1 # Copyright (c) 2016 Cisco and/or its affiliates.
2 # Licensed under the Apache License, Version 2.0 (the "License");
3 # you may not use this file except in compliance with the License.
4 # You may obtain a copy of the License at:
6 # http://www.apache.org/licenses/LICENSE-2.0
8 # Unless required by applicable law or agreed to in writing, software
9 # distributed under the License is distributed on an "AS IS" BASIS,
10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 # See the License for the specific language governing permissions and
12 # limitations under the License.
14 """Interface util library"""
16 from time import time, sleep
18 from robot.api import logger
20 from resources.libraries.python.ssh import SSH
21 from resources.libraries.python.IPUtil import convert_ipv4_netmask_prefix
22 from resources.libraries.python.ssh import exec_cmd_no_error
23 from resources.libraries.python.topology import NodeType, Topology
24 from resources.libraries.python.VatExecutor import VatExecutor, VatTerminal
25 from resources.libraries.python.VatJsonUtil import VatJsonUtil
26 from resources.libraries.python.parsers.JsonParser import JsonParser
29 class InterfaceUtil(object):
30 """General utilities for managing interfaces"""
32 __UDEV_IF_RULES_FILE = '/etc/udev/rules.d/10-network.rules'
35 def set_interface_state(node, interface, state, if_type="key"):
36 """Set interface state on a node.
38 Function can be used for DUTs as well as for TGs.
40 :param node: Node where the interface is.
41 :param interface: Interface key or sw_if_index or name.
42 :param state: One of 'up' or 'down'.
43 :param if_type: Interface type
45 :type interface: str or int
52 if isinstance(interface, basestring):
53 sw_if_index = Topology.get_interface_sw_index(node, interface)
54 iface_name = Topology.get_interface_name(node, interface)
56 sw_if_index = interface
57 elif if_type == "name":
58 iface_key = Topology.get_interface_by_name(node, interface)
59 if iface_key is not None:
60 sw_if_index = Topology.get_interface_sw_index(node, iface_key)
61 iface_name = interface
63 raise ValueError("if_type unknown: {}".format(if_type))
65 if node['type'] == NodeType.DUT:
71 raise ValueError('Unexpected interface state: {}'.format(state))
72 VatExecutor.cmd_from_template(node, 'set_if_state.vat',
73 sw_if_index=sw_if_index, state=state)
74 elif node['type'] == NodeType.TG or node['type'] == NodeType.VM:
75 cmd = 'ip link set {} {}'.format(iface_name, state)
76 exec_cmd_no_error(node, cmd, sudo=True)
78 raise Exception('Node {} has unknown NodeType: "{}"'.
79 format(node['host'], node['type']))
82 def set_interface_ethernet_mtu(node, iface_key, mtu):
83 """Set Ethernet MTU for specified interface.
85 Function can be used only for TGs.
87 :param node: Node where the interface is.
88 :param interface: Interface key from topology file.
89 :param mtu: MTU to set.
95 if node['type'] == NodeType.DUT:
96 ValueError('Node {}: Setting Ethernet MTU for interface '
97 'on DUT nodes not supported', node['host'])
98 elif node['type'] == NodeType.TG:
99 iface_name = Topology.get_interface_name(node, iface_key)
100 cmd = 'ip link set {} mtu {}'.format(iface_name, mtu)
101 exec_cmd_no_error(node, cmd, sudo=True)
103 raise ValueError('Node {} has unknown NodeType: "{}"'.
104 format(node['host'], node['type']))
107 def set_default_ethernet_mtu_on_all_interfaces_on_node(node):
108 """Set default Ethernet MTU on all interfaces on node.
110 Function can be used only for TGs.
112 :param node: Node where to set default MTU.
116 for ifc in node['interfaces']:
117 InterfaceUtil.set_interface_ethernet_mtu(node, ifc, 1500)
120 def vpp_node_interfaces_ready_wait(node, timeout=10):
121 """Wait until all interfaces with admin-up are in link-up state.
123 :param node: Node to wait on.
124 :param timeout: Waiting timeout in seconds (optional, default 10s).
127 :raises: RuntimeError if the timeout period value has elapsed.
