Emulex 10 Gb link negotiates to 1 Gb with Cisco Nexus 4001i - IBM Servers



Source

RETAIN tip: H21660

Symptom

Any of the Emulex 10 Gbs NICs listed may intermittently connect to a Cisco Nexus 4001i switch at 1 Gbs instead of 10 Gbs when auto-negotiation is enabled on the switch ports.

Affected configurations

The system may be any of the following IBM servers:

  • BladeCenter HS22, type 1911, any model
  • BladeCenter HS22, type 1936, any model
  • BladeCenter HS22, type 7870, any model
  • BladeCenter HS22V, type 1949, any model
  • BladeCenter HS22V, type 7871, any model
  • BladeCenter HS23, type 1929, any model
  • BladeCenter HS23, type 7875, any model
  • BladeCenter HS23E, type 8038, any model
  • BladeCenter HS23E, type 8039, any model

The system is configured with one or more of the following IBM Option part numbers:

  • Cisco Nexus 4001I Switch Module for IBM BladeCenter, Option part number 46M6071, any replacement part number
  • Emulex 10 Gb Ethernet Virtual Fabric Adapter Advanced II for IBM BladeCenter HS23, Option part number 90Y9332, any replacement part number
  • Emulex 10 Gb Ethernet Virtual Fabric Adapter Advanced II for IBM BladeCenter, Option part number 90Y3566, any replacement part number
  • Emulex 10 Gb Ethernet Virtual Fabric Adapter II for IBM BladeCenter HS23, Option part number 81Y3120, any replacement part number
  • Emulex 10 Gb Ethernet Virtual Fabric Adapter II for IBM BladeCenter, Option part number 90Y3550, any replacement part number
  • Emulex Dual-Port 10 Gb Virtual Fabric Adapter Advanced II for IBM BladeCenter, Option part number 00Y3264, any replacement part number
  • Emulex Dual-Port 10 Gb Virtual Fabric Adapter II for IBM BladeCenter, Option part number 00Y3266, any replacement part number

This tip is not software specific.

The system has the symptom described above.

Workaround

Disable auto-negotiation on the Cisco Nexus port and set the speed on the port to 10000.

The command to accomplish this on the relevant port is 'speed 10000 '

This is a permanent limitation.

Refer to the switch configuration guide for any further details.

Applicable countries and regions

 


Document id:  MIGR-5093561
Last modified:  2013-08-28
Copyright © 2014 IBM Corporation