Questions tagged [qos]

For questions about Quality Of Service (QoS); all aspects of providing differential service to packets based on TOS, DSCP, or other information.

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625 views

Best method for rate limiting ingress & egress traffic hosts in colocation

What is the best method for the limiting speed of internet access for hosts in our colocation. We have a full rack which will be connected to the internet at 200/200 Mbps. We have our colo equipment ...
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1answer
1k views

QoS (802.1p) for iSCSI Traffic on Cisco Nexus 3048

We're building a new core for our University and one thing that bugs me is the iSCSI network. We already considered Jumbo Frames and Flow Control on the iSCSI ports, but one thing remains for debate, ...
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1answer
1k views

TXOP and Service Period in 802.11e

I want to know what is TXOP and what is service period in 802.11n or 802.11e. Is there any relation or difference between TXOP and SP Thanks, Devaa
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1answer
2k views

VLAN Tags and QoS

I have a bunch of phones that are tagged as VLANID 20 with priority 7. I have the router setup with VLAN Tagging as well to mark VLANID 20. My question in terms of switches. Do the switches need to ...
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1answer
2k views

QoS for site to site VPN

Hey guys maybe you could help me. I have one main site is a clinic where we have a PACS server. So we have 3 more clinics around the country with VPN to send pictures to the server. Now we have 4 ...
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2answers
472 views

QoS with SharePoint Online

Can QoS for a corporate environment be adjusted to prioritize traffic from SharePoint online so that improves user experience when uploading/downloading large files? My network team is telling me no ...
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1answer
98 views

QoS - Add DSCP EF tag with L2 switches?

Here is the topology that I have: Phone => (access port) L2 Switch (trunk) => Router My goal here is to add an EF tag to the packets coming from my phones. Basically, if a packet comes in being in ...
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1answer
82 views

C3PL working order

It is very hard to find information on this topic. I would like to know: If traffic has a hit inside a class-map, is it immediately forwarded or does it get checked against all remaining match ...
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1answer
155 views

Can you vlan tag and assign a priorty (0-7) to SCP traffic

My question is in relation to the file transfer protocol SCP. I have a local time sensitive network built. In time sensitive network you can give priority to traffic by vlan tagging and assigning ...
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1answer
140 views

AQM Broadcast Early WTD COUNTERS

The command "show platform qos queue stats gigabitEthernet X" yields the following output on a Catalyst 3850 switch: ... AQM Broadcast Early WTD COUNTERS(In terms of Bytes) ---------------------------...
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1answer
162 views

Cisco IOS XR policy statistics:

My goal is to see if the interface gets more than 2gbps of traffic, just to see if it's true. So I created a policy map with ACL that matches all, and all actions - violate, conform are set to ...
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1answer
499 views

Egress traffic shaping vs. normal output interface queue

When traffic needs to egress from an interface, it is put to an output queue. When a traffic shaper is shaping egress traffic going out of an interface, it puts the traffic in an output queue also. ...
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1answer
270 views

QoS implementation for VoIP network

We are in VoIP business and running RTP/SIP traffic 80% in our network we have other servers also like www and monitoring and operation, our network is very flat and simple also we have very basic ...
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2answers
572 views

Confirm QoS Cisco 3650

I'm testing some Cisco 3650 switches with Cisco VoIP handsets and using auto qos. Is there a way to see if qos is kicking in and prioritising the voice traffic? Tried looking through the cli and can't ...
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1answer
452 views

TC & Qdisc Rules with 'Leaf' classes [closed]

I'm trying to determine a class which would be used as default for new IP's on my network, here's my current setup: # Delete qdisc rule tc qdisc del dev br-lan root # Add qdisc rule tc qdisc add dev ...
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1answer
837 views

Can I truly multicast over Wifi AP

I have a small dedicated wifi network setup specifically to carry a multicast multimedia package.. no other use (no web or other data on this network, due to the arrangement).. The issue I've found ...
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1answer
842 views

How to use a layer 3 switch for QOS between gateway and hosts?

In the following scenario, is it possible to prioritize VOIP/RTP from x.x.x.51 through the gateway with a Cisco switch, and how? I need to prevent x.x.x.50 from saturating the WAN connection. ...
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1answer
455 views

How packets get differentiated to prioritize?

