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Cisco Bug: CSCul80812 - Port inheritance disappears from int config if large number of VLAN used

Last Modified

Feb 08, 2017

Products (7)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5020 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch
  • Cisco Nexus 5010 Switch

Known Affected Releases

5.2(1)N1(6)

Description (partial)

Symptom:
With large number of allowed VLANs applied through "inherit port-profile" command we can see that instead:

interface Ethernet101/1/48
  inherit port-profile TEST

We would see normal configuration commands:

interface Ethernet101/1/48
  switchport trunk allowed vlan 48,60,68,80-88,92,101-120,461-463,466-472,611-61
4,623-626,850-852,861,867-868,923-925,949-954,2100,2102-2115,2121-2124,2132-2140
,2162-2170,2201,2203,2211-2213,2224,2230,2232,2251-2253,2401,2421,2423,2434

For example config would be working fine: 

 switchport trunk allowed vlan 48,60,68,80-88,92,101-120,461-463,466-472,611-61
4,623-626,850-852,861,867-868,923-925,949-954,2100,2102-2115,2121-2124,2132-2140
,2162-2170,2201,2203,2211-2213,2224,2230,2232,2251-2253,2401,2421

But adding to allowed VLAN list 2423,2434 will trigger issue.

Conditions:
Apply port-profile to interface with long allowed VLAN list

Example:

  switchport trunk allowed vlan 48,60,68,80-88,92,101-120,461-463,466-472,611-61
4,623-626,850-852,861,867-868,923-925,949-954,2100,2102-2115,2121-2124,2132-2140
,2162-2170,2201,2203,2211-2213,2224,2230,2232,2251-2253,2401,2421,2423,2434

Enough to trigger issue
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