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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.

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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stress testing a QOS switch

I need to test a network Switch that has QOS capabilities. I need to simulate a large network (preferably up to or exceeding 100 devices), and I need to do it as a live test. My requirements are: • create around 100, if not more, TCP flows from a…
flexavegan
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RSVP on Cisco, Understanding and basic configuration

I'm looking for some help about a basic configuration and use of RSVP QoS into a Cisco router (2901 series). Since I have no luck using RSVP into my main network, I have tried to make it work in a basic configuration but with no positive result so…
grattmandu03
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Linux Traffic Shaping with "tc": QoS filter for requests directly on the host not applied?

I'm trying to reduce the interface thoughput to debug my application on slower network speed. I've remembered a tc statement to do this on a interface which was working in the past. I used it on a dedicated (remote) development machine. This is the…
try-catch-finally
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Layer 2 QoS for Windows Server 2012 service

We have an unmanaged Cisco SG102-24 switch which supports layer 2 QoS (IEEE 802.1p). Because we're installing VoIP at our office, we would like to prioritize VoIP packets from our voice server which is running Windows Server 2012 R2. How can we…
android
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Throttling individual samba connections

I have a CentOS server set up with Samba on a gigabit LAN connection. I've found that if I copy large amounts of data from the Samba server to a client machine that also has a gigabit connection, that one file copy process completely eats up…
Matthew
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Why This TC Script Not Working

Our application has three classes of traffic, and every type of traffic involves three ports. We want to limit the traffic by port number via TC, so I made a simple TC script to have the test, however the script doesnt work as I expected. Below are…
Steve Peng
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What do these two QOS script statements mean

I am studying the QOS utility of Linux -- TC -- recently, and today I encountered below two statments from a bandwidth-limit script on Linux: tc filter add dev eth0 parent 1: prio 1 protocol ip u32 \ match ip tos 0x68 0xff match ip…
Steve Peng
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What kernel module to compile for getting QOS service on Linux

We are developing on Linux system whose kernel had been compiled without QOS service years ago. Currently we want the QOS service back and plan to compile only the QOS-related kernel modules and install them into the system kernel. But we don't…
Steve Peng
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Bandwidth Reservation vs QOS

what is the difference between bandwidth reservation and QOS? for example, if I reserve 30Mbps to VOIP traffic on a router, is that the same of QOS? or does QOS work in a different way?
user175416
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Using Linux just for doing QOS on an existing network

I have a proprietary web filtering device which also functions as a NAT router. It's one interface has a public IP and another interface has a private IP. All local clients connect to the interface with the private IP and they get IP address via…
nixnotwin
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QoS - What is the 6. Bit in the DS-Field?

RFC 2474 uses the ToS byte for Differentiated Services Code Point: 0 1 2 3 4 5 6 7 +---+---+---+---+---+---+---+---+ | DSCP field |CU/ECN | +---+---+---+---+---+---+---+---+ Further, the DSCP field has more…
RnBandCrunk
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How to view qos statistics on cisco 6500?

We have a 6504 switch with supervisor 720 10GE as core/distribution. We do marking at access level on 2960. I see drops on core. So I need to know about something like mls qos int stat, but on 6500. Please help.
user141238
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Is it possible to limit traffic received by a xen domU?

I have ubuntu 12.04 and openvswitch and xen installed, and I know that limit traffic sent by xen domU can be using rate limit by xen netback or "ingress_policing" by openvswitch. but because downloading some thing in the xen domUs may consume all of…
frostyplanet
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Cisco ASA 5540 multi-WAN and QoS setup

What is the best way to configure the following on a Cisco ASA 5540? I have 2 WAN lines, I need mail (tcp 25) on the one and all other traffic on the second WAN line. On the second WAN line I need to prioritize traffic for some external…
Shawn Gradwell
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MPLS: INBOUND vs OUTBOUND Labels

In The MPLS LSR if I have 4 INPUT ports with 4 labels label:port 11 : 1 22 : 2 33 : 3 44 : 4 and ONE output port How many labels can exit through the output port/interface? or do they get aggregated into one label?
Reid
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