NAME | SYNOPSIS | DESCRIPTION | OPTIONS | NOTES | SEE ALSO | COLOPHON

Flower filter in tc(8)              Linux             Flower filter in tc(8)

NAME         top

       flower - flow based traffic control filter

SYNOPSIS         top

       tc filter ... flower [ MATCH_LIST ] [ action ACTION_SPEC ] [ classid
               CLASSID ]

       MATCH_LIST := [ MATCH_LIST ] MATCH

       MATCH := { indev ifname | skip_sw | skip_hw  | { dst_mac | src_mac }
               MASKED_LLADDR | vlan_id VID | vlan_prio PRIORITY |
               vlan_ethtype { ipv4 | ipv6 | ETH_TYPE } | ip_proto { tcp |
               udp | sctp | icmp | icmpv6 | IP_PROTO } | ip_tos
               MASKED_IP_TOS | ip_ttl MASKED_IP_TTL | { dst_ip | src_ip }
               PREFIX | { dst_port | src_port } port_number } | tcp_flags
               MASKED_TCP_FLAGS | type MASKED_TYPE | code MASKED_CODE | {
               arp_tip | arp_sip } IPV4_PREFIX | arp_op { request | reply |
               OP } | { arp_tha | arp_sha } MASKED_LLADDR | enc_key_id KEY-
               ID | { enc_dst_ip | enc_src_ip } { ipv4_address |
               ipv6_address } | enc_dst_port port_number | ip_flags IP_FLAGS

DESCRIPTION         top

       The flower filter matches flows to the set of keys specified and
       assigns an arbitrarily chosen class ID to packets belonging to them.
       Additionally (or alternatively) an action from the generic action
       framework may be called.

OPTIONS         top

       action ACTION_SPEC
              Apply an action from the generic actions framework on matching
              packets.

       classid CLASSID
              Specify a class to pass matching packets on to.  CLASSID is in
              the form X:Y, while X and Y are interpreted as numbers in
              hexadecimal format.

       indev ifname
              Match on incoming interface name. Obviously this makes sense
              only for forwarded flows.  ifname is the name of an interface
              which must exist at the time of tc invocation.

       skip_sw
              Do not process filter by software. If hardware has no offload
              support for this filter, or TC offload is not enabled for the
              interface, operation will fail.

       skip_hw
              Do not process filter by hardware.

       dst_mac MASKED_LLADDR
       src_mac MASKED_LLADDR
              Match on source or destination MAC address.  A mask may be
              optionally provided to limit the bits of the address which are
              matched. A mask is provided by following the address with a
              slash and then the mask. It may be provided in LLADDR format,
              in which case it is a bitwise mask, or as a number of high
              bits to match. If the mask is missing then a match on all bits
              is assumed.

       vlan_id VID
              Match on vlan tag id.  VID is an unsigned 12bit value in
              decimal format.

       vlan_prio PRIORITY
              Match on vlan tag priority.  PRIORITY is an unsigned 3bit
              value in decimal format.

       vlan_ethtype VLAN_ETH_TYPE
              Match on layer three protocol.  VLAN_ETH_TYPE may be either
              ipv4, ipv6 or an unsigned 16bit value in hexadecimal format.

       ip_proto IP_PROTO
              Match on layer four protocol.  IP_PROTO may be tcp, udp, sctp,
              icmp, icmpv6 or an unsigned 8bit value in hexadecimal format.

       ip_tos MASKED_IP_TOS
              Match on ipv4 TOS or ipv6 traffic-class - eight bits in
              hexadecimal format.  A mask may be optionally provided to
              limit the bits which are matched. A mask is provided by
              following the value with a slash and then the mask. If the
              mask is missing then a match on all bits is assumed.

       ip_ttl MASKED_IP_TTL
              Match on ipv4 TTL or ipv6 hop-limit  - eight bits value in
              decimal or hexadecimal format.  A mask may be optionally
              provided to limit the bits which are matched. Same logic is
              used for the mask as with matching on ip_tos.

       dst_ip PREFIX
       src_ip PREFIX
              Match on source or destination IP address.  PREFIX must be a
              valid IPv4 or IPv6 address, depending on the protocol option
              to tc filter, optionally followed by a slash and the prefix
              length.  If the prefix is missing, tc assumes a full-length
              host match.

