The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
u32 – universal 32bit traffic control filter Synopsis tc filter … [ handle HANDLE ] u32 OPTION_LIST [ offset OFFSET ] [ hashkey HASHKEY ] [ classid CLASSID ] [ divisor uint_value ] [ order u32_value ] [ ht HANDLE ] [ sample SELECTOR [ divisor uint_value ] ] [ link HANDLE ] [ indev…
tunnel_key – Tunnel metadata manipulation Synopsis tc … action tunnel_key { unset | SET } SET := set src_ip ADDRESS dst_ip ADDRESS id KEY_ID dst_port UDP_PORT tos TOS ttl TTL [ csum | nocsum ] Description The tunnel_key action combined with a shared IP tunnel device, allows to perform IP tunnel en- or decapsulation on…
tcindex – traffic control index filter Synopsis tc filter … tcindex [ hash SIZE ] [ mask MASK ] [ shift SHIFT ] [ pass_on | fall_through ] [ classid CLASSID ] [ action ACTION_SPEC ] Description This filter allows to match packets based on their tcindex field value, i.e. the combination of the DSCP…
tbf – Token Bucket Filter Synopsis tc qdisc … tbf rate rate burst bytes/cell ( latency ms | limit bytes ) [ mpu bytes [ peakrate rate mtu bytes/cell ] ] burst is also known as buffer and maxburst. mtu is also known as minburst. Description The Token Bucket Filter is a classful queueing discipline…
TAPRIO – Time Aware Priority Shaper Synopsis tc qdisc … dev dev parent classid [ handle major: ] taprio num_tc tcs map P0 P1 P2 … queues count1 [at] offset1 count2 [at] offset2 … base-time base-time clockid clockid sched-entry <command 1> <gate mask 1> <interval 1> sched-entry <command 2> <gate mask…
tc-stab – Generic size table manipulations Synopsis tc qdisc add … stab [ mtu BYTES ] [ tsize SLOTS ] [ mpu BYTES ] [ overhead BYTES ] [ linklayer { adsl | atm | ethernet } ] … Options For the description of BYTES – please refer to the UNITS section of tc(8). mtu…
skbprio – SKB Priority Queue Synopsis tc qdisc … add skbprio [ limit packets ] Description SKB Priority Queue is a queueing discipline intended to prioritize the most important packets during a denial-of-service ( DoS ) attack. The priority of a packet is given by skb->priority , where a higher value places the packet closer…
skbmod – user-friendly packet editor action Synopsis tc … action skbmod { set SETTABLE | swap SWAPPABLE | ecn } [ CONTROL ] [ index INDEX ] SETTABLE := [ dmac DMAC ] [ smac SMAC ] [ etype ETYPE ] SWAPPABLE := mac CONTROL := { reclassify | pipe | drop | shot |…
skbedit – SKB editing action Synopsis tc … action skbedit [ queue_mapping QUEUE_MAPPING ] [ priority PRIORITY ] [ mark MARK[/MASK] ] [ ptype PTYPE ] [ inheritdsfield ] Description The skbedit action allows to change a packet’s associated meta data. It complements the pedit action, which in turn allows to change parts of the…
simple – basic example action Synopsis tc … action simple [ sdata STRING ] [ index INDEX ] [ CONTROL ] CONTROL := { reclassify | pipe | drop | continue | ok } Description This is a pedagogical example rather than an actually useful action. Upon every access, it prints the given STRING which…
sfq – Stochastic Fairness Queueing Synopsis tc qdisc … [ divisor hashtablesize ] [ limit packets ] [ perturb seconds ] [ quantum bytes ] [ flows number ] [ depth number ] [ headdrop ] [ redflowlimit bytes ] [ min bytes ] [ max bytes ] [ avpkt bytes ] [ burst packets…
sfb – Stochastic Fair Blue Synopsis tc qdisc … blue rehash milliseconds db milliseconds limit packets max packets target packets increment float decrement float penalty_rate packets per second penalty_burst packets Description Stochastic Fair Blue is a classless qdisc to manage congestion based on packet loss and link utilization history while trying to prevent non-responsive flows…
sample – packet sampling tc action Synopsis tc … action sample rate RATE group GROUP [ trunc SIZE ] [ index INDEX ] tc … action sample index INDEX Description The sample action allows sampling packets matching classifier. The packets are chosen randomly according to the rate parameter, and are sampled using the psample generic…
route – route traffic control filter Synopsis tc filter … route [ from REALM | fromif TAG ] [ to REALM ] [ classid CLASSID ] [ action ACTION_SPEC ] Description Match packets based on routing table entries. This filter centers around the possibility to assign a realm to routing table entries. For any packet…
red – Random Early Detection Synopsis tc qdisc … red limit bytes [ min bytes ] [ max bytes ] avpkt bytes [ burst packets ] [ ecn ] [ harddrop ] [ nodrop ] [ bandwidth rate ] [ probability chance ] [ adaptive ] [ qevent early_drop block index ] [ qevent mark…
PRIO – Priority qdisc Synopsis tc qdisc … dev dev ( parent classid | root) [ handle major: ] prio [ bands bands ] [ priomap band band band… ] [ estimator interval timeconstant ] Description The PRIO qdisc is a simple classful queueing discipline that contains an arbitrary number of classes of differing priority….
police – policing action Synopsis tc … action police [ rate RATE burst BYTES[/BYTES] ] [ pkts_rate RATE pkts_burst PACKETS] [ mtu BYTES[/BYTES] ] [ peakrate RATE ] [ overhead BYTES ] [ linklayer TYPE ] [ CONTROL ] tc … filter … [ estimator SAMPLE AVERAGE ] action police avrate RATE [ CONTROL ]…
PIE – Proportional Integral controller-Enhanced AQM algorithm Synopsis tc qdisc … pie [ limit PACKETS ] [ target TIME ] [ tupdate TIME ] [ alpha int ] [ beta int ] [ ecn | noecn ] [ bytemode | nobytemode ] [ dq_rate_estimator | no_dq_rate_estimator ] Description Proportional Integral controller-Enhanced (PIE) is a control…
pfifo_fast – three-band first in, first out queue Description pfifo_fast is the default qdisc of each interface. Whenever an interface is created, the pfifo_fast qdisc is automatically used as a queue. If another qdisc is attached, it preempts the default pfifo_fast, which automatically returns to function when an existing qdisc is detached. In this sense…
pfifo – Packet limited First In, First Out queue bfifo – Byte limited First In, First Out queue Synopsis tc qdisc … add pfifo [ limit packets ] tc qdisc … add bfifo [ limit bytes ] Description The pfifo and bfifo qdiscs are unadorned First In, First Out queues. They are the simplest queues…