Preview Tool

Cisco Bug: CSCul45644 - vlan_mgr crashed if dynamic reserved vlan range conflicts with vtp vlan.

Last Modified

Feb 13, 2018

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases


Description (partial)

When reserved vlan range is within the VTP vlan range (vlan 2-1001) and
this vtp switch receives a vtp message from the network carrying a user vlan that has been locally configured as reserved, the new vlan creation message to vlan_mgr causes a crash.

This bug is hit with VTP enabled and reserved vlan range falls under VTP vlan range.

1.      vdc1 and vdc2 have two trunks links between them. 
2.      vdc1 is vtp mode server, vdc2 is vtp client or server mode.
3.      vdc2 has a reserved vlan range 100-227 configured.
          ex: switch(config)>system vlan 100 reserve.
4.      vdc1 creates vlan 100.
5.      when vdc2 receives vtp add vlan message, vlan_mgr crashes.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.