       dst_port NUMBER
       src_port NUMBER
              Match on layer 4 protocol source or destination port number.
              Only available for ip_proto values udp, tcp and sctp which
              have to be specified in beforehand.

       tcp_flags MASKED_TCP_FLAGS
              Match on TCP flags represented as 12bit bitfield in in
              hexadecimal format.  A mask may be optionally provided to
              limit the bits which are matched. A mask is provided by
              following the value with a slash and then the mask. If the
              mask is missing then a match on all bits is assumed.

       type MASKED_TYPE
       code MASKED_CODE
              Match on ICMP type or code. A mask may be optionally provided
              to limit the bits of the address which are matched. A mask is
              provided by following the address with a slash and then the
              mask. The mask must be as a number which represents a bitwise
              mask If the mask is missing then a match on all bits is
              assumed.  Only available for ip_proto values icmp and icmpv6
              which have to be specified in beforehand.

       arp_tip IPV4_PREFIX
       arp_sip IPV4_PREFIX
              Match on ARP or RARP sender or target IP address.  IPV4_PREFIX
              must be a valid IPv4 address optionally followed by a slash
              and the prefix length. If the prefix is missing, tc assumes a
              full-length host match.

       arp_op ARP_OP
              Match on ARP or RARP operation.  ARP_OP may be request, reply
              or an integer value 0, 1 or 2.  A mask may be optionally
              provided to limit the bits of the operation which are matched.
              A mask is provided by following the address with a slash and
              then the mask. It may be provided as an unsigned 8 bit value
              representing a bitwise mask. If the mask is missing then a
              match on all bits is assumed.

       arp_sha MASKED_LLADDR
       arp_tha MASKED_LLADDR
              Match on ARP or RARP sender or target MAC address.  A mask may
              be optionally provided to limit the bits of the address which
              are matched. A mask is provided by following the address with
              a slash and then the mask. It may be provided in LLADDR
              format, in which case it is a bitwise mask, or as a number of
              high bits to match. If the mask is missing then a match on all
              bits is assumed.

       enc_key_id NUMBER
       enc_dst_ip PREFIX
       enc_src_ip PREFIX
       enc_dst_port NUMBER
              Match on IP tunnel metadata. Key id NUMBER is a 32 bit tunnel
              key id (e.g. VNI for VXLAN tunnel).  PREFIX must be a valid
              IPv4 or IPv6 address optionally followed by a slash and the
              prefix length. If the prefix is missing, tc assumes a full-
              length host match.  Dst port NUMBER is a 16 bit UDP dst port.

       ip_flags IP_FLAGS
              IP_FLAGS may be either frag or nofrag to match on fragmented
              packets or not respectively.

NOTES         top

       As stated above where applicable, matches of a certain layer
       implicitly depend on the matches of the next lower layer. Precisely,
       layer one and two matches (indev,  dst_mac and src_mac) have no
       dependency, layer three matches (ip_proto, dst_ip, src_ip, arp_tip,
       arp_sip, arp_op, arp_tha, arp_sha and ip_flags) depend on the
       protocol option of tc filter, layer four port matches (dst_port and
       src_port) depend on ip_proto being set to tcp, udp or sctp, and
       finally ICMP matches (code and type) depend on ip_proto being set to
       icmp or icmpv6.

       There can be only used one mask per one prio. If user needs to
       specify different mask, he has to use different prio.

SEE ALSO         top

       tc(8), tc-flow(8)

COLOPHON         top

       This page is part of the iproute2 (utilities for controlling TCP/IP
       networking and traffic) project.  Information about the project can
       be found at 
       ⟨http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2⟩.
       If you have a bug report for this manual page, send it to
       netdev@vger.kernel.org, shemminger@osdl.org.  This page was obtained
       from the project's upstream Git repository 
       ⟨git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git⟩
       on 2017-09-15.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-to-
       date source for the page, or you have corrections or improvements to
       the information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

iproute2                         22 Oct 2015          Flower filter in tc(8)

Pages that refer to this page: tc(8)