Topic
  • 2 replies
  • Latest Post - ‏2013-10-02T16:37:06Z by T_IBM2002
T_IBM2002
T_IBM2002
3 Posts

Pinned topic Qlogic 8GB Pass-Through Module Load Balancing

‏2013-09-28T15:15:38Z |

Hello Everyone,

Having an issue implementing an FC load balancing configuration on a number of blade centers.   Here is the setup/environment.  We are using 2 FC ports per pass-thru module (external TF ports 0 and 15) connected directly to the core Cisco MDS 9506 with NPIV enabled.  The Bay 3 PT module connects to Fabric A switch and the Bay 4 PT connects to Fabric B switch.  The 14 internal ports (TH) are configured as follows:

Configuration Name: default
  -------------------
 
  Port Number: 1
  ------------
  AdminState           Online
  LinkSpeed            Auto
  PortType             TH
  PrimaryTFPortMap     0,15
  BackupTFPortMap      None
  SymbolicName         Port1

 

The problem is that we are only seeing traffic on the external port 0 and nothing on port 15 on Bay3 and the oppisite on Bay 4.  Essentially we are only using 2 out of 4 FC ports.  This is obviously overloading those 2 ports.  According to the pass-through docs and IBM Redbook we should be able to assign multiple TF ports to each TH port for a load balance (active/active) setup instead of the default  Primary  0,  Backup 15. (fail-over)  btw,   we made the configuration changes, save it and activated.  Any insights would be greatly appreciated.  Thanks!

 

SVC 6.4.04

V7000 6.4.04 Storage

Blade Center H (8552),

QLogic 8Gb Intelligent Pass-thru module for IBM Blade Center (44x1916)  FW:  7.10.1.28.0

OS:  ESX 5.0 and Some W2K 8

HBA: 8 Gb QLogic CIOv QMI2582  (44X1945, replacement part number (CRU) 44X1948)  FW: 5.06.05 DRIVER: 934.5.4.0-1vmw

Updated on 2013-10-11T18:05:41Z at 2013-10-11T18:05:41Z by T_IBM2002
  • gez
    gez
    275 Posts

    Re: Qlogic 8GB Pass-Through Module Load Balancing

    ‏2013-09-30T19:12:23Z  

    It seems that you have the Passthru's set up correctly for load balancing, there really isn't much config to these things since they are passthrus.  Have you also checked to make sure the 9506's are set up for load balancing (ie port channel) on the ports that the passthrus are connected to?

  • T_IBM2002
    T_IBM2002
    3 Posts

    Re: Qlogic 8GB Pass-Through Module Load Balancing

    ‏2013-10-02T16:37:06Z  
    • gez
    • ‏2013-09-30T19:12:23Z

    It seems that you have the Passthru's set up correctly for load balancing, there really isn't much config to these things since they are passthrus.  Have you also checked to make sure the 9506's are set up for load balancing (ie port channel) on the ports that the passthrus are connected to?

    Hi Gez,

    Thanks for the suggestion.  The documentation for the pass-thru module does not mention port-channels as a requirement, only NPIV.  In fact the redbook states that if multiple external ports are mapped to an internal TH, the pass-thru will handle the load distribution via a built in algorithm.  I would like to test your theory but unfortunately all I have are production systems to work with.