N2K-C2248TP-E-1GE FEX Not Supported on N7K Series Routers

Introduction

This document describes a problem encountered where a Cisco Nexus 2000 Series Gigabit Ethernet Fabric Extender (N2K-C2248TP-E-1GE FEX) does not come online when connected to Nexus 7000 Series router and provides a possible solution to the problem.

Prerequisites

Requirements

Cisco recommends that you have knowledge of the Cisco Nexus Operating System (NX-OS) CLI.

Components Used

The information in this document is based on these software and hardware versions:

• Any Nexus 7000 Series Router
• N2K-C2248TP-E-1GE FEX

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Problem

A N2K-C2248TP-E-1GE FEX does not come online when connected to Nexus 7000 Series router, and the state of the Fabric Extender (FEX) appears as Image Download:

N7K# show fex 100 detail
FEX: 100 Description: FEX100   state: Image Download
  FEX version: 5.1(3)N2(1b) [Switch version: 5.1(5)]
  FEX Interim version: 5.1(3)N2(1b)
  Switch Interim version: 5.1(5)
  Module Sw Gen: 21  [Switch Sw Gen: 21]
 pinning-mode: static    Max-links: 1
  Fabric port for control traffic: Eth2/29
  Fabric interface state:
    Po30 - Interface Up. State: Active
    Eth2/21 - Interface Up. State: Active
    Eth2/29 - Interface Up. State: Active
  Fex Port        State  Fabric Port  Primary Fabric

Logs:
08/07/2013 13:01:06.88746: Module Offline
08/07/2013 13:01:06.100565: Deleting route to FEX
08/07/2013 13:01:06.105191: Module disconnected
08/07/2013 13:01:06.109943: Offlining Module
08/07/2013 13:01:40.190901: Module register received
08/07/2013 13:01:40.192222: Registration response sent
08/07/2013 13:01:40.192512: Requesting satellite to download image
08/07/2013 13:01:44.210316: Module register received
08/07/2013 13:01:44.211137: Registration response sent
08/07/2013 13:01:44.211344: Requesting satellite to download image
08/07/2013 13:01:50.230455: Module register received
08/07/2013 13:01:50.231267: Registration response sent
08/07/2013 13:01:50.231467: Requesting satellite to download image
08/07/2013 13:01:58.486741: Module register received
08/07/2013 13:01:58.487977: Registration response sent
08/07/2013 13:01:58.488188: Requesting satellite to download image
08/07/2013 13:02:08.731982: Module register received
08/07/2013 13:02:08.732792: Registration response sent
08/07/2013 13:02:08.732990: Requesting satellite to download image
08/07/2013 13:02:20.830203: Module register received
08/07/2013 13:02:20.831182: Registration response sent
08/07/2013 13:02:20.831383: Requesting satellite to download image

If you perform a Debug fex, you receive these errors also:

Debug fex error: output

2013 Aug  6 18:04:22.931029 fex: Reg resp: Failed to get card info for swcardid 149
2013 Aug  6 18:04:27.000098 fex: Cardinfo: Unknown card id to get (149)
2013 Aug  6 18:04:27.000130 fex: Reg resp: Failed to get card info for swcardid 149
2013 Aug  6 18:04:33.275629 fex: Cardinfo: Unknown card id to get (149)
2013 Aug  6 18:04:33.275662 fex: Reg resp: Failed to get card info for swcardid 149
2013 Aug  6 18:04:41.550785 fex: Cardinfo: Unknown card id to get (149)
2013 Aug  6 18:04:41.550817 fex: Reg resp: Failed to get card info for swcardid 149
2013 Aug  6 18:04:51.794688 fex: Cardinfo: Unknown card id to get (149)
2013 Aug  6 18:04:51.794720 fex: Reg resp: Failed to get card info for swcardid 149

Solution

The N2K-2248TP-E FEX is not supported on Nexus 7000 Series routers until NX-OS Version 6.1(1). The fix for this issue is to upgrade to NX-OS Version 6.1(1) or later. After you complete the upgrade, the FEXs will come online.

The third table in the Cisco Nexus 2000 Series Fabric Extenders Data Sheet describes the minimum version of code needed for the N2K-2248TP-E.