1 .TH IP\-LINK 8 "13 Dec 2012" "iproute2" "Linux"
3 ip-link \- network device configuration
10 .RI " { " COMMAND " | "
43 .BR "ip link delete " {
56 .RB "[ { " up " | " down " } ]"
59 .IR "ETYPE TYPE_ARGS" " ]"
61 .RB "[ " arp " { " on " | " off " } ]"
63 .RB "[ " dynamic " { " on " | " off " } ]"
65 .RB "[ " multicast " { " on " | " off " } ]"
67 .RB "[ " allmulticast " { " on " | " off " } ]"
69 .RB "[ " promisc " { " on " | " off " } ]"
71 .RB "[ " protodown " { " on " | " off " } ]"
73 .RB "[ " trailers " { " on " | " off " } ]"
91 .IR PID " | " NETNSNAME " } ]"
105 .RI "[ " VFVLAN-LIST " ]"
116 .RB "[ " spoofchk " { " on " | " off " } ]"
118 .RB "[ " query_rss " { " on " | " off " } ]"
120 .RB "[ " state " { " auto " | " enable " | " disable " } ]"
122 .RB "[ " trust " { " on " | " off " } ]"
124 .RB "[ " node_guid " eui64 ]"
126 .RB "[ " port_guid " eui64 ] ]"
129 .RB "[ { " xdp " | " xdpgeneric " | " xdpdrv " } { " off " | "
136 .RB "[ " verbose " ] |"
145 .RB "[ " nomaster " ]"
150 .RB "[ " addrgenmode " { " eui64 " | " none " | " stable_secret " | " random " } ]"
152 .RB "[ " macaddr " { " flush " | { " add " | " del " } "
153 .IR MACADDR " | set [ "
155 .IR MACADDR " [ ... ] ] ] } ]"
160 .RI "[ " DEVICE " | "
216 .IR ETYPE " := [ " TYPE " |"
217 .BR bridge_slave " | " bond_slave " ]"
220 .IR VFVLAN-LIST " := [ " VFVLAN-LIST " ] " VFVLAN
229 .IR VLAN-PROTO " ] ]"
232 .SS ip link add - add virtual link
236 specifies the physical device to act operate on.
239 specifies the name of the new virtual device.
242 specifies the type of the new device.
248 - Ethernet Bridge device
253 - Controller Area Network interface
256 - Dummy network interface
259 - High-availability Seamless Redundancy device
262 - Intermediate Functional Block device
265 - IP over Infiniband device
268 - Virtual interface base on link layer address (MAC)
271 - Virtual interface based on link layer address (MAC) and TAP.
274 - Virtual Controller Area Network interface
277 - Virtual ethernet interface
280 - 802.1q tagged virtual LAN interface
283 - Virtual eXtended LAN
286 - Virtual tunnel interface IPv4|IPv6 over IPv6
289 - Virtual tunnel interface IPv4 over IPv4
292 - Virtual tunnel interface IPv6 over IPv4
295 - Virtual tunnel interface GRE over IPv4
298 - Virtual L2 tunnel interface GRE over IPv4
301 - Virtual tunnel interface GRE over IPv6
304 - Virtual L2 tunnel interface GRE over IPv6
307 - Virtual tunnel interface
310 - Netlink monitoring device
313 - Interface for L3 (IPv6/IPv4) based VLANs
316 - Interface for 6LoWPAN (IPv6) over IEEE 802.15.4 / Bluetooth
319 - GEneric NEtwork Virtualization Encapsulation
322 - Interface for IEEE 802.1AE MAC Security (MACsec)
325 - Interface for L3 VRF domains
329 .BI numtxqueues " QUEUE_COUNT "
330 specifies the number of transmit queues for new device.
333 .BI numrxqueues " QUEUE_COUNT "
334 specifies the number of receive queues for new device.
338 specifies the desired index of the new virtual device. The link creation fails, if the index is busy.
344 the following additional arguments are supported:
351 .BI protocol " VLAN_PROTO "
355 .BR reorder_hdr " { " on " | " off " } "
358 .BR gvrp " { " on " | " off " } "
361 .BR mvrp " { " on " | " off " } "
364 .BR loose_binding " { " on " | " off " } "
367 .BI ingress-qos-map " QOS-MAP "
370 .BI egress-qos-map " QOS-MAP "
375 .BI protocol " VLAN_PROTO "
376 - either 802.1Q or 802.1ad.
379 - specifies the VLAN Identifer to use. Note that numbers with a leading " 0 " or " 0x " are interpreted as octal or hexadeimal, respectively.
381 .BR reorder_hdr " { " on " | " off " } "
382 - specifies whether ethernet headers are reordered or not (default is
387 .BR reorder_hdr " is " on
388 then VLAN header will be not inserted immediately but only before passing to the
389 physical device (if this device does not support VLAN offloading), the similar
390 on the RX direction - by default the packet will be untagged before being
391 received by VLAN device. Reordering allows to accelerate tagging on egress and
392 to hide VLAN header on ingress so the packet looks like regular Ethernet packet,
393 at the same time it might be confusing for packet capture as the VLAN header
394 does not exist within the packet.
396 VLAN offloading can be checked by
402 .RB grep " tx-vlan-offload"
405 where <phy_dev> is the physical device to which VLAN device is bound.
408 .BR gvrp " { " on " | " off " } "
409 - specifies whether this VLAN should be registered using GARP VLAN Registration Protocol.
