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Cisco Bug: CSCvs11098 - Rollback fails to update OTV extend-vlan list on Nexus 7000 switch platforms

Last Modified

May 07, 2020

Products (9)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 2-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases

7.3(2)D1(1)

Description (partial)

Symptom:
OTV extend-vlan list is removed and fails to re-apply during rollback when VLAN list is changed.

For example, VLAN 30 is removed from OTV extended-vlan list in the running config and rollback feature is used to restore the previous configuration:

interface Overlay0
  otv join-interface x
  otv control-group x.x.x.x
  otv data-group x.x.x.x
  otv extend-vlan 10, 20, 30          <<<
  no shutdown

N7K# checkpoint otv
<snip>
N7K(config-if-overlay)# otv extend-vlan remove 30
N7K(config-if-overlay)# end
<snip>
N7K# rollback running-config checkpoint otv

The patch generated to rollback the configuration will look as follows:

interface Overlay0
  no otv extend-vlan    <<<
  exit
!
interface Overlay0
otv extend-vlan 10, 20, 30

The above command sequence will fail due to the interface delete holddown and prevent it from updating the list correctly:

Vlan 10 in delete holddown for overlay Overlay0
. No vlan in the present command will be extended

Fri Nov 15 10:39:58 2019:type=update:id=rollback:user=cisco:cmd=configure terminal ; interface Overlay0 ; otv extend-vlan 10, 20, 30 (FAILURE)

The rollback feature then tries to revert the changes by applying the original VLAN list which also fails and no VLANs are extended over OTV as a result:
 
Fri Nov 15 10:40:01 2019:type=update:id=rollback:user=cisco:cmd=configure terminal ; interface Overlay0 ; otv extend-vlan 10, 20 (FAILURE)

Conditions:
Change in the OTV extend-vlan list during rollback.
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Bug Details Include

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