+ @staticmethod
+ def delete_linux_interface_ip(
+ node, interface, ip_addr, prefix_length, namespace=None):
+ """Delete IP address from interface in linux.
+
+ :param node: VPP/TG node.
+ :param interface: Interface in namespace.
+ :param ip_addr: IP to be deleted from interface.
+ :param prefix_length: IP prefix length.
+ :param namespace: Execute command in namespace. Optional
+ :type node: dict
+ :type interface: str
+ :type ip_addr: str
+ :type prefix_length: int
+ :type namespace: str
+ :raises RuntimeError: IP could not be deleted.
+ """
+ # TODO: Refactor command execution in namespaces into central
+ # methods (e.g. Namespace.exec_cmd_in_namespace)
+ if namespace is not None:
+ cmd = f"ip netns exec {namespace} ip addr del " \
+ f"{ip_addr}/{prefix_length} dev {interface}"
+ else:
+ cmd = f"ip addr del {ip_addr}/{prefix_length} dev {interface}"
+
+ exec_cmd_no_error(node, cmd, timeout=5, sudo=True)
+
+ @staticmethod
+ def linux_interface_has_ip(
+ node, interface, ip_addr, prefix_length, namespace=None):
+ """Return True if interface in linux has IP address.
+
+ :param node: VPP/TG node.
+ :param interface: Interface in namespace.
+ :param ip_addr: IP to be queried on interface.
+ :param prefix_length: IP prefix length.
+ :param namespace: Execute command in namespace. Optional
+ :type node: dict
+ :type interface: str
+ :type ip_addr: str
+ :type prefix_length: int
+ :type namespace: str
+ :rtype boolean
+ :raises RuntimeError: Request fails.
+ """
+ ip_addr_with_prefix = f"{ip_addr}/{prefix_length}"
+ if namespace is not None:
+ cmd = f"ip netns exec {namespace} ip addr show dev {interface}"
+ else:
+ cmd = f"ip addr show dev {interface}"
+
+ cmd += u" | grep 'inet ' | awk -e '{print $2}'"
+ cmd += f" | grep '{ip_addr_with_prefix}'"
+ _, stdout, _ = exec_cmd(node, cmd, timeout=5, sudo=True)
+
+ has_ip = stdout.rstrip()
+ return bool(has_ip == ip_addr_with_prefix)
+