interface Ethernet1/5/4
interface Ethernet1/6/1
interface Ethernet1/6/2
interface Ethernet1/6/3
interface Ethernet1/6/4
interface Ethernet1/7/1
interface Ethernet1/7/2
interface Ethernet1/7/3
interface Ethernet1/7/4
interface Ethernet1/8/1
interface Ethernet1/8/2
interface Ethernet1/8/3
interface Ethernet1/8/4
interface Ethernet1/9/1
interface Ethernet1/9/2
interface Ethernet1/9/3
interface Ethernet1/9/4
interface Ethernet1/10/1
interface Ethernet1/10/2
interface Ethernet1/10/3
interface Ethernet1/10/4
interface Ethernet1/11/1
  switchport mode fex-fabric
  fex associate 100
  channel-group 100
interface Ethernet1/11/2
  switchport mode fex-fabric
  fex associate 100
  channel-group 100
interface Ethernet1/11/3
  switchport mode fex-fabric
  fex associate 100
  channel-group 100
interface Ethernet1/11/4
  switchport mode fex-fabric
  fex associate 100
  channel-group 100
interface Ethernet1/12/1
interface Ethernet1/12/2
interface Ethernet1/12/3
interface Ethernet1/12/4
interface Ethernet2/1
interface Ethernet2/2
interface Ethernet2/3
interface Ethernet2/4
interface Ethernet2/5
interface Ethernet2/6
interface Ethernet2/7
interface Ethernet2/8
interface Ethernet2/9
interface Ethernet2/10
interface Ethernet2/11
interface Ethernet2/12
interface mgmt0
  vrf member management
  ip address 192.168.70.250/24
line console
line vty
boot kickstart bootflash:/n6000-uk9-kickstart.7.1.0.N1.1b.bin
boot system bootflash:/n6000-uk9.7.1.0.N1.1b.bin
poap transit

switch(config-if)#    
switch(config-if)# sh int br
--------------------------------------------------------------------------------
Ethernet      VLAN    Type Mode   Status  Reason                   Speed     Por
t
Interface                                                                    Ch
#
--------------------------------------------------------------------------------
Eth1/1/1      1       eth  access down    Transceiver validation fa   10G(D) --
Eth1/1/2      1       eth  access down    Transceiver validation fa   10G(D) --
Eth1/1/3      1       eth  access down    Transceiver validation fa   10G(D) --
Eth1/1/4      1       eth  access down    Transceiver validation fa   10G(D) --
Eth1/2/1      1       eth  access down    Transceiver validation fa   10G(D) --
Eth1/2/2      1       eth  access down    Transceiver validation fa   10G(D) --
Eth1/2/3      1       eth  access down    Transceiver validation fa   10G(D) --
Eth1/2/4      1       eth  access down    Transceiver validation fa   10G(D) --
Eth1/3/1      1       eth  access down    SFP not inserted            10G(D) --
Eth1/3/2      1       eth  access down    SFP not inserted            10G(D) --
Eth1/3/3      1       eth  access down    SFP not inserted            10G(D) --
Eth1/3/4      1       eth  access down    SFP not inserted            10G(D) --
Eth1/4/1      1       eth  access down    SFP not inserted            10G(D) --
Eth1/4/2      1       eth  access down    SFP not inserted            10G(D) --
Eth1/4/3      1       eth  access down    SFP not inserted            10G(D) --
Eth1/4/4      1       eth  access down    SFP not inserted            10G(D) --
Eth1/5/1      1       eth  access down    SFP not inserted            10G(D) --
Eth1/5/2      1       eth  access down    SFP not inserted            10G(D) --
Eth1/5/3      1       eth  access down    SFP not inserted            10G(D) --
Eth1/5/4      1       eth  access down    SFP not inserted            10G(D) --
Eth1/6/1      1       eth  access down    SFP not inserted            10G(D) --
Eth1/6/2      1       eth  access down    SFP not inserted            10G(D) --
Eth1/6/3      1       eth  access down    SFP not inserted            10G(D) --
Eth1/6/4      1       eth  access down    SFP not inserted            10G(D) --
Eth1/7/1      1       eth  access down    SFP not inserted            10G(D) --
Eth1/7/2      1       eth  access down    SFP not inserted            10G(D) --
Eth1/7/3      1       eth  access down    SFP not inserted            10G(D) --
Eth1/7/4      1       eth  access down    SFP not inserted            10G(D) --
Eth1/8/1      1       eth  access down    SFP not inserted            10G(D) --
Eth1/8/2      1       eth  access down    SFP not inserted            10G(D) --
Eth1/8/3      1       eth  access down    SFP not inserted            10G(D) --
Eth1/8/4      1       eth  access down    SFP not inserted            10G(D) --
Eth1/9/1      1       eth  access down    SFP not inserted            10G(D) --
Eth1/9/2      1       eth  access down    SFP not inserted            10G(D) --
Eth1/9/3      1       eth  access down    SFP not inserted            10G(D) --
Eth1/9/4      1       eth  access down    SFP not inserted            10G(D) --
Eth1/10/1     1       eth  access down    SFP not inserted            10G(D) --
Eth1/10/2     1       eth  access down    SFP not inserted            10G(D) --
Eth1/10/3     1       eth  access down    SFP not inserted            10G(D) --
Eth1/10/4     1       eth  access down    SFP not inserted            10G(D) --
Eth1/11/1     1       eth  fabric down    Link not connected          10G(D) 100
Eth1/11/2     1       eth  fabric down    Link not connected          10G(D) 100
Eth1/11/3     1       eth  fabric down    Link not connected          10G(D) 100
Eth1/11/4     1       eth  fabric down    Link not connected          10G(D) 100
Eth1/12/1     1       eth  access down    SFP not inserted            10G(D) --
Eth1/12/2     1       eth  access down    SFP not inserted            10G(D) --
Eth1/12/3     1       eth  access down    SFP not inserted            10G(D) --
Eth1/12/4     1       eth  access down    SFP not inserted            10G(D) --
Eth2/1        1       eth  access down    Transceiver validation fa   40G(D) --
Eth2/2        1       eth  access down    Transceiver validation fa   40G(D) --
Eth2/3        1       eth  access down    SFP not inserted            40G(D) --
Eth2/4        1       eth  access down    SFP not inserted            40G(D) --
Eth2/5        1       eth  access down    SFP not inserted            40G(D) --
Eth2/6        1       eth  access down    SFP not inserted            40G(D) --
Eth2/7        1       eth  access down    SFP not inserted            40G(D) --
Eth2/8        1       eth  access down    SFP not inserted            40G(D) --
Eth2/9        1       eth  access down    SFP not inserted            40G(D) --
Eth2/10       1       eth  access down    SFP not inserted            40G(D) --
Eth2/11       1       eth  access down    SFP not inserted            40G(D) --
Eth2/12       1       eth  access down    SFP not inserted            40G(D) --
--------------------------------------------------------------------------------
Port-channel VLAN    Type Mode   Status  Reason                    Speed   Proto
col
Interface                                                                 
--------------------------------------------------------------------------------
Po100        1       eth  fabric down    No operational members      auto(D)  no
ne
--------------------------------------------------------------------------------
Port   VRF          Status IP Address                              Speed    MTU
--------------------------------------------------------------------------------
mgmt0  --           down   192.168.70.250                          --       1500
switch(config-if)#
1 ACCEPTED SOLUTION