411 .BR mvrp " { " on " | " off " } "
412 - specifies whether this VLAN should be registered using Multiple VLAN Registration Protocol.
414 .BR loose_binding " { " on " | " off " } "
415 - specifies whether the VLAN device state is bound to the physical device state.
417 .BI ingress-qos-map " QOS-MAP "
418 - defines a mapping of VLAN header prio field to the Linux internal packet
419 priority on incoming frames. The format is FROM:TO with multiple mappings
422 .BI egress-qos-map " QOS-MAP "
423 - defines a mapping of Linux internal packet priority to VLAN header prio field
424 but for outgoing frames. The format is the same as for ingress-qos-map.
427 Linux packet priority can be set by
432 -t mangle -A POSTROUTING [...] -j CLASSIFY --set-class 0:4
435 and this "4" priority can be used in the egress qos mapping to set VLAN prio "5":
439 link set veth0.10 type vlan egress 4:5
448 the following additional arguments are supported:
450 .BI "ip link add " DEVICE
451 .BI type " vxlan " id " VNI"
454 .RB " ] [ { " group " | " remote " } "
458 .RI "{ "IPADDR " | "any " } "
464 .BI flowlabel " FLOWLABEL "
468 .BI srcport " MIN MAX "
482 .RB [ no ] udp6zerocsumtx
484 .RB [ no ] udp6zerocsumrx
486 .BI ageing " SECONDS "
488 .BI maxaddress " NUMBER "
500 - specifies the VXLAN Network Identifer (or VXLAN Segment
504 - specifies the physical device to use for tunnel endpoint communication.
508 - specifies the multicast IP address to join.
509 This parameter cannot be specified with the
515 - specifies the unicast destination IP address to use in outgoing packets
516 when the destination link layer address is not known in the VXLAN device
517 forwarding database. This parameter cannot be specified with the
523 - specifies the source IP address to use in outgoing packets.
527 - specifies the TTL value to use in outgoing packets.
531 - specifies the TOS value to use in outgoing packets.
534 .BI flowlabel " FLOWLABEL"
535 - specifies the flow label to use in outgoing packets.
539 - specifies the UDP destination port to communicate to the remote VXLAN tunnel endpoint.
542 .BI srcport " MIN MAX"
543 - specifies the range of port numbers to use as UDP
544 source ports to communicate to the remote VXLAN tunnel endpoint.
548 - specifies if unknown source link layer addresses and IP addresses
549 are entered into the VXLAN device forwarding database.
553 - specifies if route short circuit is turned on.
557 - specifies ARP proxy is turned on.
561 - specifies if netlink LLADDR miss notifications are generated.
565 - specifies if netlink IP ADDR miss notifications are generated.
569 - specifies if UDP checksum is calculated for transmitted packets over IPv4.
572 .RB [ no ] udp6zerocsumtx
573 - skip UDP checksum calculation for transmitted packets over IPv6.
576 .RB [ no ] udp6zerocsumrx
577 - allow incoming UDP packets over IPv6 with zero checksum field.
580 .BI ageing " SECONDS"
581 - specifies the lifetime in seconds of FDB entries learnt by the kernel.
584 .BI maxaddress " NUMBER"
585 - specifies the maximum number of FDB entries.
589 - specifies whether an external control plane
590 .RB "(e.g. " "ip route encap" )
591 or the internal FDB should be used.
595 - enables the Group Policy extension (VXLAN-GBP).
598 Allows to transport group policy context across VXLAN network peers.
599 If enabled, includes the mark of a packet in the VXLAN header for outgoing
600 packets and fills the packet mark based on the information found in the
601 VXLAN header for incomming packets.
603 Format of upper 16 bits of packet mark (flags);
606 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
608 |-|-|-|-|-|-|-|-|-|D|-|-|A|-|-|-|
610 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
613 Don't Learn bit. When set, this bit indicates that the egress
614 VTEP MUST NOT learn the source address of the encapsulated frame.
617 Indicates that the group policy has already been applied to
618 this packet. Policies MUST NOT be applied by devices when the A bit is set.
621 Format of lower 16 bits of packet mark (policy ID):
624 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
628 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
632 iptables -A OUTPUT [...] -j MARK --set-mark 0x800FF
638 - enables the Generic Protocol extension (VXLAN-GPE). Currently, this is
639 only supported together with the
646 GRE, IPIP, SIT Type Support
649 the following additional arguments are supported:
651 .BI "ip link add " DEVICE
652 .BR type " { " gre " | " ipip " | " sit " }"
653 .BI " remote " ADDR " local " ADDR
655 .BR encap " { " fou " | " gue " | " none " }"
657 .BR encap-sport " { " \fIPORT " | " auto " }"
659 .BI "encap-dport " PORT
661 .RB [ no ] encap-csum
663 .RB [ no ] encap-remcsum
669 - specifies the remote address of the tunnel.
673 - specifies the fixed local address for tunneled packets.
674 It must be an address on another interface on this host.
677 .BR encap " { " fou " | " gue " | " none " }"
678 - specifies type of secondary UDP encapsulation. "fou" indicates
679 Foo-Over-UDP, "gue" indicates Generic UDP Encapsulation.
682 .BR encap-sport " { " \fIPORT " | " auto " }"
683 - specifies the source port in UDP encapsulation.
685 indicates the port by number, "auto"
686 indicates that the port number should be chosen automatically
687 (the kernel picks a flow based on the flow hash of the
688 encapsulated packet).
