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Cisco Bug: CSCur04298 - PVLAN-vPC+: VLANs forwarding on vpc secondary with incomplete configs

Last Modified

Jan 31, 2017

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

6.2(10)S81

Description (partial)

Symptom:
In VPC+ setup, VPC secondary leg in trunk secondary mode, has private-vlans forwarding which are not configured on the leg

Conditions:
In VPC + setup when the following steps are done

1. n7k-1-f2 and n7k-2-f2 are vpc peers. pvlan {10;30,40,50} in FP mode. 8 is a regular vlan in FP mode.
2. There are two vpcs - p3 is vpc 3 and p4 is vpc 4. Both vpcs are normal trunk ports
3. n7k-1-f2 is in 6.2.10 S81 and n7k-2-f2 is in 6.1.5.
4. did a copy r s of n7k-2-f2 and reloaded with 6.2.10.S81. Now both have 6.2.10 S81
5. After reload, changed vpc 3 to private-vlan trunk secondary mode and brought up {10,50} on both peers. 
6. Now changed mode to trunk promiscuous on vpc secondary. Mapping are not configured yet.
7. Changed mode on vpc primary to Trunk promiscuous and brought up mapping along with allowed vlan 8.
8. Now check vpc secondary po3. Vlan 10 and 8 are forwarding although there was no such config on the port.
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