133 out = InterfaceUtil.vpp_get_interface_data(node)
134 if time() - start > timeout:
135 for interface in out:
136 if interface.get('admin_up_down') == 1:
137 if interface.get('link_up_down') != 1:
138 logger.debug('{0} link-down'.format(
139 interface.get('interface_name')))
140 raise RuntimeError('timeout, not up {0}'.format(not_ready))
142 for interface in out:
143 if interface.get('admin_up_down') == 1:
144 if interface.get('link_up_down') != 1:
145 not_ready.append(interface.get('interface_name'))
149 logger.debug('Interfaces still in link-down state: {0}, '
150 'waiting...'.format(not_ready))
154 def vpp_nodes_interfaces_ready_wait(nodes, timeout=10):
155 """Wait until all interfaces with admin-up are in link-up state for
158 :param nodes: List of nodes to wait on.
159 :param timeout: Seconds to wait per node for all interfaces to come up.
162 :raises: RuntimeError if the timeout period value has elapsed.
165 InterfaceUtil.vpp_node_interfaces_ready_wait(node, timeout)
168 def all_vpp_interfaces_ready_wait(nodes, timeout=10):
169 """Wait until all interfaces with admin-up are in link-up state for all
170 nodes in the topology.
172 :param nodes: Nodes in the topology.
173 :param timeout: Seconds to wait per node for all interfaces to come up.
176 :raises: RuntimeError if the timeout period value has elapsed.
178 for node in nodes.values():
179 if node['type'] == NodeType.DUT:
180 InterfaceUtil.vpp_node_interfaces_ready_wait(node, timeout)
183 def vpp_get_interface_data(node, interface=None):
184 """Get all interface data from a VPP node. If a name or
185 sw_interface_index is provided, return only data for the matching
188 :param node: VPP node to get interface data from.
189 :param interface: Numeric index or name string of a specific interface.
191 :type interface: int or str
192 :return: List of dictionaries containing data for each interface, or a
193 single dictionary for the specified interface.
196 with VatTerminal(node) as vat:
197 response = vat.vat_terminal_exec_cmd_from_template(
198 "interface_dump.vat")
202 if interface is not None:
203 if isinstance(interface, basestring):
204 param = "interface_name"
205 elif isinstance(interface, int):
206 param = "sw_if_index"
210 if data_if[param] == interface:
216 def vpp_get_interface_ip_addresses(node, interface, ip_version):
217 """Get list of IP addresses from an interface on a VPP node.
219 :param node: VPP node to get data from.
220 :param interface: Name of an interface on the VPP node.
221 :param ip_version: IP protocol version (ipv4 or ipv6).
224 :type ip_version: str
225 :return: List of dictionaries, each containing IP address, subnet
226 prefix length and also the subnet mask for ipv4 addresses.
227 Note: A single interface may have multiple IP addresses assigned.
230 sw_if_index = InterfaceUtil.get_sw_if_index(node, interface)
232 with VatTerminal(node) as vat:
233 response = vat.vat_terminal_exec_cmd_from_template(
234 "ip_address_dump.vat", ip_version=ip_version,
235 sw_if_index=sw_if_index)
239 if ip_version == "ipv4":
241 item["netmask"] = convert_ipv4_netmask_prefix(
242 item["prefix_length"])
246 def tg_set_interface_driver(node, pci_addr, driver):
247 """Set interface driver on the TG node.
249 :param node: Node to set interface driver on (must be TG node).
250 :param pci_addr: PCI address of the interface.
251 :param driver: Driver name.
256 old_driver = InterfaceUtil.tg_get_interface_driver(node, pci_addr)
257 if old_driver == driver:
263 # Unbind from current driver
264 if old_driver is not None:
265 cmd = 'sh -c "echo {0} > /sys/bus/pci/drivers/{1}/unbind"'.format(
266 pci_addr, old_driver)
267 (ret_code, _, _) = ssh.exec_command_sudo(cmd)
268 if int(ret_code) != 0:
269 raise Exception("'{0}' failed on '{1}'".format(cmd,
272 # Bind to the new driver
273 cmd = 'sh -c "echo {0} > /sys/bus/pci/drivers/{1}/bind"'.format(
275 (ret_code, _, _) = ssh.exec_command_sudo(cmd)
276 if int(ret_code) != 0:
277 raise Exception("'{0}' failed on '{1}'".format(cmd, node['host']))
280 def tg_get_interface_driver(node, pci_addr):
281 """Get interface driver from the TG node.
283 :param node: Node to get interface driver on (must be TG node).
284 :param pci_addr: PCI address of the interface.
287 :return: Interface driver or None if not found.
291 # lspci -vmmks 0000:00:05.0
293 Class: Ethernet controller
295 Device: Virtio network device
296 SVendor: Red Hat, Inc
304 cmd = 'lspci -vmmks {0}'.format(pci_addr)
306 (ret_code, stdout, _) = ssh.exec_command(cmd)
307 if int(ret_code) != 0:
308 raise Exception("'{0}' failed on '{1}'".format(cmd, node['host']))
310 for line in stdout.splitlines():
313 (name, value) = line.split("\t", 1)
314 if name == 'Driver:':
320 def tg_set_interfaces_udev_rules(node):
321 """Set udev rules for interfaces.
323 Create udev rules file in /etc/udev/rules.d where are rules for each
324 interface used by TG node, based on MAC interface has specific name.
325 So after unbind and bind again to kernel driver interface has same
326 name as before. This must be called after TG has set name for each
327 port in topology dictionary.
329 SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="52:54:00:e1:8a:0f",
332 :param node: Node to set udev rules on (must be TG node).
338 cmd = 'rm -f {0}'.format(InterfaceUtil.__UDEV_IF_RULES_FILE)
339 (ret_code, _, _) = ssh.exec_command_sudo(cmd)
340 if int(ret_code) != 0:
341 raise Exception("'{0}' failed on '{1}'".format(cmd, node['host']))
343 for interface in node['interfaces'].values():
344 rule = 'SUBSYSTEM==\\"net\\", ACTION==\\"add\\", ATTR{address}' + \
345 '==\\"' + interface['mac_address'] + '\\", NAME=\\"' + \
346 interface['name'] + '\\"'
347 cmd = 'sh -c "echo \'{0}\' >> {1}"'.format(
348 rule, InterfaceUtil.__UDEV_IF_RULES_FILE)
349 (ret_code, _, _) = ssh.exec_command_sudo(cmd)
350 if int(ret_code) != 0:
351 raise Exception("'{0}' failed on '{1}'".format(cmd,
354 cmd = '/etc/init.d/udev restart'
355 ssh.exec_command_sudo(cmd)
358 def tg_set_interfaces_default_driver(node):
359 """Set interfaces default driver specified in topology yaml file.
361 :param node: Node to setup interfaces driver on (must be TG node).
364 for interface in node['interfaces'].values():
365 InterfaceUtil.tg_set_interface_driver(node,
366 interface['pci_address'],
370 def update_vpp_interface_data_on_node(node):
371 """Update vpp generated interface data for a given node in DICT__nodes.
373 Updates interface names, software if index numbers and any other details
374 generated specifically by vpp that are unknown before testcase run.
375 It does this by dumping interface list to JSON output from all
376 devices using vpp_api_test, and pairing known information from topology
377 (mac address/pci address of interface) to state from VPP.
379 :param node: Node selected from DICT__nodes.
382 vat_executor = VatExecutor()
383 vat_executor.execute_script_json_out("dump_interfaces.vat", node)
384 interface_dump_json = vat_executor.get_script_stdout()
385 VatJsonUtil.update_vpp_interface_data_from_json(node,
389 def update_tg_interface_data_on_node(node):
390 """Update interface name for TG/linux node in DICT__nodes.
392 :param node: Node selected from DICT__nodes.
396 # for dev in `ls /sys/class/net/`;
397 > do echo "\"`cat /sys/class/net/$dev/address`\": \"$dev\""; done
398 "52:54:00:9f:82:63": "eth0"
399 "52:54:00:77:ae:a9": "eth1"
400 "52:54:00:e1:8a:0f": "eth2"
401 "00:00:00:00:00:00": "lo"
403 .. todo:: parse lshw -json instead
405 # First setup interface driver specified in yaml file
406 InterfaceUtil.tg_set_interfaces_default_driver(node)
408 # Get interface names
412 cmd = ('for dev in `ls /sys/class/net/`; do echo "\\"`cat '
413 '/sys/class/net/$dev/address`\\": \\"$dev\\""; done;')
415 (ret_code, stdout, _) = ssh.exec_command(cmd)
416 if int(ret_code) != 0:
417 raise Exception('Get interface name and MAC failed')
418 tmp = "{" + stdout.rstrip().replace('\n', ',') + "}"
419 interfaces = JsonParser().parse_data(tmp)
420 for interface in node['interfaces'].values():
421 name = interfaces.get(interface['mac_address'])
424 interface['name'] = name
426 # Set udev rules for interfaces
427 InterfaceUtil.tg_set_interfaces_udev_rules(node)
430 def update_all_interface_data_on_all_nodes(nodes, skip_tg=False):
431 """Update interface names on all nodes in DICT__nodes.