691 .RB [ no ] encap-csum
692 - specifies if UDP checksums are enabled in the secondary
696 .RB [ no ] encap-remcsum
697 - specifies if Remote Checksum Offload is enabled. This is only
698 applicable for Generic UDP Encapsulation.
703 IP6GRE/IP6GRETAP Type Support
706 the following additional arguments are supported:
708 .BI "ip link add " DEVICE
709 .BR type " { " ip6gre " | " ip6gretap " }"
710 .BI remote " ADDR " local " ADDR"
721 .BI encaplimit " ELIM "
723 .BI tclass " TCLASS "
725 .BI flowlabel " FLOWLABEL "
735 - specifies the remote IPv6 address of the tunnel.
739 - specifies the fixed local IPv6 address for tunneled packets.
740 It must be an address on another interface on this host.
747 flag enables sequencing of outgoing packets.
750 flag requires that all input packets are serialized.
753 .RB [ i | o ] key " \fIKEY"
754 - use keyed GRE with key
756 is either a number or an IPv4 address-like dotted quad.
759 parameter specifies the same key to use in both directions.
761 .BR ikey " and " okey
762 parameters specify different keys for input and output.
766 - generate/require checksums for tunneled packets.
769 flag calculates checksums for outgoing packets.
772 flag requires that all input packets have the correct
775 flag is equivalent to the combination
780 - specifies Hop Limit value to use in outgoing packets.
783 .BI encaplimit " ELIM"
784 - specifies a fixed encapsulation limit. Default is 4.
787 .BI flowlabel " FLOWLABEL"
788 - specifies a fixed flowlabel.
792 - specifies the traffic class field on
793 tunneled packets, which can be specified as either a two-digit
794 hex value (e.g. c0) or a predefined string (e.g. internet).
797 causes the field to be copied from the original IP header. The
799 .BI "inherit/" STRING
801 .BI "inherit/" 00 ".." ff
802 will set the field to
806 when tunneling non-IP packets. The default value is 00.
814 the following additional arguments are supported:
816 .BI "ip link add " DEVICE " name " NAME
817 .BR "type ipoib " [ " pkey \fIPKEY" " ] [ " mode " \fIMODE \fR]"
822 - specifies the IB P-Key to use.
825 - specifies the mode (datagram or connected) to use.
831 the following additional arguments are supported:
833 .BI "ip link add " DEVICE
834 .BI type " geneve " id " VNI " remote " IPADDR"
840 .BI flowlabel " FLOWLABEL "
848 .RB [ no ] udp6zerocsumtx
850 .RB [ no ] udp6zerocsumrx
856 - specifies the Virtual Network Identifer to use.
860 - specifies the unicast destination IP address to use in outgoing packets.
864 - specifies the TTL value to use in outgoing packets.
868 - specifies the TOS value to use in outgoing packets.
871 .BI flowlabel " FLOWLABEL"
872 - specifies the flow label to use in outgoing packets.
876 - select a destination port other than the default of 6081.
880 - make this tunnel externally controlled (or not, which is the default). This
881 flag is mutually exclusive with the
885 .BR tos " and " flowlabel
890 - specifies if UDP checksum is calculated for transmitted packets over IPv4.
893 .RB [ no ] udp6zerocsumtx
894 - skip UDP checksum calculation for transmitted packets over IPv6.
897 .RB [ no ] udp6zerocsumrx
898 - allow incoming UDP packets over IPv6 with zero checksum field.
903 MACVLAN and MACVTAP Type Support
908 the following additional arguments are supported:
910 .BI "ip link add link " DEVICE " name " NAME
911 .BR type " { " macvlan " | " macvtap " } "
912 .BR mode " { " private " | " vepa " | " bridge " | " passthru
913 .RB " [ " nopromisc " ] | " source " } "
917 .BR type " { " macvlan " | " macvtap " } "
918 - specifies the link type to use.
919 .BR macvlan " creates just a virtual interface, while "
920 .BR macvtap " in addition creates a character device "
921 .BR /dev/tapX " to be used just like a " tuntap " device."
924 - Do not allow communication between
926 instances on the same physical interface, even if the external switch supports
930 - Virtual Ethernet Port Aggregator mode. Data from one
932 instance to the other on the same physical interface is transmitted over the
933 physical interface. Either the attached switch needs to support hairpin mode,
934 or there must be a TCP/IP router forwarding the packets in order to allow
935 communication. This is the default mode.
938 - In bridge mode, all endpoints are directly connected to each other,
939 communication is not redirected through the physical interface's peer.
941 .BR mode " " passthru " [ " nopromisc " ] "
942 - This mode gives more power to a single endpoint, usually in
943 .BR macvtap " mode. It is not allowed for more than one endpoint on the same "
944 physical interface. All traffic will be forwarded to this endpoint, allowing
945 virtio guests to change MAC address or set promiscuous mode in order to bridge
946 the interface or create vlan interfaces on top of it. By default, this mode
947 forces the underlying interface into promiscuous mode. Passing the
948 .BR nopromisc " flag prevents this, so the promisc flag may be controlled "
949 using standard tools.
952 - allows one to set a list of allowed mac address, which is used to match
953 against source mac address from received frames on underlying interface. This
954 allows creating mac based VLAN associations, instead of standard port or tag
955 based. The feature is useful to deploy 802.1x mac based behavior,
956 where drivers of underlying interfaces doesn't allows that.