Accepted Solutions
New Member

7.1(0)N1(1b) has a bug that

7.1(0)N1(1b) has a bug that prevented me from associating the fex switch. Downgraded to version 7.0(8)N1(1) and now I can associate... I can't select my post as a correct answer but hopefully this helps any one else...

8 REPLIES
New Member

Using sh fex and sh fex

Using sh fex and sh fex details I found the FEX communicating with my 5k switch. The FEX is stuck in a Image Download state and will not go past it. It keeps reboot and I can't get it to stop. The Switch and FEX version are exactly the same.

New Member

Dear Rollen,

Dear Rollen,

After physical wiring done from Parent switch eg. N7k or N5k to Fex , just issue the command Feature Fex , and wait for one minute then check sh fex , fex should be in discover mode , if not in discover then there is a problem in physical cabling

BR

SYED

New Member

switch(config)# sh fex

switch(config)# sh fex detail
FEX: 100 Description: FEX0100   state: Image Download
  FEX version: 7.1(0)N1(1b) [Switch version: 7.1(0)N1(1b)]
  FEX Interim version: 7.1(0)N1(1b)
  Switch Interim version: 7.1(0)N1(1b)
  Module Sw Gen: 12594  [Switch Sw Gen: 21]
  post level: complete
 pinning-mode: static    Max-links: 1
  Fabric port for control traffic: Eth1/11/2
  FCoE Admin: false
  FCoE Oper: true
  FCoE FEX AA Configured: false
  Fabric interface state:
    Po100 - Interface Up. State: Active
    Eth1/11/1 - Interface Down. State: Configured
    Eth1/11/2 - Interface Up. State: Active
    Eth1/11/3 - Interface Up. State: Active
    Eth1/11/4 - Interface Up. State: Active
Logs:
01/26/2001 16:06:24.307467: Image preload successful.
01/26/2001 16:06:25.715170: Deleting route to FEX
01/26/2001 16:06:25.724964: Module disconnected
01/26/2001 16:06:25.726443: Module Offline
01/26/2001 16:06:26.610114: Deleting route to FEX
01/26/2001 16:06:26.617711: Module disconnected
01/26/2001 16:06:26.619794: Offlining Module
01/26/2001 16:06:26.665467: Deleting route to FEX
01/26/2001 16:06:26.673062: Module disconnected
01/26/2001 16:06:26.675214: Offlining Module
01/26/2001 16:06:26.713752: Deleting route to FEX
01/26/2001 16:06:26.721332: Module disconnected
01/26/2001 16:06:26.723529: Offlining Module
01/26/2001 16:06:26.776957: Deleting route to FEX
01/26/2001 16:06:26.784563: Module disconnected
01/26/2001 16:06:26.786788: Offlining Module
01/26/2001 16:07:55.776947: Module register received
01/26/2001 16:07:55.778535: Image Version Mismatch
01/26/2001 16:07:55.779616: Registration response sent
01/26/2001 16:07:55.779920: Requesting satellite to download image
01/26/2001 16:08:26.011337: Deleting route to FEX
01/26/2001 16:08:26.018956: Module disconnected
01/26/2001 16:08:26.021390: Module Offline
01/26/2001 16:08:26.891585: Deleting route to FEX
01/26/2001 16:08:26.899150: Module disconnected
01/26/2001 16:08:26.901298: Offlining Module
01/26/2001 16:08:29.983343: Module register received
01/26/2001 16:08:29.984711: Image Version Mismatch
01/26/2001 16:08:29.985789: Registration response sent
01/26/2001 16:08:29.987794: Requesting satellite to download image
01/26/2001 16:09:03.994177: Module register received
01/26/2001 16:09:03.995535: Image Version Mismatch
01/26/2001 16:09:03.996641: Registration response sent
01/26/2001 16:09:03.998609: Requesting satellite to download image
01/26/2001 16:09:39.764487: Module register received
01/26/2001 16:09:39.765868: Image Version Mismatch
01/26/2001 16:09:39.766934: Registration response sent
01/26/2001 16:09:39.767218: Requesting satellite to download image
01/26/2001 16:10:09.534641: Deleting route to FEX
01/26/2001 16:10:09.542205: Module disconnected
01/26/2001 16:10:09.544163: Module Offline
01/26/2001 16:10:10.660592: Deleting route to FEX
01/26/2001 16:10:10.668215: Module disconnected
01/26/2001 16:10:10.670401: Offlining Module
01/26/2001 16:10:14.488537: Module register received
01/26/2001 16:10:14.489932: Image Version Mismatch
01/26/2001 16:10:14.491027: Registration response sent
01/26/2001 16:10:14.491312: Requesting satellite to download image
01/26/2001 16:10:48.525360: Module register received
01/26/2001 16:10:48.526735: Image Version Mismatch
01/26/2001 16:10:48.527805: Registration response sent
01/26/2001 16:10:48.528087: Requesting satellite to download image
01/26/2001 16:11:22.537272: Module register received
01/26/2001 16:11:22.538666: Image Version Mismatch
01/26/2001 16:11:22.539734: Registration response sent
01/26/2001 16:11:22.540028: Requesting satellite to download image
01/26/2001 16:11:56.567723: Module register received
01/26/2001 16:11:56.569095: Image Version Mismatch
01/26/2001 16:11:56.570168: Registration response sent
01/26/2001 16:11:56.570450: Requesting satellite to download image
01/26/2001 16:12:30.596332: Module register received
01/26/2001 16:12:30.597721: Image Version Mismatch
01/26/2001 16:12:30.598785: Registration response sent
01/26/2001 16:12:30.599070: Requesting satellite to download image
New Member

Thank Syed Aman Hussain, I

Thank Syed Aman Hussain, I tried this and I can see the FEX switch but it is stuck in a Image Download state. I tried two different cables and get the same results.

Also I am using QSFP-4SFP10G-CU5M to connect between the Nexus 5624Q and the 2248TP-E. I don't see this cable on the compatibility matrix for the 2248TP-E but that shouldn't make a difference correct?

New Member

Rollen, 

Rollen, 

Thank you for this post! It just saved my butt. I couldn't figure out what I was doing wrong!!

New Member

Any one?...

Any one?...

New Member

7.1(0)N1(1b) has a bug that

7.1(0)N1(1b) has a bug that prevented me from associating the fex switch. Downgraded to version 7.0(8)N1(1) and now I can associate... I can't select my post as a correct answer but hopefully this helps any one else...

New Member

Found the issue and want to

Found the solution and want to resolve this thread. The problem was with the IOS and not the switch. We downgraded and had no problem after that.

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