Added switch_paths table, which will be filled by assign_wrapper with information about which inter-switch links VLANs use, so that snmpit does not have to re-calculate these paths.
Added switch_paths table, which will be filled by assign_wrapper with
information about which inter-switch links VLANs use, so that snmpit
does not have to re-calculate these paths.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome