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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4
votes
6answers
707 views

Can QoS settings interfere with wireless printing? [closed]

This may seem like a rudimentary question, but I wasn't sure where else to ask it. I've set up some QoS rules on my router that give the highest priority to all traffic incoming and outgoing to my ...
3
votes
3answers
924 views

LAN QoS for VoIP

Is LAN QoS required for VoIP applications? We have basic network infrastructure: PC (Softphone) -GigEth-> [Switch] -GigEth-> [Router/Firewall] -> Internet (100 Mbps) -> [ITSP] Voice ...
2
votes
1answer
2k views

Cisco QoS - Default Class Allocation

I'm running new IOS 15.4.3(M2) on 2911 and 15.4.3(S3) on ISR4331s. I have the following QoS policy: policy-map WAN-EGRESS-POLICY class CLASSIFY-AF41 bandwidth remaining percent 25 class ...
2
votes
1answer
446 views

QoS in a small network

I have a small engineering network with a Linux router, LAN nodes on the one side of the router, and a WAN link attached to the router. The WAN link is a 16mbit/s wireless channel, while the LAN nodes ...
2
votes
0answers
230 views

How to configure QoS on router? [closed]

I want to prioritize applications which use the internet but in the QoS I find the applications are IGMP SIP H.323 MGCP SNMP DNS DHCP RIP RSTP RTCP RTP, I don't understand which of them is responsible ...
16
votes
3answers
3k views

class-default matches control traffic?

I'm seeing an issue with BFD on a link that's being policed egress where it appears during times where the policer is maxed BFD packets are not getting to the other side. I'm wondering if BFD hellos ...
5
votes
1answer
2k views

QoS, Marking map not marking properly

I have small problem with my edge router. I use QoS, standard CBWFQ template with one LLQ queue. Howewer I have match in access-list of 'ef' class, router probably not mark packet properly. My ...
1
vote
0answers
543 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 ...
5
votes
1answer
277 views

VoIP QoS over DIA/L3VPN physical circuit

This Q. is really confirmation to what I already suspect. On a single physical interface with a carrier that uses two dot1q logical sub interfaces to handle DIA and L3VPN, I suspect any usage of DIA ...
0
votes
1answer
374 views

QOS on Nortel Devices

I need to set up the following on Several Nortel Baystack's (5530/5520): "Assign a priority to DXL VoIP traffic with a DSCP priority level which will be co-exist with the rest of the real-time ...
0
votes
2answers
770 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 ...
9
votes
2answers
2k views

Which QoS classification should be applied to NTP?

Cisco's Enterprise QoS Solution Reference Network Design suggests classifying NTP as network management traffic and marking it as CS2: When addressing the QoS needs of Network Management traffic, ...
2
votes
1answer
109 views

Signals wise, how does dropping an ingress packet due to policing look like?

The context of my question is actually another question which is "Why isn't ingress shaping possible?". So yes, I get the whole "you can't affect packets you haven't received yet" idea, but we can't ...
4
votes
1answer
8k views

Understand the output of “sh policy-map int” in Cisco IOS

I have a following CBWFQ configuration: ! ip access-list extended GRE-traffic-ACL permit ip host 10.10.11.2 host 10.10.11.1 ! ! class-map match-all GRE-traffic match access-group name GRE-traffic-...
2
votes
1answer
2k views

IOS-XR - How to get bandwidth policed on an interface

How can I get in a straight-forward way the bandwidth policed on a certain interface on IOS-XR. In IOS, I execute show policy-map interface Gi1/1.1000 And I get clearly the BW policed on ...
3
votes
1answer
687 views

QoS DSCP AF Class Comparisons

I'm having trouble wrapping my head around DSCP AF Classes and what--all else being equal--gets dropped first. I understand packets are given a Class, 1-4. The higher the Class number, the higher ...
1
vote
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 ...
4
votes
1answer
1k views

QoS between two sites

I have a following topology where Internet service providers for both sites provide 10Mbps connection: There is a GRE tunnel between the sites and I would like to ensure that this tunnel is up even ...
4
votes
1answer
1k views

Rate limiting specific IP adresses on Cisco 2960S and 2960X series

We are looking into rate limiting some specific IP addresses down to 5mbit for various bandwidth reasons. Is is possible to rate limit ingress and egress traffic for specific IP addressees on the ...
7
votes
1answer
4k views

What is benefit of using CBWFQ with fair-queue statement

I mostly seeing configuration of QoS queues based on CBWFQ, witch is tripped off by shaping map. Something like below example. policy-map test class test bandwidth remaining percent 20 random-...
3
votes
2answers
5k 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: The R1 is a cisco 3725 router with c3725-adventerprisek9-mz....
4
votes
2answers
766 views

QoS for 100mb Circuit

The carrier has given me a COS profile of 102: 80/10/10 80% RT for a new 100mb circuit. I've compiled the below as my QoS policy-map and bandwidth configs. interface GigabitEthernet0/0 speed 100 ...
3
votes
1answer
1k views

QoS on tunnel interface

My configuration policy-map Shape_FTP class FTP shape average percent 5 class class-default fair-queue policy-map Shaper class class-default shape average percent 100 service-policy ...
6
votes
2answers
5k views

Limit egress traffic 2960G

This is to support a user who has the requirement of simulating specific speeds for download/upload. We have configured a limit using service-policy that as successfully limiting upload speed (...
5
votes
1answer
860 views

Is it possible to shape and queue on a switched port in a cisco 4506-E?

Background I have a cisco 4506-E with a sup 7L-E running IOS-XE 03.04.03.SG. The switch is connected to a 150 Mbps circuit via 1 Gbps ethernet port. The port is configured as a switched access port....
10
votes
3answers
7k views

How are Weighted Fair Queuing and Weighted Random Early Detection related?

