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Questions tagged [qos]

Quality of service is the ability to provide different priority to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow.

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QOS Switch or Router

I have IP phones on my network along with computers on the same subnet. Traditionally, I would setup QoS on the router to give priority to the voice traffic over the data traffic. My question is ...
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2answers
53 views

Basic QoS bandwidth for all devices/clients

I have an IP network that has about 500+ clients on the network at any given time. The network uses a Cisco 1941 router as it's gateway, and has 5 different subnets. The network also has 2 DCs, a ...
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14 views

DiffServ QoS on a single host

Can DiffServ also serve in situation where a Linux server's TCP/IP stack may be overwhelmed by heavy traffic (i.e. classifying, marking, and prioritizing with different per-host-behaviors all on the ...
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2answers
42 views

How to isolate group from computers by L3 switch from certain www

There is a broken switch to replace and I need to buy new one. I decide on this model: https://www.linksys.com/us/p/P-LGS528/ Is it possible to isolate 24 computers that are connected to this switch ...
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44 views

Windows 10 GPO QoS by URL not applying

I've created a GPO with QoS settings and I can confirm the PC is domain joined. Name : Test Owner : Group Policy (Machine) NetworkProfile : Domain Precedence : 0 JobObject ...
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29 views

How to split a website's traffic into discrete chunks of bandwidth?

I'm running a website, which has several separate services available for users, like file storage, some sort of current financial data analysis download, and, of course, there's the website itself. ...
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1answer
234 views

Userbased Bandwidth limiting on Cyberoam CR35iNG

I want to limit the bandwidth of each "user" on my Cyberroam firewall. This normally works with QoS, but the problem here is, that my users aren't logged into the firewall, which (afaik) needs to be ...
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283 views

Proper way to limit SMB traffic using QOS policy

So i have a pxe-boot clients that also need to sync from SMB based server occasionally, so i need to somehow limit the incoming SMB bandwidth, otherwise SMB bandwidth would eat up ISCSI bandwidth, ...
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104 views

iptables CLASSIFY rule matches rarely

For purposes of QoS I want to use iptables's CLASSIFY action to specify the class to use for particular connections. Based on various web pages I found, I gathered that the command I need should look ...
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1answer
2k views

How to set up QoS on MikroTik RouterOS?

I'm aware that this is a common question but I've invested two days now to learn this and still could not find a clear explanation... Recently I bought a Miktotik hEX (RouterOS 6, Level 4), used as ...
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2answers
218 views

Why doesn't this “tc filter” rule classify the traffic at intended?

I'm trying to configure some basic traffic classification to limit the maximum ingress bandwidth for every machine in my local network to 3 Mbps. I'm operating the gateway 192.168.2.1, where the ...
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1answer
203 views

tc qdisc with GRE in openwrt

I'm trying to implement traffic control to GRE interface in an openwrt board. For this i followed below steps, Create GRE interface named gre1 in both tunnel end devices. Tested reachability with ...
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1answer
455 views

How to set an general network limit per client + priority for TCP acknowledgements

Following situation: Network A is connected to network B over an slow connection. Different hosts in network A would like to send traffic to hosts in network B. Hosts in network B sending commands to ...
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1answer
26 views

Pause input counters incrementing when imaging a device through USB NIC

We keep running into issues with trying to image devices using a usb-e1000 NIC. It will get the OS on there, but then once that happens the "pause input" counter on the switch begins to increment and ...
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1answer
325 views

shape dropbox on linux router with tc and iptables

Another machine on my LAN is uploading to Dropbox and saturating my internet connection's upload bandwidth. When that happens my pings to 8.8.8.8 take 3000-6000ms. When dropbox is not uploading my ...
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279 views

SonicWall QOS for VOIP

I has a Sonicwall NSA 220, I want to enable QOS on the network. But I want any device to be included so any VOIP call gets priority. I've seen guides on setting up QOS or bandwidth management but for ...
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181 views

D-Link DGS-1510-20 torrent QoS related configurtion

I have two options here. one, I purchased a broken D-Link switch, and two, there is some sort of QOS or firewall related rules that punish my mac pro from connecting to any other device. I have a ...
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26 views

