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Cisco Bug: CSCuw42936 - Cosmetic: N9K VLAN range missing from no spanning-tree running-config

Last Modified

Feb 20, 2018

Products (12)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 93120TX Switch
  • Cisco Nexus 9504 Switch
  • Cisco Nexus 3164Q Switch
  • Cisco Nexus 9332PQ Switch
  • Cisco Nexus 9508 Switch
  • Cisco Nexus 93128TX Switch
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Known Affected Releases

6.1(2)I2(2b) 6.1(2)I3(4b) 6.1(2)I3(5) 7.0(3)I1(3) 7.0(3)I1(3a)

Description (partial)

When disabling spanning-tree for a long range of VLANs, which causes NXOS to split the running-configuration output into several rows, VLANs that are part of a sub-range may go missing from the outputs.  Functionally, spanning-tree is correctly shown disabled.


switch(config-vlan)# sh run vlan

!Command: show running-config vlan
!Time: Mon Sep 28 03:50:33 2015

version 6.1(2)I3(4b)
vlan 1,1152,1154,1156,1158,1160,1162,1164,1166,1168,1170,1172,1174,1176,1178,118
6,3830,3832,3834,3836,3845-3846   <<<<   3846 is defined and listed
vlan 3856

switch(config-vlan)# no spanning-tree vlan 1152,1154,1156,1158,1160,1162,1164,1166,1168,1170,1172,1174,1176,1178,1180,1182,1184,1186,1206-1207,1244-1245,1248,1269,1807,1914,3168,3170,3172,3187-3188,3200,3210,3238,3240,3248,3250,3656,3658,3660,3662,3664,3666,3668,3670,3672,3674,3676,3678,3680,3682,3684,3686,3688,3690,3694,3808,3810,3815-3816,3823,3825-3826,3830,3832,3834,3836,3845-3846,3856
switch(config)# no span vlan 1

switch(config)# sh run span
no spanning-tree vlan 1,1152,1154,1156,1158,1160,1162,1164,1166,1168,1170,1172,1174,1176,1178,1180,1182,1184,1186,1206-1207,1244-1245,1248,1269,1807,1914,3168,3170,3172,3187-3188,3200,3210,3238,3240,3248,3250,3656,3658,3660,3662,3664,3666,3668,3670,3672,3674,3676,3678,3680,3682,3684,3686,3688,3690,3694,3808,3810,3815-3816,3823,3825-3826,3830,3832,3834,3836,3845  <<<<   3846 is missing
no spanning-tree vlan 3856     <<<<   3846 is missing

Expanding the range of VLANS for which Spanning-tree is disabled, causing NXOS to split the output into multiple rows. If a sub-range of VLANs falls on the boundary for the split, end of sub-range goes missing.
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