docs: def create_router(self, context, router):
          """Create a new router entry in DB, and create it Arista HW."""
  
          # Add router to the DB
          new_router = super(AristaL3ServicePlugin, self).create_router(
              context,
              router)
          # create router on the Arista Hw
          try:
              self.driver.create_router(context, new_router)
              return new_router
          except Exception:
              with excutils.save_and_reraise_exception():
                  LOG.error(_LE("Error creating router on Arista HW router=%s "),
                            new_router)
                  super(AristaL3ServicePlugin, self).delete_router(
                      context,
                      new_router['id']
                  )