Need to split a high speed ADSL line for several departments

I'll try to keep it simple! We have a new and very fast ADSL line coming in to our office which needs to be split between 4 different departments. Each department will have a certain bandwidth ...
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1answer
555 views

QoS - MySQL Bandwidth Priority on CentOS / rhel

I have a highly loaded server and nginx is consuming all the available bandwidth, and i cannot connect to the mysql server (located on another machine) as i'm getting errors like Lost connection ...
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1answer
314 views

IPTables: drop packets with a certain DCSP value

I can find a lot of examples on how to classify traffic for QoS using TOS and DCSP, but I can't seem to find examples which filter based on the QoS values set. What I want to do is drop all traffic ...
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1answer
632 views

ASA QoS for VoIP traffic

I'm looking to implement QoS for VoIP traffic using DSCP tags: EF & AF31. LLQ for VoIP: ciscoasa(config)# class-map cm_voip ciscoasa(config-cmap)# match dscp ef ciscoasa(config-cmap)# match dscp ...
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1answer
261 views

Bandwidth limit for multiple network destinations with a default (slow) match with Linux TC

I'm playing with Linux traffic control features to restrict KVM VM output bandwidth and got stuck while using filters to match destinations for a fast class and for a (default) slow class for a given ...
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1answer
354 views

Why am I unable to prioritize TCP traffic using ToS fields?

I am trying to prioritize TCP traffic using ToS field in IP header. I am saturating the interface(ethernet) by sending 1GB data through iperf with ToS field set to 0x10 (Minimize-Delay). I then start ...
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1answer
6k views

QoS - How to detect Youtube HTML5 video over port 443?

I'm running Tomato on a small network. It has fairly comprehensive QoS controls, but I'm having trouble getting it to correctly classify Youtube HTML5 videos over port 443. They are being classified ...
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8k views

How to set DSCP values for outgoing traffic from my linux server to check whether QOS is working correctly or not?

I have to validate whether my router's QOS policies are working correctly.I have come up with an approach to tag the packets with DSCP values using IPTABLES. Can anyone confirm whether my approach is ...
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1answer
415 views

Layer 7 QoS Management

I have currently run a medium size SOHO network that can have up to 25-50 users and I am looking to implement a QoS system to better utilize the bandwidth. I currently am using pfSense however, both ...
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1answer
147 views

My tc script just limit outgoing traffic or both outgoing and incoming traffic?

I create this script to limit bandwidth all traffic through card eth1, I can test download speed with wget command but don't know how to test upload speed. Can anyone answer my question or show me how ...
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1answer
52 views

Downloading a file chokes the entire network, can't browse etc

(I had a look at this post here: Downloading a file brings network to a crawl But it doesn't provide any answers for my situation,) We have dedicated enterprise fibre lines with bandwidth at 2MB/s. ...
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2answers
320 views

Is Quality of Service my ISP's responsibility? [closed]

One person on my network does a massive download, not caring too much about how long it takes. Someone else on my network doesn't want his incessant video streaming interrupted. My understanding is ...
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0answers
734 views

WhatsApp call blocking

I'm managing a small network and I'm requested to block WhatsApp calls without blocking its messaging features. As they provide their public IP addresses I thought it'd be straightforward to add some ...
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1answer
3k views

Rate Limit VLAN interface | Cisco Nexus

How to do QoS in cisco nexus for Rate limit. In cisco Routers , we will be creating a policy map and calling it in service_policy in VLAN Interface Ex: Policy-map Policy_2Mbps class class-default ...
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1answer
6k views

Cannot set DSCP on Windows 10 Pro via group policy

Setting 'policy based QoS' on Windows 10 does not apply the DSCP value to outgoing traffic. I want to be able to set the value of DSCP traffic for certain processes. Using gpedit.msc group policy ...
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1answer
423 views

zeroshell qos global bandwidth maximum vs guaranteed

When using Zeroshell QoS what is the difference between the maximum and guaranteed bandwidth when talking about the global bandwidth for the interface? I understand the difference for each of the ...
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102 views

Configure Cisco QoS for VLAN

I have two VLANs (20 and 21) that are accessing the same resource on a switch. Clients on VLAN 20 access this resource only at schedule times, but when they do, they generate lots of traffic as they'...
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1answer
2k views

QOS with iptables and tc with unstable WAN

I have a router/gateway under Linux, I want to add some QoS to reserve bandwidth for a specific flow. This can be done with iptables/netfilter and tc, but all examples start from the fact that you ...
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2answers
2k views

How to set VLAN PCP value?