On the Internet, there are many types of packets: VoIP, Audio, Video. As QoS is used to prioritize packets based on DSCP or VLAN priority. who set these bits for each and every packet. Like Audio gets ...
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1answer
147 views

Throttling Internet speed to device or vlan

I have a Netgear FVS318N Firewall/Router, GS752TP Switch, and a Netgear WNAP210 AP. After a bit of searching, I have identified a machine that is using the lion's share of bandwidth (youtube). Is it ...
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1answer
684 views

DSCP trust over IPSec GRE

I have 2 branch offices connecting together via a metro-e and I'm running an ipsec gre tunnel between the 2 sites. routerA=branch1 routerB=branch2 WAN-------routerA----------|metroe|------------...
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0answers
63 views

HTTPS QOS and policing

In our office, everything runs on HTTPS. We have softphones and web-based clients which are high priority. We also have Google search, maps and other low priority websites that should work on best-...
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0answers
19 views

Can QoS provide a benefit after data has gone through other unmanaged switches first? [duplicate]

Details about the devices We have a 24 port NETGEAR managed POE switch that has QoS capabilities. We have the following unmanaged switches, 24 port Cisco POE, 48 port Cisco, 48 port NETGEAR, and 24 ...
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0answers
58 views

traffic of AF41 marking under interface

I have used port-queue commands most of the time to check traffic status under BE, EF, AF4. But I haven't found command to check for AF41 to AF42 on Huawei VRP or cisco IOS. How can check traffic of ...
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0answers
196 views

Simple Token Bucket - Policing - Terms - CIR, CBS

I have gone through token bucket algorithm. However, I am struggling to apply this knowledge into the real devices like CISCO, etc. So, for QoS policing, interface meter. I am trying to understand ...
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0answers
51 views

QOS - the need for it and verifying it

Just some straightforward questions, hope gurus here can shed some light 1) show int - output queue -> this is the hardware queue (tx-ring) or this is the software queue ? if I see drop, this means ...
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0answers
34 views

Policy Map issue on c6848x 15.2(02)SY

I have a problem creating traffic shaping on c6848x. I need to set shaping on output interface to limit and shape traffic to 100 MBs. So far I did this: class-map match-any 100MB-OUT match any ...
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2answers
1k views

Can NOT match ACL in an output policy-map

this it my config , access-list 2000 permit ip 8.8.8.0 0.0.0.255 any access-list 2000 permit ip 8.34.208.0 0.0.15.255 any access-list 2000 permit ip 8.35.192.0 0.0.15.255 any access-list 2000 permit ...
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0answers
40 views

Low quality of realtime audio/video calls. Route such traffic through a separate WAN connection? [closed]

We have problems with the quality of audio/video calls in our office. We get much better quality using mobile LTE connection than our fiber link. LTE connection always goes HD, but the fiber ...
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0answers
162 views

3com 5500G migration to force10 s4810

I am doing this migration with these 3com switches.So our client told me that the configuration was made for a network administrator who was fired some years ago. So I dont have any kind of ...
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0answers
50 views

Is there a way to prioritize/manage WIFI traffic (in the WIFI realm)?

So I have a WIFI/client application which has some specific issues, in that several devices need to absolute priority. Fortunately, i'm able to prevent MOST devices from joining the network, but I ...
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0answers
1k views

Configuring QoS on Cisco ASA 5525-X

I'm trying to configure QoS on a Cisco 5525-X ASA and feel like I'm beginning to get a handle on it but the queue-limit and tx-ring-limit calculations are losing me. What I've got right now is a ...
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2answers
146 views

Testing Bandwidth in preparation of tele conferencing

I am working for a company that is installing a video conferencing e-learning web application that is using a red5 media server. The client is complaining that the performance is choppy/slow, and my ...
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0answers
527 views

Verify my cisco QoS script

I've written the below config for the following network topology: 6509 switch acting as collapsed core for data access switches, voice access switches and wifi access switches. The 6509 then connects ...
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0answers
183 views

Is it possible to calculate the path loss in an UMTS system if the current HNB CPICH power and RSCP values are known?

