+ # get the ip address of the first node in the link
+ ifname1 = Xrn(link['interface1']).get_leaf()
+ (node, device) = ifname1.split(':')
+ node_id = int(node.replace('node', ''))
+ node = aggregate.nodes[node_id]
+ if1 = aggregate.interfaces[node['interface_ids'][0]]
+ ipaddr = if1['ip']
+ topo_rspec = VLink.get_topo_rspec(link, ipaddr)
+ self.api.plshell.AddSliceTag(self.api.plauth, slice['name'], 'topo_rspec', topo_rspec, node_id)
+