960 High-availability Seamless Redundancy (HSR) Support
963 the following additional arguments are supported:
965 .BI "ip link add link " DEVICE " name " NAME " type hsr"
966 .BI slave1 " SLAVE1-IF " slave2 " SLAVE2-IF "
969 .BR version " { " 0 " | " 1 " } ]"
974 - specifies the link type to use, here HSR.
976 .BI slave1 " SLAVE1-IF "
977 - Specifies the physical device used for the first of the two ring ports.
979 .BI slave2 " SLAVE2-IF "
980 - Specifies the physical device used for the second of the two ring ports.
982 .BI supervision " ADDR-BYTE"
983 - The last byte of the multicast address used for HSR supervision frames.
984 Default option is "0", possible values 0-255.
986 .BR version " { " 0 " | " 1 " }"
987 - Selects the protocol version of the interface. Default option is "0", which
988 corresponds to the 2010 version of the HSR standard. Option "1" activates the
996 the following additional arguments are supported:
998 .BI "ip link add " DEVICE " type bridge "
1000 .BI ageing_time " AGEING_TIME "
1002 .BI group_fwd_mask " MASK "
1004 .BI group_address " ADDRESS "
1006 .BI forward_delay " FORWARD_DELAY "
1008 .BI hello_time " HELLO_TIME "
1010 .BI max_age " MAX_AGE "
1012 .BI stp_state " STP_STATE "
1014 .BI priority " PRIORITY "
1016 .BI vlan_filtering " VLAN_FILTERING "
1018 .BI vlan_protocol " VLAN_PROTOCOL "
1020 .BI vlan_default_pvid " VLAN_DEFAULT_PVID "
1022 .BI vlan_stats_enabled " VLAN_STATS_ENABLED "
1024 .BI mcast_snooping " MULTICAST_SNOOPING "
1026 .BI mcast_router " MULTICAST_ROUTER "
1028 .BI mcast_query_use_ifaddr " MCAST_QUERY_USE_IFADDR "
1030 .BI mcast_querier " MULTICAST_QUERIER "
1032 .BI mcast_hash_elasticity " HASH_ELASTICITY "
1034 .BI mcast_hash_max " HASH_MAX "
1036 .BI mcast_last_member_count " LAST_MEMBER_COUNT "
1038 .BI mcast_startup_query_count " STARTUP_QUERY_COUNT "
1040 .BI mcast_last_member_interval " LAST_MEMBER_INTERVAL "
1042 .BI mcast_membership_interval " MEMBERSHIP_INTERVAL "
1044 .BI mcast_querier_interval " QUERIER_INTERVAL "
1046 .BI mcast_query_interval " QUERY_INTERVAL "
1048 .BI mcast_query_response_interval " QUERY_RESPONSE_INTERVAL "
1050 .BI mcast_startup_query_interval " STARTUP_QUERY_INTERVAL "
1052 .BI mcast_stats_enabled " MCAST_STATS_ENABLED "
1054 .BI mcast_igmp_version " IGMP_VERSION "
1056 .BI mcast_mld_version " MLD_VERSION "
1058 .BI nf_call_iptables " NF_CALL_IPTABLES "
1060 .BI nf_call_ip6tables " NF_CALL_IP6TABLES "
1062 .BI nf_call_arptables " NF_CALL_ARPTABLES "
1067 .BI ageing_time " AGEING_TIME "
1068 - configure the bridge's FDB entries ageing time, ie the number of seconds a MAC address will be kept in the FDB after a packet has been received from that address. after this time has passed, entries are cleaned up.
1070 .BI group_fwd_mask " MASK "
1071 - set the group forward mask. This is the bitmask that is applied to decide whether to forward incoming frames destined to link-local addresses, ie addresses of the form 01:80:C2:00:00:0X (defaults to 0, ie the bridge does not forward any link-local frames).
1073 .BI group_address " ADDRESS "
1074 - set the MAC address of the multicast group this bridge uses for STP. The address must be a link-local address in standard Ethernet MAC address format, ie an address of the form 01:80:C2:00:00:0X, with X in [0, 4..f].
1076 .BI forward_delay " FORWARD_DELAY "
1077 - set the forwarding delay in seconds, ie the time spent in LISTENING state (before moving to LEARNING) and in LEARNING state (before moving to FORWARDING). Only relevant if STP is enabled. Valid values are between 2 and 30.
1079 .BI hello_time " HELLO_TIME "
1080 - set the time in seconds between hello packets sent by the bridge, when it is a root bridge or a designated bridges. Only relevant if STP is enabled. Valid values are between 1 and 10.
1082 .BI max_age " MAX_AGE "
1083 - set the hello packet timeout, ie the time in seconds until another bridge in the spanning tree is assumed to be dead, after reception of its last hello message. Only relevant if STP is enabled. Valid values are between 6 and 40.
1085 .BI stp_state " STP_STATE "
1086 - turn spanning tree protocol on
1087 .RI ( STP_STATE " > 0) "
1089 .RI ( STP_STATE " == 0). "
1092 .BI priority " PRIORITY "
1093 - set this bridge's spanning tree priority, used during STP root bridge election.
1095 is a 16bit unsigned integer.
1097 .BI vlan_filtering " VLAN_FILTERING "
1098 - turn VLAN filtering on
1099 .RI ( VLAN_FILTERING " > 0) "
1101 .RI ( VLAN_FILTERING " == 0). "
1102 When disabled, the bridge will not consider the VLAN tag when handling packets.
1104 .BR vlan_protocol " { " 802.1Q " | " 802.1ad " } "
1105 - set the protocol used for VLAN filtering.
1107 .BI vlan_default_pvid " VLAN_DEFAULT_PVID "
1108 - set the default PVID (native/untagged VLAN ID) for this bridge.
1110 .BI vlan_stats_enabled " VLAN_STATS_ENABLED "
1112 .RI ( VLAN_STATS_ENABLED " == 1) "
1114 .RI ( VLAN_STATS_ENABLED " == 0) "
1115 per-VLAN stats accounting.
1117 .BI mcast_snooping " MULTICAST_SNOOPING "
1118 - turn multicast snooping on
1119 .RI ( MULTICAST_SNOOPING " > 0) "
1121 .RI ( MULTICAST_SNOOPING " == 0). "
1123 .BI mcast_router " MULTICAST_ROUTER "
1124 - set bridge's multicast router if IGMP snooping is enabled.
1126 is an integer value having the following meaning:
1133 - automatic (queried).
1136 - permanently enabled.
1139 .BI mcast_query_use_ifaddr " MCAST_QUERY_USE_IFADDR "
1140 - whether to use the bridge's own IP address as source address for IGMP queries
1141 .RI ( MCAST_QUERY_USE_IFADDR " > 0) "
1142 or the default of 0.0.0.0
1143 .RI ( MCAST_QUERY_USE_IFADDR " == 0). "
1145 .BI mcast_querier " MULTICAST_QUERIER "
1147 .RI ( MULTICAST_QUERIER " > 0) "
1149 .RI ( MULTICAST_QUERIER " == 0) "
1150 IGMP querier, ie sending of multicast queries by the bridge (default: disabled).
1152 .BI mcast_querier_interval " QUERIER_INTERVAL "
1153 - interval between queries sent by other routers. if no queries are seen after this delay has passed, the bridge will start to send its own queries (as if
1157 .BI mcast_hash_elasticity " HASH_ELASTICITY "
1158 - set multicast database hash elasticity, ie the maximum chain length in the multicast hash table (defaults to 4).
1160 .BI mcast_hash_max " HASH_MAX "
1161 - set maximum size of multicast hash table (defaults to 512, value must be a power of 2).
1163 .BI mcast_last_member_count " LAST_MEMBER_COUNT "
1164 - set multicast last member count, ie the number of queries the bridge will send before stopping forwarding a multicast group after a "leave" message has been received (defaults to 2).
1166 .BI mcast_last_member_interval " LAST_MEMBER_INTERVAL "
1167 - interval between queries to find remaining members of a group, after a "leave" message is received.
1169 .BI mcast_startup_query_count " STARTUP_QUERY_COUNT "
1170 - set the number of IGMP queries to send during startup phase (defaults to 2).
1172 .BI mcast_startup_query_interval " STARTUP_QUERY_INTERVAL "
1173 - interval between queries in the startup phase.
1175 .BI mcast_query_interval " QUERY_INTERVAL "
1176 - interval between queries sent by the bridge after the end of the startup phase.
1178 .BI mcast_query_response_interval " QUERY_RESPONSE_INTERVAL "
1179 - set the Max Response Time/Maximum Response Delay for IGMP/MLD queries sent by the bridge.
1181 .BI mcast_membership_interval " MEMBERSHIP_INTERVAL "
1182 - delay after which the bridge will leave a group, if no membership reports for this group are received.
1184 .BI mcast_stats_enabled " MCAST_STATS_ENABLED "
1186 .RI ( MCAST_STATS_ENABLED " > 0) "
1188 .RI ( MCAST_STATS_ENABLED " == 0) "
1189 multicast (IGMP/MLD) stats accounting.
1191 .BI mcast_igmp_version " IGMP_VERSION "
1192 - set the IGMP version.
1194 .BI mcast_mld_version " MLD_VERSION "
1195 - set the MLD version.
1197 .BI nf_call_iptables " NF_CALL_IPTABLES "
1199 .RI ( NF_CALL_IPTABLES " > 0) "
1201 .RI ( NF_CALL_IPTABLES " == 0) "
1202 iptables hooks on the bridge.
1204 .BI nf_call_ip6tables " NF_CALL_IP6TABLES "
1206 .RI ( NF_CALL_IP6TABLES " > 0) "
1208 .RI ( NF_CALL_IP6TABLES " == 0) "
1209 ip6tables hooks on the bridge.
1211 .BI nf_call_arptables " NF_CALL_ARPTABLES "
1213 .RI ( NF_CALL_ARPTABLES " > 0) "
1215 .RI ( NF_CALL_ARPTABLES " == 0) "
1216 arptables hooks on the bridge.
1225 the following additional arguments are supported:
1227 .BI "ip link add link " DEVICE " name " NAME " type macsec"
1229 .BI address " <lladdr>"
1235 .BI cipher " CIPHER_SUITE"
1240 .BR on " | " off " } ] [ "
1241 .BR send_sci " { " on " | " off " } ] ["
1242 .BR end_station " { " on " | " off " } ] ["
1243 .BR scb " { " on " | " off " } ] ["
1244 .BR protect " { " on " | " off " } ] ["
1245 .BR replay " { " on " | " off " }"
1247 .IR 0..2^32-1 " } ] ["
1248 .BR validate " { " strict " | " check " | " disabled " } ] ["
1249 .BR encodingsa " { "
1254 .BI address " <lladdr> "
1255 - sets the system identifier component of secure channel for this MACsec device.