433 This method updates the topology dictionary by querying interface lists
434 of all nodes mentioned in the topology dictionary.
436 :param nodes: Nodes in the topology.
437 :param skip_tg: Skip TG node
441 for node_data in nodes.values():
442 if node_data['type'] == NodeType.DUT:
443 InterfaceUtil.update_vpp_interface_data_on_node(node_data)
444 elif node_data['type'] == NodeType.TG and not skip_tg:
445 InterfaceUtil.update_tg_interface_data_on_node(node_data)
448 def create_vlan_subinterface(node, interface, vlan):
449 """Create VLAN subinterface on node.
451 :param node: Node to add VLAN subinterface on.
452 :param interface: Interface name on which create VLAN subinterface.
453 :param vlan: VLAN ID of the subinterface to be created.
457 :return: Name and index of created subinterface.
460 iface_key = Topology.get_interface_by_name(node, interface)
461 sw_if_index = Topology.get_interface_sw_index(node, iface_key)
463 output = VatExecutor.cmd_from_template(node, "create_vlan_subif.vat",
464 sw_if_index=sw_if_index,
466 if output[0]["retval"] == 0:
467 sw_subif_index = output[0]["sw_if_index"]
468 logger.trace('VLAN subinterface with sw_if_index {} and VLAN ID {} '
469 'created on node {}'.format(sw_subif_index,
472 raise RuntimeError('Unable to create VLAN subinterface on node {}'
473 .format(node['host']))
475 with VatTerminal(node, False) as vat:
476 vat.vat_terminal_exec_cmd('exec show interfaces')
478 return '{}.{}'.format(interface, vlan), sw_subif_index
481 def create_vxlan_interface(node, vni, source_ip, destination_ip):
482 """Create VXLAN interface and return sw if index of created interface.
484 Executes "vxlan_add_del_tunnel src {src} dst {dst} vni {vni}" VAT
487 :param node: Node where to create VXLAN interface.
488 :param vni: VXLAN Network Identifier.
489 :param source_ip: Source IP of a VXLAN Tunnel End Point.
490 :param destination_ip: Destination IP of a VXLAN Tunnel End Point.
494 :type destination_ip: str
495 :return: SW IF INDEX of created interface.
498 output = VatExecutor.cmd_from_template(node, "vxlan_create.vat",
504 if output["retval"] == 0:
505 return output["sw_if_index"]
507 raise RuntimeError('Unable to create VXLAN interface on node {0}'
511 def vxlan_dump(node, interface=None):
512 """Get VxLAN data for the given interface.
514 :param node: VPP node to get interface data from.
515 :param interface: Numeric index or name string of a specific interface.
516 If None, information about all VxLAN interfaces is returned.
518 :type interface: int or str
519 :return: Dictionary containing data for the given VxLAN interface or if
520 interface=None, the list of dictionaries with all VxLAN interfaces.
523 param = "sw_if_index"
524 if interface is None:
527 elif isinstance(interface, basestring):
528 sw_if_index = Topology.get_interface_sw_index(node, interface)
529 elif isinstance(interface, int):
530 sw_if_index = interface
532 raise Exception("Wrong interface format {0}".format(interface))
534 with VatTerminal(node) as vat:
535 response = vat.vat_terminal_exec_cmd_from_template(
536 "vxlan_dump.vat", param=param, sw_if_index=sw_if_index)
539 for vxlan in response[0]:
540 if vxlan["sw_if_index"] == sw_if_index:
546 def vhost_user_dump(node):
547 """Get vhost-user data for the given node.
549 :param node: VPP node to get interface data from.
551 :return: List of dictionaries with all vhost-user interfaces.
554 with VatTerminal(node) as vat:
555 response = vat.vat_terminal_exec_cmd_from_template(
556 "vhost_user_dump.vat")
561 def tap_dump(node, name=None):
562 """Get all TAP interface data from the given node, or data about
563 a specific TAP interface.
565 :param node: VPP node to get data from.
566 :param name: Optional name of a specific TAP interface.
569 :return: Dictionary of information about a specific TAP interface, or
570 a List of dictionaries containing all TAP data for the given node.
