- # Get next-hop address
- nh_addr = None
- for net in nodes_addr.values():
- for port in net['ports'].values():
- if port['if'] == interface and port['node'] == node['host']:
- for nh in net['ports'].values():
- if nh['if'] != interface and nh['node'] != node['host']:
- nh_addr = nh['addr']
- if nh_addr is None:
- raise Exception('next-hop not found')
-
- cmd_input = 'ip_add_del_route {0} via {1} {2} resolve-attempts 10'. \
- format(dst_net, nh_addr, interface)
- (ret_code, _, _) = ssh.exec_command_sudo(Constants.VAT_BIN_NAME,
- cmd_input)
- if int(ret_code) != 0:
- raise Exception("'{0}' failed on {1}".format(cmd_input,
- node['host']))
+ @staticmethod
+ def get_link_prefix(link, nodes_addr):
+ """Get link IPv6 address prefix.
+
+ :param link: Link name.
+ :param nodes_addr: Available nodes IPv6 adresses.
+ :type link: str
+ :type nodes_addr: dict
+ :return: Link IPv6 address prefix.
+ :rtype: int
+ """
+ net = nodes_addr.get(link)
+ if net is None:
+ raise ValueError('Link "{0}" address not found'.format(link))
+ return net.get('prefix')