1259 - sets the port number component of secure channel for this MACsec device, in a
1260 range from 1 to 65535 inclusive. Numbers with a leading " 0 " or " 0x " are
1261 interpreted as octal and hexadecimal, respectively.
1265 - sets the secure channel identifier for this MACsec device.
1267 is a 64bit wide number in hexadecimal format.
1270 .BI cipher " CIPHER_SUITE "
1271 - defines the cipher suite to use.
1274 .BI icvlen " LENGTH "
1275 - sets the length of the Integrity Check Value (ICV).
1278 .BR "encrypt on " or " encrypt off"
1279 - switches between authenticated encryption, or authenticity mode only.
1282 .BR "send_sci on " or " send_sci off"
1283 - specifies whether the SCI is included in every packet, or only when it is necessary.
1286 .BR "end_station on " or " end_station off"
1287 - sets the End Station bit.
1290 .BR "scb on " or " scb off"
1291 - sets the Single Copy Broadcast bit.
1294 .BR "protect on " or " protect off"
1295 - enables MACsec protection on the device.
1298 .BR "replay on " or " replay off"
1299 - enables replay protection on the device.
1305 - sets the size of the replay window.
1310 .BR "validate strict " or " validate check " or " validate disabled"
1311 - sets the validation mode on the device.
1314 .BI encodingsa " AN "
1315 - sets the active secure association for transmission.
1323 the following additional arguments are supported:
1325 .BI "ip link add " DEVICE " type vrf table " TABLE
1329 .BR table " table id associated with VRF device"
1333 .SS ip link delete - delete virtual link
1337 specifies the virtual device to act operate on.
1341 specifies the group of virtual links to delete. Group 0 is not allowed to be
1342 deleted since it is the default group.
1346 specifies the type of the device.
1348 .SS ip link set - change device attributes
1352 If multiple parameter changes are requested,
1354 aborts immediately after any of the changes have failed.
1355 This is the only case when
1357 can move the system to an unpredictable state. The solution
1358 is to avoid changing several parameters with one
1365 specifies network device to operate on. When configuring SR-IOV Virtual Function
1366 (VF) devices, this keyword should specify the associated Physical Function (PF)
1372 has a dual role: If both group and dev are present, then move the device to the
1373 specified group. If only a group is specified, then the command operates on
1374 all devices in that group.
1378 change the state of the device to
1384 .BR "arp on " or " arp off"
1390 .BR "multicast on " or " multicast off"
1396 .BR "protodown on " or " protodown off"
1399 state on the device. Indicates that a protocol error has been detected on the port. Switch drivers can react to this error by doing a phys down on the switch port.
1402 .BR "dynamic on " or " dynamic off"
1405 flag on the device. Indicates that address can change when interface goes down (currently
1411 change the name of the device. This operation is not
1412 recommended if the device is running or has some addresses
1416 .BI txqueuelen " NUMBER"
1418 .BI txqlen " NUMBER"
1419 change the transmit queue length of the device.
1428 .BI address " LLADDRESS"
1429 change the station address of the interface.
1432 .BI broadcast " LLADDRESS"
1434 .BI brd " LLADDRESS"
1436 .BI peer " LLADDRESS"
1437 change the link layer broadcast address or the peer address when
1442 .BI netns " NETNSNAME " \fR| " PID"
1443 move the device to the network namespace associated with name
1447 Some devices are not allowed to change network namespace: loopback, bridge,
1448 ppp, wireless. These are network namespace local devices. In such case
1450 tool will return "Invalid argument" error. It is possible to find out if device is local
1451 to a single network namespace by checking
1453 flag in the output of the
1461 To change network namespace for wireless devices the
1463 tool can be used. But it allows to change network namespace only for physical devices and by process
1468 give the device a symbolic name for easy reference.
1472 specify the group the device belongs to.
1473 The available groups are listed in file
1474 .BR "@SYSCONFDIR@/group" .
1478 specify a Virtual Function device to be configured. The associated PF device
1479 must be specified using the
1484 .BI mac " LLADDRESS"
1485 - change the station address for the specified VF. The
1487 parameter must be specified.
1491 - change the assigned VLAN for the specified VF. When specified, all traffic
1492 sent from the VF will be tagged with the specified VLAN ID. Incoming traffic
1493 will be filtered for the specified VLAN ID, and will have all VLAN tags
1494 stripped before being passed to the VF. Setting this parameter to 0 disables
1495 VLAN tagging and filtering. The
1497 parameter must be specified.
1501 - assign VLAN QOS (priority) bits for the VLAN tag. When specified, all VLAN
1502 tags transmitted by the VF will include the specified priority bits in the
1503 VLAN tag. If not specified, the value is assumed to be 0. Both the
1507 parameters must be specified. Setting both
1511 as 0 disables VLAN tagging and filtering for the VF.
1514 .BI proto " VLAN-PROTO"
1515 - assign VLAN PROTOCOL for the VLAN tag, either 802.1Q or 802.1ad.
1516 Setting to 802.1ad, all traffic sent from the VF will be tagged with VLAN S-Tag.
1517 Incoming traffic will have VLAN S-Tags stripped before being passed to the VF.
1518 Setting to 802.1ad also enables an option to concatenate another VLAN tag, so both
1519 S-TAG and C-TAG will be inserted/stripped for outgoing/incoming traffic, respectively.
1520 If not specified, the value is assumed to be 802.1Q. Both the
1524 parameters must be specified.
1528 -- change the allowed transmit bandwidth, in Mbps, for the specified VF.