I'm trying to understand how QoS systems work and I'm not sure how exactly would WFQ and WRED interact. At first, I thought that WFQ is a queuing mechanism and that WRED is a congestion avoidance ...
4
votes
1answer
648 views

Why doesn't ISPs reset DSCP at the edge before delivering traffic to customers?

Some ISPs are doing QoS based on traffic type (online streaming), such as Comcast and Cogent. Why don't they reset IP DSCP at the edge so it is not as obvious that they are doing some kind of traffic ...
1
vote
0answers
192 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 (...
1
vote
2answers
554 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 ...
4
votes
0answers
183 views

Shaping on ES20/7606-S

I've recently moved from point-to-point WAN to a point-to-multipoint WAN, unfortunately this has really messed up my brain...in regards to shaping. These circuits are aggregated into three physical ...
8
votes
4answers
550 views

QoS on a dedicated VOIP network

Is there any point in enabling QoS on a dedicated VOIP network that only has VOIP traffic?
1
vote
3answers
565 views

Using QoS for HTTP

By default what DSCP values are used when initiating HTTP traffic? If I wanted to match HTTP traffic to a DSCP value, what should it be?
4
votes
1answer
304 views

protect sensitive traffic if end-to-end QoS is not possible

I have a very typical scenario where I would like to protect IP phones traffic from high RTT, packet delay variation and packet loss on congested links. I fully understand, that QoS would help only in ...
6
votes
2answers
8k views

ISP edge router configuration

I need to configure Cisco 2901 router to route between interconnect block and usable ip block. Circuit is fiber 30Mb/s I got this info from ISP provider: IP space: Interconnect block - 50.204.xxx.80/...
1
vote
0answers
800 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 ...
11
votes
1answer
591 views

enforcing QoS on a “variable” speed link where the negotiation is done by the carriers NTE

In essence we purchase a 80/20 line from the carrier who provides the transport between the customer premises & the local exchange where the carrier terminates into our PE. (Juniper PE) <--> [...
5
votes
1answer
1k views

Juniper destination based CoS

I'm trying to do destination based CoS on Juniper MX basing on destination ASN. I've tried config below. set policy-options as-path BGP-PATH-TO-MARK-COS "65512 .* set policy-options policy-statement ...
29
votes
5answers
28k views

Are CoS and QoS ever interchangeable?

The terms CoS & QoS are often used interchangably, particularly in the SP space when providing "Class of Service profiles" etc as part of Product sets. I'm looking to re-affirm my understanding ...
2
votes
1answer
801 views

QoS not matching traffic

My knowledge of QoS on Cisco is new as of yesterday and I have been trying to get a few different configurations on stack exchange that I found to work but the traffic only ever seems to match the ...
4
votes
1answer
1k views

How do you control WAN Download Bandwith on an ASA?

I have a Cisco ASA and cannot seem to control bandwith from the Internet to the device that well. The ASA supports Shaping, but only on outbound traffic which works great. My question is how to ...
15
votes
7answers
3k views

Quality of Service based on Layer 7 traffic [closed]

How can one perform quality of service based on layer 7 traffic? How would you classify the traffic and actively monitor and respond (dynamically prioritizing traffic)? Are there any solutions which ...
2
votes
1answer
314 views

Cisco: Can (and should) I monitor the processing and memory load of QoS on a router?

In the lab I have some 7206VXRs (and 7301s, but lets concentrate on 7206 for now) which are acting as PE routers. I wish to test some basic QoS policies on these for customer facing VoIP services. On ...
6
votes
1answer
3k views

TX-ring-limit Values

So, I am getting deep into my CCIE study and I just read about the TX-ring-limit interface command. I have used QoS a bit to oversubscribe software buffers to prevent frame loss on switches and ...
7
votes
1answer
7k views

Auto-QOS configuration for Cisco network

I have a network with Cisco switches, Cisco IP Phones and video traffic. I want to add QoS markers to my traffic but I don't want to do it manually. Ideally I want to use Cisco's auto QOS features ...
5
votes
2answers
3k views

Minimum Bandwidth Guarantee 3750-X

I am about to implement a network at a remote office that will also be providing some bandwidth to a sub tenant. We have a 50 Mbps connection terminating to a VLAN on a 3750-X. Each company has an L2 ...
14
votes
4answers
4k views

Enabling MLS QoS on a production 7600

I am looking at a 7609-S with a RSP720-3CXL running 12.2(33)SRE3. I have been asked to help with rate limiting some servers attached to a couple of ports running as L2 ports (switchport mode access), ...
2
votes
1answer
5k views

QoS bandwith calculation

Please explain: I have two routers with QoS on them.. Both WAN-facing interfaces have a bandwidth command with the same value (100000) but the priority queue (also the other reservations) calculates ...
5
votes
1answer
853 views

ASA Traffic Shapping on a burstable circuit

I am connecting to a 100Mbit WAN circuit, that is Burstable to 500Mbit. If I am going to use ASA traffic shaping on this, would I set the shape average to 100Mbit or 500Mbit? My main concern is ...
4
votes
2answers
4k views

cisco 877 router QoS on traffic with a specific destination

Is it possible to throttle traffic coming or going to a specific ip address on a cisco 877 running : C870-ADVIPSERVICESK9-M, 12.4(15)T12, RELEASE SOFTWARE (fc3)? Background: we have a WAN where ...
5
votes
1answer
486 views

Cisco 7604 + RSP720 3CXL + WS-X6704-10GE QOS marking problem

Cisco 7604 + RSP720 3CXL + WS-X6704-10GE, need to understand how much traffic from the client comes to external resources, and how much goes to internal network resources. Mark incoming traffic to ...