Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [tc]

TC is the linux tool used to manipulate the traffic control functionality in the kernel.

TC is the linux tool used to manipulate the traffic control functionality in the kernel.

241 questions
1
vote
2 answers

How much traffic a linux-based shaper would be able to chew

I have a linux based traffic shaper (iptables + tc htb policy). It works in bridge mode. Shapes traffic based on IPs and ports (there are about 100 rules in the "mangle" chain of iptables). Right now its throughoutput is about 100 mb/s (I don't…
facha
  • 1,368
  • 2
  • 18
  • 26
1
vote
1 answer

Using cgroup & tc in linux seems to NOT apply exactly my rates: 10x discrepancy

I'm using the "standard" way that I found everywhere on the internet (including ServerFault) to try and limit the bandwidth of a process, using cgroups & tc. What I see in practice is that the limits I set through tc will be about 10 times more in…
Gui13
  • 43
  • 1
  • 9
1
vote
0 answers

How to limit Wireguard bandwidth

I have Debian 11 server with installed Wireguard with wg0 interface and 3 peers. Server bandwidth speed is 100 MBit and traffic is around 500 GB per month. What I need is: these 3 peers can use 100 GB/month traffic at top speed (meaning no bandwidth…
Space
  • 11
  • 1
1
vote
1 answer

Linux Traffic Control: What is the difference between qdisc multiq and mq?

By default Linux creates a qdisc mq. I am configuring it on my computer to change some parameters but I found that there are 2 qdiscs that seem to be the same: mq and multiq. I can't find any documentation on what the differences are between them to…
Juan Simón
  • 111
  • 3
1
vote
1 answer

How to apply `fq_codel` to balance traffic in multiple VLAN connections?

I have an Ubuntu server connected to multiple VLAN networks over a single physical 1 Gbps network port. The network connections are configured via /etc/network/interfaces like this: auto lo iface lo inet loopback auto eno1.395 iface eno1.395 inet…
Mikko Rantalainen
  • 1,030
  • 14
  • 30
1
vote
0 answers

tc prio qdisc example not working

I'm used tc to priority send packets to port 9999. tc qdisc add dev eno1 root handle 1: prio priomap 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 tc filter add dev eno1 protocol ip parent 1: prio 0 u32 match ip dport 9999 0xffff flowid 1:1 use ethtool to limit…
hello
  • 11
  • 1
1
vote
0 answers

How to see contents of output queue of NIC in Linux and introspect frame delay

I am experimenting with tc tool to implement prioritization of specific data coming from my computer and would like to see exatly how the frames are scheduled and how much time they spend in the qdisc queue before the transmission (before being…
Hadarelv
  • 13
  • 2
1
vote
1 answer

WireGuard: Limiting download & upload bandwidth

I'm trying to limit download and upload speed of each wireguard peer to 512kbit. The problem is that my following commands, only limits download bandwidth of peer and doesn't limit upload bandwidth. Any help would be appreciated. tc rules for…
user3411911
  • 11
  • 2
  • 5
1
vote
0 answers

Dynamic bandwidth in Tc (Bandwidth Changes over time)

Basically I wanted to change the bandwidth after every 10 seconds using tc. So how to do that thing in tc. This is my script. !/bin/bash # # tc uses the following units when passed as a parameter. # kbps: Kilobytes per second # mbps: Megabytes…
Abhishek Chapla
  • 11
  • 1
1
vote
0 answers

Why the CLASSIFY action isn't applied by the iptables?

Why might the following simple iptables rule not work: iptables -t mangle -A POSTROUTING -p tcp --dport 1194 -j CLASSIFY --set-class 1:10 ? I'm trying to prioritize outgoing traffic to VPN. I am connected to the internet via a router with the…
Serge Roussak
  • 111
  • 2
1
vote
0 answers

How can I limit incoming/outgoing connection speeds based off IPs?

I want to limit the speed each IP can download/upload files for every application on my server to 1Mb/s Example IP 192.168.0.1 is downloading at sustained 900Kb/s through FTP server if the IP then attempts to download files through our webserver it…
Toodarday
  • 215
  • 1
  • 2
  • 8
1
vote
1 answer

Does tc guarantee network bandwidth for a process or run as best effort?

I have a tc rule as follows: qdisc tbf 1: dev bwp93ce2ea9d929 root refcnt 2 rate 100Mbit burst 100Kb lat 25.0ms Is this rule guarantee network bandwidth to be 100Mbps or it'll throttle if not enough network bandwidth is available at the moment? If…
Michel Gokan Khan
  • 183
  • 2
  • 14
1
vote
1 answer

Reduce the network traffic priority in Linux

I want to reduce the priority of specific network traffic using tc in particular tc-u32 in my Linux server. In other words all other traffic must have higher priority than traffic with specified IP-proto. I'm trying to apply this tc filter rule to…
red0ct
  • 394
  • 3
  • 11
1
vote
0 answers

limit bandwidth per IP Linux ubuntu openVPN

I am a newmember in config ubuntu server and I installed an OpenVPN on a ubuntu 18.04 linux server, now I want to limit the server bandwidth with 2Mbit per IP for users that connect to the OpenVPN, and I should say I have just 1 ovpn client file and…
mohsen
  • 113
  • 1
  • 6
0
votes
0 answers

How configurable is the Linux Network Emulator in regards to queue disciplines?

Based on this wiki article https://wiki.archlinux.org/index.php/Advanced_traffic_control It appears that I can configure the Linux traffic controller, which seems to be a subset of the Linux Network Emulator, to change its queuing disciplines. So…
John Mancini
  • 1
1 2 3
…
16 17