1529 Setting this parameter to 0 disables rate limiting.
1531 parameter must be specified.
1537 .BI max_tx_rate " TXRATE"
1538 - change the allowed maximum transmit bandwidth, in Mbps, for the specified VF.
1540 parameter must be specified.
1543 .BI min_tx_rate " TXRATE"
1544 - change the allowed minimum transmit bandwidth, in Mbps, for the specified VF.
1545 Minimum TXRATE should be always <= Maximum TXRATE.
1547 parameter must be specified.
1550 .BI spoofchk " on|off"
1551 - turn packet spoof checking on or off for the specified VF.
1553 .BI query_rss " on|off"
1554 - toggle the ability of querying the RSS configuration of a specific VF. VF RSS information like RSS hash key may be considered sensitive on some devices where this information is shared between VF and PF and thus its querying may be prohibited by default.
1556 .BI state " auto|enable|disable"
1557 - set the virtual link state as seen by the specified VF. Setting to auto means a
1558 reflection of the PF link state, enable lets the VF to communicate with other VFs on
1559 this host even if the PF link state is down, disable causes the HW to drop any packets
1563 - trust the specified VF user. This enables that VF user can set a specific feature
1564 which may impact security and/or performance. (e.g. VF multicast promiscuous mode)
1566 .BI node_guid " eui64"
1567 - configure node GUID for Infiniband VFs.
1569 .BI port_guid " eui64"
1570 - configure port GUID for Infiniband VFs.
1574 .B xdp object "|" pinned "|" off
1575 set (or unset) a XDP ("eXpress Data Path") BPF program to run on every
1576 packet at driver level.
1578 output will indicate a
1580 flag for the networking device. If the driver does not have native XDP
1581 support, the kernel will fall back to a slower, driver-independent "generic"
1584 output will in that case indicate
1588 only. If the driver does have native XDP support, but the program is
1590 .B xdpgeneric object "|" pinned
1591 then the kernel will use the generic XDP variant instead of the native one.
1593 has the opposite effect of requestsing that the automatic fallback to the
1594 generic XDP variant be disabled and in case driver is not XDP-capable error
1597 also disables hardware offloads.
1603 - Detaches any currently attached XDP/BPF program from the given device.
1606 - Attaches a XDP/BPF program to the given device. The
1608 points to a BPF ELF file (f.e. generated by LLVM) that contains the BPF
1609 program code, map specifications, etc. If a XDP/BPF program is already
1610 attached to the given device, an error will be thrown. If no XDP/BPF
1611 program is currently attached, the device supports XDP and the program
1612 from the BPF ELF file passes the kernel verifier, then it will be attached
1613 to the device. If the option
1617 then any prior attached XDP/BPF program will be atomically overridden and
1618 no error will be thrown in this case. If no
1620 option is passed, then the default section name ("prog") will be assumed,
1621 otherwise the provided section name will be used. If no
1623 option is passed, then a verifier log will only be dumped on load error.
1626 section for usage examples.
1628 .BI section " NAME "
1629 - Specifies a section name that contains the BPF program code. If no section
1630 name is specified, the default one ("prog") will be used. This option is
1631 to be passed with the
1636 - Act in verbose mode. For example, even in case of success, this will
1637 print the verifier log in case a program was loaded from a BPF ELF file.
1640 - Attaches a XDP/BPF program to the given device. The
1642 points to an already pinned BPF program in the BPF file system. The option
1644 doesn't apply here, but otherwise semantics are the same as with the option
1649 .BI master " DEVICE"
1650 set master device of the device (enslave device).
1654 unset master device of the device (release device).
1657 .BI addrgenmode " eui64|none|stable_secret|random"
1658 set the IPv6 address generation mode
1661 - use a Modified EUI-64 format interface identifier
1664 - disable automatic address generation
1667 - generate the interface identifier based on a preset /proc/sys/net/ipv6/conf/{default,DEVICE}/stable_secret
1670 - like stable_secret, but auto-generate a new random secret if none is set
1674 set peer netnsid for a cross-netns interface
1677 .BI type " ETYPE TYPE_ARGS"
1678 Change type-specific settings. For a list of supported types and arguments refer
1679 to the description of
1681 above. In addition to that, it is possible to manipulate settings to slave
1685 Bridge Slave Support
1686 For a link with master
1688 the following additional arguments are supported:
1690 .B "ip link set type bridge_slave"
1696 .BI priority " PRIO"
1700 .BR guard " { " on " | " off " }"
1702 .BR hairpin " { " on " | " off " }"
1704 .BR fastleave " { " on " | " off " }"
1706 .BR root_block " { " on " | " off " }"
1708 .BR learning " { " on " | " off " }"
1710 .BR flood " { " on " | " off " }"
1712 .BR proxy_arp " { " on " | " off " }"
1714 .BR proxy_arp_wifi " { " on " | " off " }"
1716 .BI mcast_router " MULTICAST_ROUTER"
1718 .BR mcast_fast_leave " { " on " | " off "}"
1720 .BR mcast_flood " { " on " | " off " } ]"
1725 - flush bridge slave's fdb dynamic entries.
1730 is a number representing the following states:
1731 .BR 0 " (disabled),"
1732 .BR 1 " (listening),"
1733 .BR 2 " (learning),"
1734 .BR 3 " (forwarding),"
1735 .BR 4 " (blocking)."
1737 .BI priority " PRIO"
1738 - set port priority (allowed values are between 0 and 63, inclusively).
1741 - set port cost (allowed values are between 1 and 65535, inclusively).