573 with VatTerminal(node) as vat:
574 response = vat.vat_terminal_exec_cmd_from_template(
579 for item in response[0]:
580 if name == item['dev_name']:
585 def create_subinterface(node, interface, sub_id, outer_vlan_id=None,
586 inner_vlan_id=None, type_subif=None):
587 """Create sub-interface on node. It is possible to set required
588 sub-interface type and VLAN tag(s).
590 :param node: Node to add sub-interface.
591 :param interface: Interface name on which create sub-interface.
592 :param sub_id: ID of the sub-interface to be created.
593 :param outer_vlan_id: Optional outer VLAN ID.
594 :param inner_vlan_id: Optional inner VLAN ID.
595 :param type_subif: Optional type of sub-interface. Values supported by
596 VPP: [no_tags] [one_tag] [two_tags] [dot1ad] [exact_match] [default_sub]
598 :type interface: str or int
600 :type outer_vlan_id: int
601 :type inner_vlan_id: int
602 :type type_subif: str
603 :return: Name and index of created sub-interface.
605 :raises RuntimeError: If it is not possible to create sub-interface.
608 outer_vlan_id = 'outer_vlan_id {0}'.format(outer_vlan_id)\
609 if outer_vlan_id else ''
611 inner_vlan_id = 'inner_vlan_id {0}'.format(inner_vlan_id)\
612 if inner_vlan_id else ''
614 if type_subif is None:
617 if isinstance(interface, basestring):
618 iface_key = Topology.get_interface_by_name(node, interface)
619 sw_if_index = Topology.get_interface_sw_index(node, iface_key)
621 sw_if_index = interface
623 output = VatExecutor.cmd_from_template(node, "create_sub_interface.vat",
624 sw_if_index=sw_if_index,
626 outer_vlan_id=outer_vlan_id,
627 inner_vlan_id=inner_vlan_id,
628 type_subif=type_subif)
630 if output[0]["retval"] == 0:
631 sw_subif_index = output[0]["sw_if_index"]
632 logger.trace('Created subinterface with index {}'
633 .format(sw_subif_index))
635 raise RuntimeError('Unable to create sub-interface on node {}'
636 .format(node['host']))
638 with VatTerminal(node, json_param=False) as vat:
639 vat.vat_terminal_exec_cmd('exec show interfaces')
641 name = '{}.{}'.format(interface, sub_id)
642 return name, sw_subif_index
645 def create_gre_tunnel_interface(node, source_ip, destination_ip):
646 """Create GRE tunnel interface on node.
648 :param node: VPP node to add tunnel interface.
649 :param source_ip: Source of the GRE tunnel.
650 :param destination_ip: Destination of the GRE tunnel.
653 :type destination_ip: str
654 :return: Name and index of created GRE tunnel interface.
656 :raises RuntimeError: If unable to create GRE tunnel interface.
658 output = VatExecutor.cmd_from_template(node, "create_gre.vat",
663 if output["retval"] == 0:
664 sw_if_index = output["sw_if_index"]
666 vat_executor = VatExecutor()
667 vat_executor.execute_script_json_out("dump_interfaces.vat", node)
668 interface_dump_json = vat_executor.get_script_stdout()
669 name = VatJsonUtil.get_interface_name_from_json(
670 interface_dump_json, sw_if_index)
671 return name, sw_if_index
673 raise RuntimeError('Unable to create GRE tunnel on node {}.'
677 def vpp_create_loopback(node):
678 """Create loopback interface on VPP node.
680 :param node: Node to create loopback interface on.
682 :return: SW interface index.
685 out = VatExecutor.cmd_from_template(node, "create_loopback.vat")
686 if out[0].get('retval') == 0:
687 return out[0].get('sw_if_index')
689 raise RuntimeError('Create loopback failed on node "{}"'
690 .format(node['host']))
693 def vpp_enable_input_acl_interface(node, interface, ip_version,
695 """Enable input acl on interface.
697 :param node: VPP node to setup interface for input acl.
698 :param interface: Interface to setup input acl.
699 :param ip_version: Version of IP protocol.
700 :param table_index: Classify table index.
