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Dell SmartFabric OS10 User Guide Release 10.5.4

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re-balance fc npg sessions vfabric

Rebalances both FCoE and FC sessions across FC uplinks.

Syntax
re-balance fc npg sessions vfabric vfabric-id [dry-run][brief]
Parameters
None
Defaults
Not configured
Command Mode
EXEC
Usage Information
Triggers the load-balancing mechanism to redistribute the sessions across the FC uplinks. The dry-run option displays the current state of the system, sessions that would be cleared, and the system state after the load balancing is done without actually doing it. You can use the brief option (both in dry run and actual run) to view only the session redistribution information. You can use the fcoe delay fcf-adv configuration command to load balance the system during a switch reload. If the system is unbalanced after the reload and after configuring the fcoe delay fcf-adv command, then use the rebalance command to balance the sessions. This command is supported in the NPG mode.
NOTE: Dell Technologies recommends that you do not use this command in an NPG cascading topology.

The fields and their corresponding descriptions that are displayed in this command are as follows:

  • Uplink Intf—The name of the FC uplink interface.
  • FLOGI—Number of Fabric Login Sessions in the FC uplink interface.
  • FDISC—Number of Fabric Discovery Sessions in the FC uplink interface.
  • Load—Total number of sessions (FLOGI and FDISC) in the FC uplink interface.
  • Speed—Link speed of the FC uplink interface.
  • Excess Load—Excess load is the absolute (Current load on the link - ((Minimum load per 8G speed in current state) * port-speed/8G)). It captures the level to which the corresponding link is oversubscribed when compared to other FC upstream links in the system.
  • Node WWPN—World-Wide Port Name, which is used for the Fabric Login request of the Server that is connected to the OS10 switch. It can be an FCoE server or an FC server.
  • From Uplink Intf—Interface name of the FC uplink from which the sessions from the server are redistributed.
  • To Uplink Intf—Interface name of the FC uplink to which the sessions are mapped when the server logs back in.
  • No. of sessions—Count of redistributed sessions.
Example 
OS10#re-balance npg sessions vfabric 100 dry-run

Fabric Id 100 Current State 
Uplink      FLOGI   FDISC   Load   Speed        Excess    
Intf                               (Gbps)       Load
----------------------------------------------------------------
Fc 1/1/1    1       9       10     8             7             
Fc 1/1/2    3       3       6      16            0            
----------------------------------------------------------------      
            4       12      16     24            7            
----------------------------------------------------------------
Session Re-distributions:

16 Session Re-distribution(s)
-------------------------------------------------------------------------
Node WWPN              From Uplink Intf  To Uplink Intf  No.of sessions
-------------------------------------------------------------------------
20:01:d4:ae:52:1a:ee:54  Fc 1/1/1          Fc 1/1/2         10
21:01:d4:ae:52:1a:ee:54  Fc 1/1/2          Fc 1/1/1          2
22:01:d4:ae:52:1a:ee:54  Fc 1/1/2          Fc 1/1/1          2
23:01:d4:ae:52:1a:ee:54  Fc 1/1/2          Fc 1/1/1          2

Fabric Id 100 State after Re-balancing
Uplink      FLOGI   FDISC     Load   Speed       Excess   
Intf                                 (Gbps)       Load
-------------------------------------------------------------------
Fc 1/1/1    3       3         6      8             1
Fc 1/1/2    1       9         10     16            0
-------------------------------------------------------------------
            4       12        16     24            1 
-------------------------------------------------------------------
OS10#re-balance npg sessions vfabric 100 dry-run brief

Fabric Id 100 Session Re-distributions:

16 Session Re-distribution(s)
-----------------------------------------------------------------------
Node WWPN              From Uplink Intf  To Uplink Intf  No.of sessions
-----------------------------------------------------------------------
20:01:d4:ae:52:1a:ee:54     Fc 1/1/1       Fc 1/1/2         10
21:01:d4:ae:52:1a:ee:54     Fc 1/1/2       Fc 1/1/1          2
22:01:d4:ae:52:1a:ee:54     Fc 1/1/2       Fc 1/1/1          2
23:01:d4:ae:52:1a:ee:54     Fc 1/1/2       Fc 1/1/1          2
OS10#re-balance npg sessions vfabric 100 

Fabric Id 100 State before Re-balancing
Uplink      FLOGI   FDISC    Load    Speed    Excess     
Intf                                 (Gbps)    Load
----------------------------------------------------------------- 
Fc 1/1/1    1       9        10      8          7              
Fc 1/1/2    3       3        6       16         0             
----------------------------------------------------------------- 
            4       12       16      24         7            
-----------------------------------------------------------------

Session Re-distributions:

16 Session Re-distribution(s)
-------------------------------------------------------------------------
Node WWPN              From Uplink Intf   To Uplink Intf  No.of sessions
-------------------------------------------------------------------------
20:01:d4:ae:52:1a:ee:54   Fc 1/1/1         Fc 1/1/2           10
21:01:d4:ae:52:1a:ee:54   Fc 1/1/2         Fc 1/1/1            2
22:01:d4:ae:52:1a:ee:54   Fc 1/1/2         Fc 1/1/1            2
23:01:d4:ae:52:1a:ee:54   Fc 1/1/2         Fc 1/1/1            2

Fabric Id 100 State after Re-balancing
Uplink      FLOGI    FDISC     Load     Speed      Excess   
Intf                                    (Gbps)      Load
---------------------------------------------------------------------
Fc 1/1/1    3        3         6        8            1                
Fc 1/1/2    1        9         10       16           0               
---------------------------------------------------------------------
            4        12        16       24           1               
---------------------------------------------------------------------
Supported Releases
10.5.2.0 or later

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