1743 .BR guard " { " on " | " off " }"
1744 - block incoming BPDU packets on this port.
1746 .BR hairpin " { " on " | " off " }"
1747 - enable hairpin mode on this port. This will allow incoming packets on this
1748 port to be reflected back.
1750 .BR fastleave " { " on " | " off " }"
1751 - enable multicast fast leave on this port.
1753 .BR root_block " { " on " | " off " }"
1754 - block this port from becoming the bridge's root port.
1756 .BR learning " { " on " | " off " }"
1757 - allow MAC address learning on this port.
1759 .BR flood " { " on " | " off " }"
1760 - open the flood gates on this port, i.e. forward all unicast frames to this
1762 .BR proxy_arp " and " proxy_arp_wifi
1765 .BR proxy_arp " { " on " | " off " }"
1766 - enable proxy ARP on this port.
1768 .BR proxy_arp_wifi " { " on " | " off " }"
1769 - enable proxy ARP on this port which meets extended requirements by IEEE
1770 802.11 and Hotspot 2.0 specifications.
1772 .BI mcast_router " MULTICAST_ROUTER"
1773 - configure this port for having multicast routers attached. A port with a
1774 multicast router will receive all multicast traffic.
1778 to disable multicast routers on this port,
1780 to let the system detect the presence of of routers (this is the default),
1782 to permanently enable multicast traffic forwarding on this port or
1784 to enable multicast routers temporarily on this port, not depending on incoming
1787 .BR mcast_fast_leave " { " on " | " off " }"
1788 - this is a synonym to the
1792 .BR mcast_flood " { " on " | " off " }"
1793 - controls whether a given port will be flooded with multicast traffic for which there is no MDB entry.
1798 Bonding Slave Support
1799 For a link with master
1801 the following additional arguments are supported:
1803 .B "ip link set type bond_slave"
1811 - set the slave's queue ID (a 16bit unsigned value).
1816 MACVLAN and MACVTAP Support
1817 Modify list of allowed macaddr for link in source mode.
1819 .B "ip link set type { macvlan | macvap } "
1821 .BI macaddr " " "" COMMAND " " MACADDR " ..."
1827 - add MACADDR to allowed list
1830 - replace allowed list
1833 - remove MACADDR from allowed list
1836 - flush whole allowed list
1841 .SS ip link show - display device attributes
1844 .BI dev " NAME " (default)
1846 specifies the network device to show.
1847 If this argument is omitted all devices in the default group are listed.
1852 specifies what group of devices to show.
1856 only display running interfaces.
1859 .BI master " DEVICE "
1861 specifies the master device which enslaves devices to show.
1866 speficies the VRF which enslaves devices to show.
1871 specifies the type of devices to show.
1873 Note that the type name is not checked against the list of supported types -
1874 instead it is sent as-is to the kernel. Later it is used to filter the returned
1875 interface list by comparing it with the relevant attribute in case the kernel
1876 didn't filter already. Therefore any string is accepted, but may lead to empty
1879 .SS ip link xstats - display extended statistics
1884 specifies the type of devices to display extended statistics for.
1886 .SS ip link afstats - display address-family specific statistics
1891 specifies the device to display address-family statistics for.
1893 .SS ip link help - display help
1897 specifies which help of link type to dislpay.
1901 may be a number or a string from the file
1902 .B @SYSCONFDIR@/group
1903 which can be manually filled.
1909 Shows the state of all network interfaces on the system.
1912 ip link show type bridge
1914 Shows the bridge devices.
1917 ip link show type vlan
1919 Shows the vlan devices.
1922 ip link show master br0
1924 Shows devices enslaved by br0
1927 ip link set dev ppp0 mtu 1400
1929 Change the MTU the ppp0 device.
1932 ip link add link eth0 name eth0.10 type vlan id 10
1934 Creates a new vlan device eth0.10 on device eth0.
1937 ip link delete dev eth0.10
1939 Removes vlan device.
1944 Display help for the gre link type.
1947 ip link add name tun1 type ipip remote 192.168.1.1
1948 local 192.168.1.2 ttl 225 encap gue encap-sport auto
1949 encap-dport 5555 encap-csum encap-remcsum
1951 Creates an IPIP that is encapsulated with Generic UDP Encapsulation,
1952 and the outer UDP checksum and remote checksum offload are enabled.
1955 ip link set dev eth0 xdp obj prog.o
1957 Attaches a XDP/BPF program to device eth0, where the program is
1958 located in prog.o, section "prog" (default section). In case a
1959 XDP/BPF program is already attached, throw an error.
1962 ip -force link set dev eth0 xdp obj prog.o sec foo
1964 Attaches a XDP/BPF program to device eth0, where the program is
1965 located in prog.o, section "foo". In case a XDP/BPF program is
1966 already attached, it will be overridden by the new one.
1969 ip -force link set dev eth0 xdp pinned /sys/fs/bpf/foo
1971 Attaches a XDP/BPF program to device eth0, where the program was
1972 previously pinned as an object node into BPF file system under
1976 ip link set dev eth0 xdp off
1978 If a XDP/BPF program is attached on device eth0, detach it and
1979 effectively turn off XDP for device eth0.
1982 ip link add link wpan0 lowpan0 type lowpan
1984 Creates a 6LoWPAN interface named lowpan0 on the underlying
1985 IEEE 802.15.4 device wpan0.
1996 Original Manpage by Michail Litvak <mci@owl.openwall.com>