702 :type interface: str or int
703 :type ip_version: str
704 :type table_index: int
706 if isinstance(interface, basestring):
707 sw_if_index = Topology.get_interface_sw_index(node, interface)
709 sw_if_index = interface
711 with VatTerminal(node) as vat:
712 vat.vat_terminal_exec_cmd_from_template("input_acl_int.vat",
713 sw_if_index=sw_if_index,
714 ip_version=ip_version,
715 table_index=table_index)
718 def get_interface_classify_table(node, interface):
719 """Get name of classify table for the given interface.
721 :param node: VPP node to get data from.
722 :param interface: Name or sw_if_index of a specific interface.
724 :type interface: str or int
725 :return: Classify table name.
728 if isinstance(interface, basestring):
729 sw_if_index = InterfaceUtil.get_sw_if_index(node, interface)
731 sw_if_index = interface
733 with VatTerminal(node) as vat:
734 data = vat.vat_terminal_exec_cmd_from_template(
735 "classify_interface_table.vat",
736 sw_if_index=sw_if_index
741 def get_sw_if_index(node, interface_name):
742 """Get sw_if_index for the given interface from actual interface dump.
744 :param node: VPP node to get interface data from.
745 :param interface_name: Name of the specific interface.
747 :type interface_name: str
748 :return: sw_if_index of the given interface.
752 with VatTerminal(node) as vat:
753 if_data = vat.vat_terminal_exec_cmd_from_template(
754 "interface_dump.vat")
755 for interface in if_data[0]:
756 if interface["interface_name"] == interface_name:
757 return interface["sw_if_index"]
762 def vxlan_gpe_dump(node, interface_name=None):
763 """Get VxLAN GPE data for the given interface.
765 :param node: VPP node to get interface data from.
766 :param interface_name: Name of the specific interface. If None,
767 information about all VxLAN GPE interfaces is returned.
769 :type interface_name: str
770 :return: Dictionary containing data for the given VxLAN GPE interface or
771 if interface=None, the list of dictionaries with all VxLAN GPE
776 with VatTerminal(node) as vat:
777 vxlan_gpe_data = vat.vat_terminal_exec_cmd_from_template(
778 "vxlan_gpe_dump.vat")
781 sw_if_index = InterfaceUtil.get_sw_if_index(node, interface_name)
783 for vxlan_gpe in vxlan_gpe_data[0]:
784 if vxlan_gpe["sw_if_index"] == sw_if_index:
788 return vxlan_gpe_data[0]
791 def vpp_proxy_arp_interface_enable(node, interface):
792 """Enable proxy ARP on interface.
794 :param node: VPP node to enable proxy ARP on interface.
795 :param interface: Interface to enable proxy ARP.
797 :type interface: str or int
799 if isinstance(interface, basestring):
800 sw_if_index = InterfaceUtil.get_sw_if_index(node, interface)
802 sw_if_index = interface
804 with VatTerminal(node) as vat:
805 vat.vat_terminal_exec_cmd_from_template(
806 "proxy_arp_intfc_enable.vat",
807 sw_if_index=sw_if_index)
810 def vpp_ip_source_check_setup(node, interface):
811 """Setup Reverse Path Forwarding source check on interface.
813 :param node: Node to setup RPF source check.
814 :param interface: Interface name to setup RPF source check.
818 with VatTerminal(node) as vat:
819 vat.vat_terminal_exec_cmd_from_template("ip_source_check.vat",
820 interface_name=interface)
823 def assign_interface_to_fib_table(node, interface, table_id):
824 """Assign VPP interface to specific VRF/FIB table.
826 :param node: VPP node where the FIB and interface are located.
827 :param interface: Interface to be assigned to FIB.
828 :param table_id: VRF table ID.
830 :type interface: str or int
833 if isinstance(interface, basestring):
834 sw_if_index = Topology.get_interface_sw_index(node, interface)
836 sw_if_index = interface
838 with VatTerminal(node) as vat:
839 vat.vat_terminal_exec_cmd_from_template("set_fib_to_interface.vat",
840 sw_index=sw_if_index,
844 def set_linux_interface_mac(node, interface, mac, namespace=None):
845 """Set MAC address for interface in linux.
847 :param node: Node where to execute command.
848 :param interface: Interface in namespace.
849 :param mac: MAC to be assigned to interface.
850 :param namespace: Execute command in namespace. Optional
856 if namespace is not None:
857 cmd = 'ip netns exec {} ip link set {} address {}'.format(
858 namespace, interface, mac)
860 cmd = 'ip link set {} address {}'.format(interface, mac)
861 exec_cmd_no_error(node, cmd, sudo=True)