I am using Intel 82599ES 10-Gigabit adapter on a Linux Machine.I have configured Vlan and the priorities on switch. I have read this http://open-lldp.org/dcb_overview. "When DCB is in operation on a ...
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2answers
602 views

Percentual dynamic bandwidth control with tc

Does anyone know if tc (iproute2) can be used to percentually divide the currently available bandwidth? We're on a GPRS connection on which the available bandwidth changes frequently. What I want to ...
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2answers
39 views

How the Traffic Classes get defined

I often come across in networking related literature the term 'traffic class'. And it looks like it is platform specific, sometimes they talk about 8 traffic classes, sometimes about 64. 1) Is this ...
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1answer
386 views

QoS Traffic Shaping based on packet loss and latency for VPN

I am currently having the following situation: I am using a VPN (OpenVPN) over a rather unstable internet connection. This means the maximum bandwidth varies between 100kbs and 1mbit. Whenever the ...
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3answers
3k views

Windows Server 2012 Policy-Based QoS

I am trying to implement Policy-based QoS on a Windows Server 2012 VM (running on Hyper-V), but for some reason it's not kicking in. The way I added the policy was by going into the Local Group Policy ...
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1answer
266 views

Can we prioritize devices connected to a Router

If a number of devices are connected to a router, can we prioritize them (PC - 1, Mobile - 2, Laptops - 3) by giving their MAC addresses. That way if everybody is working, depending upon their ...
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0answers
332 views

How can I prioritize BITS protocol traffic as Bulk class without dragging interactive web applications down with it?

Windows Update (which uses the Background Intelligent Transfer Service (BITS) protocol) sometimes monopolizes our ADSL uplink. It interferes with interactive applications such as our "in the cloud" ...
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1answer
5k views

Setting ToS/QoS for VoIP on Mikrotik

I have a Mikrotik router which looks like iptables. I need to setup QoS to ensure VoIP phones get top traffic priority. How do I know what ToS to use and how would I get it? I searched and can't seem ...
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1answer
2k views

QoS/traffic-limit on internal ports in OpenVSwitch

I am currently trying to put traffic control on our OpenStack cloud and my questions in one sentence would be: is it possible at all to rate-limit particular port with type internal? The whole story ...
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0answers
591 views

Traffic Control in OpenStack Neutron with either TC or OpenVSwitch

As far as I know, QoS in OpenStack Neutron is still under development and not production-ready (I could be wrong on this point though, shout at me if so...), but we are required to implement traffic ...
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2answers
1k views

Delaying packets with libnetfilter_queue

From my Raspberry Pi configured as an access point, I set the following rules: sudo iptables -I FORWARD -p tcp --sport 25 -j NFQUEUE --queue-num 0 sudo iptables -I FORWARD -p tcp --sport 80 -j ...
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1answer
448 views

QS_SrvMaxConnPerIP whitelist

Is there way to add IP to some kind of whitelist in mod_qos? I have couple of IP which are exceeding QS_SrvMaxConnPerIP = 50 and I don't want to set higher value for other IP's, so I would like to add ...
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1answer
185 views

Internet bandwidth split with HP1810-8G, using “DSCP QoS policies” and VLANs

I have the following scenario: We are a small company (~10 clients) with little resources and we rented out office space to another company(<5 clients). We ordered a 20 Mbit fiber connection which ...
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1answer
266 views

Need help understanding a bandwidth restriction on a Cisco ASA

We have a guest wireless network here and it's bandwidth is limited too 1 Meg per second. I did not configure this and am trying to pick it up. I've found these lines in the cisco config but i'm not ...
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2answers
4k views

Limit bandwidth in cisco router with policy-map doesn't work

I have a problem with my scenario in limiting bandwidth of ubuntu PC in GNS3 with class-map and policy-map. this is my topology in GNS3: -----------cisco-3725-router----------->...