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Cisco Bug: CSCuq05308 - Write erase/reload a non-def vdc is not removing previous bkout mapping

Last Modified

Apr 27, 2017

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

6.2(10)S31

Description (partial)

Symptom:
Upon Switch reload or non-default vdc reload, the following symptoms are seen.

Non-default VDC's breakout config & breakout ports are out of sync.

 Symptom 1:

          In non-default vdc, Breakout ports are available instead of the Front Panel port.
         'show running config' & 'show interface breakout' commands will not show that the front panel interface is  broken in the non-default vdc.
          But 'show vdc membership' & 'show interface brief' commands will show that the front panel port is  broken and the breakout ports are available for use in the vdc.

Show running ----> show that the "show run | grep breakout" output is empty.

'Show interface ethernet 3/8 breakout' output is empty.

'Show vdc membership' output.
Flags : b - breakout port
---------------------------------
vdc_id: 2 vdc_name: eth interfaces:
Ethernet3/8(b)  Ethernet3/8/1         Ethernet3/8/2         Ethernet3/8/3   Ethernet3/8/4
 
'Show interface brief ' output.

--------------------------------------------------------------------------------
Ethernet      VLAN    Type Mode   Status  Reason                   Speed     Por
t
Interface                                                                    Ch
#
--------------------------------------------------------------------------------
Eth3/7        --      eth  routed down    Administratively down      auto(D) --
Eth3/8/1      --      eth  routed down    SFP not inserted           auto(D) --
Eth3/8/2      --      eth  routed down    SFP not inserted           auto(D) --
Eth3/8/3      --      eth  routed down    SFP not inserted           auto(D) --
Eth3/8/4      --      eth  routed down    SFP not inserted           auto

 Symptom 2:

         In non-default vdc, Front panel port is available instead of the Breakout ports
         'show running config' & 'show interface breakout' commands will show that  the front panel port is broken out.
        But 'show vdc membership' & 'show interface brief' commands will show that the front panel port is not broken out and the breakout ports are not available for use in the vdc.
 
Example:

Show running ---->   shows that the port is broken out in running config

'Show run | grep breakout' output
interface breakout module 3 port 8 map 10g-4x

'Show interface e3/8 breakout'  output
 --------------------------------------------------------------------------------
Parent                     Breakout Map    Breakout Ports
--------------------------------------------------------------------------------
Eth3/8                     10g-4x          Eth3/8/1-4
 
?Show vdc membership? output.
Flags : b - breakout port
---------------------------------
 vdc_id: 2 vdc_name: eth interfaces:
        Ethernet3/7  Ethernet3/8
 ?Show interface brief? output
--------------------------------------------------------------------------------
Ethernet      VLAN    Type Mode   Status  Reason                   Speed     Por
t
Interface                                                                    Ch
#
--------------------------------------------------------------------------------
Eth3/7        --      eth  routed down    Administratively down      auto(D) --
Eth3/8        --      eth  routed down    XCVR not inserted          auto(D) --

Conditions:
Issue is seen only when breakout or no breakout is done in non-default VDC. Here are the scenario's.
 
Scenario 1:
                Interface breakout done in non-default vdc.
               ' copy r s ' NOT being done on the non-default vdc  Or write erase done in the non-default vdc
               ' copy r s '  being done on the default vdc
               Reload the switch
 
Scenario 2:
               Interface breakout done in non-default vdc.
               ' copy r s ' being done on the non-default vdc
               ' copy r s ' NOT being done on the default vdc
               Reload the switch
               This scenario is not applicable to 6.2.10 but applicable to earlier releases. In 6.2.10, before copy r s can be done in the non-default vdc, copy r s has to be done in the default vdc.

Scenario 3:
             Interface breakout done in non-default vdc
             ' copy r s ' being done on the non-default vdc
            ' copy r s '  being done on the default vdc
             Do 'no interface breakout' on the same interface which was broken in the step1.
             Reload the non-default vdc.
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