cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
2833
Views
0
Helpful
2
Replies

Cant enable auto mdix on FEX port

Craddockc
Level 3
Level 3

Community,

I have a Nexus C2248TP-1GE uplinked to a Nexus 9K, when I try to enable Auto-MDIX on the FEX port I get the following error:

QTS-AGG-1B(config)# int eth104/1/11
QTS-AGG-1B(config-if)# mdix auto
ERROR: Ethernet104/1/11: requested config change not allowed

The reason im trying to enable this is because we have certain servers that when plugged into the port, the port does not come up on the FEX but when we plug a laptop into it, it works fine. These 2K's are single homed so the issue with the interface configs needing to be the same in both core 9K's I believe is avoided.

Any thoughts?

Thanks.

1 Accepted Solution

Accepted Solutions

Mark Malone
VIP Alumni
VIP Alumni

Yes its not supported looking at its capabilities on my fexs , 2232 model is the same

5ks don't have the command either when I check

maybe you just need a crossover  ?

# sh interface Ethernet101/1/23 capabilities
Ethernet101/1/23
  Model:                 N2K-C2248TP-1GE
  Type (Non SFP):        10/100/1000BaseT
  Speed:                 10,100,1000,auto
  Duplex:                full
  Trunk encap. type:     802.1Q
  Channel:               yes
  Broadcast suppression: no
  Flowcontrol:           rx-(off/on),tx-(off/on)
  Rate mode:             none
  QOS scheduling:        rx-(6q1t),tx-(1p6q0t)
  CoS rewrite:           no
  ToS rewrite:           no
  SPAN:                  yes
  UDLD:                  no
  MDIX:                  no
  Link Debounce:         yes
  Link Debounce Time:    yes
  dot1Q-tunnel mode:     yes
  Pvlan Trunk capable:   yes
  TDR capable:           no
  FabricPath capable:    no
  Port mode:             Switched
  FEX Fabric:            no

View solution in original post

2 Replies 2

Mark Malone
VIP Alumni
VIP Alumni

Yes its not supported looking at its capabilities on my fexs , 2232 model is the same

5ks don't have the command either when I check

maybe you just need a crossover  ?

# sh interface Ethernet101/1/23 capabilities
Ethernet101/1/23
  Model:                 N2K-C2248TP-1GE
  Type (Non SFP):        10/100/1000BaseT
  Speed:                 10,100,1000,auto
  Duplex:                full
  Trunk encap. type:     802.1Q
  Channel:               yes
  Broadcast suppression: no
  Flowcontrol:           rx-(off/on),tx-(off/on)
  Rate mode:             none
  QOS scheduling:        rx-(6q1t),tx-(1p6q0t)
  CoS rewrite:           no
  ToS rewrite:           no
  SPAN:                  yes
  UDLD:                  no
  MDIX:                  no
  Link Debounce:         yes
  Link Debounce Time:    yes
  dot1Q-tunnel mode:     yes
  Pvlan Trunk capable:   yes
  TDR capable:           no
  FabricPath capable:    no
  Port mode:             Switched
  FEX Fabric:            no

Thanks for the clarification Mark!

Review Cisco Networking for a $25 gift card