Please let me further elaborate on my question: Let's say we have an HNB with 2 Watts of power allocated for the common pilot channel. This would mean that the radiated signal power at the HNB site (...
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0answers
785 views

Juniper SRX MPLS Egress Prioritization

I can't for the life of me to get any egress queue prioritization to happen on an SRX. I have a single label switched path out of the SRX, and a couple of ethernet-ccc's. One ccc is entirely ...
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3answers
56 views

High Throughput on BGP Multihomed Network

I've One site connected to my server location via BGP over MPLS and at my server location 2 edge routers cater these WAN links, and are further connected to Servers via switches. Now, Is it possible ...
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1answer
53 views

qos inside vpn, possible or not ? I read yes and no

I am wondering if possible to do QOS (or similar action) inside vpn tunnel to a cloud server. the goal is to reserved bandwith for voip traffic. I read that you can with GRE and other people said, ...
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1answer
51 views

Cisco qos, service-policy on output interface on 1100 ISR seems ignored

I am trying to configure QoS for a specialty purpose application, and it is the first time I have done QoS. This is on an 1100 ISR with IOS XE 16.09.03. The device is a set of 4 that establish a mesh ...
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2answers
53 views

traffic shaping

I need some clarifying on that issue (little bit rusty on that) Assuming I have some limitation on the BW of 1Mb. What will happen then there is incoming traffic of 1.5Mb for 10 sec - some of the ...
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1answer
56 views

Latency in Network [closed]

My company uses trading application where latency is utmost important. I have few ideas but really dont know how to implement. Like I want to know 1) How can I Prioritize applications by 802.1q tag. ...
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1answer
632 views

How to test QoS function in router

Assumer I have a new router device of Cisco with 2 ports ethernet 10/100/1000. As everybody know that QoS based on DSCP field in IPv4 header to have difference policy for difference class. I start ...
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2answers
708 views

QoS between multiple VLANs [closed]

I am currently using PFsense as my firewall and was happy until I introduced VLAN in my network. I need to be able to apply QoS over multiple VLANs: I have a 10/2 mbit line and want following ...
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1answer
51 views

What kind of QoS do I need? [closed]

I have a small office. There are ~5 PCs connected via cable. There is 1 PC via WiFi, 3 VoIP phones and a bunch of cellphones connected via WiFi. There is a Gigalan switch and a internet connection ...
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1answer
832 views

Bandwidth regulation without QoS and VLAN [closed]

Does anyone know any possibility to do Bandwidth reservation or something equal to it. Mainly to give VoIP and IPTV Bandwidth before the Internet when there is no possibility to use QoS and VLAN. It ...
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2answers
84 views

What exactly happens in the queues when a congested network applies back pressure ? [closed]

During Congestion in a network switch HW ,for examplewhen a shaping rate to the interface that imposes a speed limit lower than the maximum interface line speed . The concept of back pressure is ...
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11 views

What is the difference between meters and queues in Openflow?

I'm new to OpenFlow and have just started studying Software Defined Networking. I have found a multiple websites mentioning that queues and meters are complementary to each other, and that they should ...
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36 views

Applying DSCP to an interface

I'm trying to apply DSCP (AF41) to an interface eth-trunk (if it matters) - [~HUAWEI] diffserv domain QoS \ creating diffserv domain named QoS [~HUAWEI] dsdomain QoS] ip-dscp-outbound af4 ...
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39 views

Packet scheduling in LTE/5G core network components

Scheduling algorithms must be used in radio side of these technologies in order to map radio sources to incoming/outgoing data packets and satisfy quality of service requirements such as latency and ...
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68 views

I'm unable to see packet drops after configuration of QoS policy

I aim to send iperf traffic from Endpoint1(Client) to Endpoint2 (Server) with the following SR path = {R1, R2, R3, R4, R3, R2, R1, R2, and R3}. First of all, the traffic generated by iperf from ...
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53 views

Cisco Catalyst QoS queuing model

How Cisco Hardware queuing model (like 1p7q4t for Cat6800) are related to traffic classes (class-map) ? How assign the X traffic class to Y hardware queue ? Also, if only 6 classes are configured, ...