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Cisco Bug: CSCsz50131 - Exceeding the VLAN limitation is not logged properly in accounting log

Last Modified

Mar 27, 2015

Products (1)

  • Cisco Nexus 5000 Series Switches

Known Affected Releases


Description (partial)


Nexus 5000 4.1(3)N1(1) image supports a maximum of 512 VLANs per switch. If user tries to create more than 512 VLANs via CLI, then it throws proper error in the command line. But, when the same configuration is performed via XML ( DCNM uses XML to interact with the switch ), no error message is thrown, and it leaves the DCNM and switch in out-of-sync.


From DCNM try to create more than 512 VLAN at a time ( similar to range option in CLI ) via DCNM GUI. DCNM will generate appropriate XML request and send it to the device. Since Nexus 5000 switch has a limit of 512 VLANs, it will only create 512 VLANs in the switch and for the remaining VLANs switch will not create those VLANs, but it won't throw any error message as well for the XML request. Instead it will send a OK XML response. On receiving the OK XML response, DCNM will assume that all the VLANs are created in the switch, and it will update its database accordingly  and start showing all those VLANs in GUI. This leaves DCNM and switch in out-of-sync.
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