[c-nsp] Spanning Tree works great - except when it doesn't

[Patrick M. Hausen]

Hi, Nick,

> Am 15.10.2015 um 13:43 schrieb Nick Cutting <ncutting at edgetg.co.uk>:
> I came across a curly one like this a few months back - turned out the STP handling of native VLan frames VS a non-created but configured native vlan on the downstream switch port.
> The downstream switchport was also configured for native vlan of 999 - BUT vlan999 was not created in the vlan database so defaulted to expecting STP frames untagged I think - it was something like that.

You nailed it! for some reason that I now need to investigate
I do not have VLAN 999 in my VLAN database.

*argh*

Thanks, everyone.
Patrick
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