Quality Of Service, all aspects of providing differential service to packets based on TOS, DSCP, or other information
3
votes
1answer
82 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 ...
2
votes
1answer
61 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 ...
5
votes
1answer
109 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 ...
1
vote
1answer
106 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
3answers
115 views
QoS on a dedicated VOIP network
Is there any point in enabling QoS on a dedicated VOIP network that only has VOIP traffic?
5
votes
1answer
193 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
3answers
196 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 WQF is a queuing mechanism and that WRED is a congestion avoidance ...
4
votes
2answers
187 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 ...
1
vote
1answer
215 views
How to test Wi-Fi Multimedia (WMM) QoS management with LANforge?
I would like to test the Wi-Fi Multimedia (WMM) feature of an access point AP.
How can I test it using Candela Technologies LANforge-WiFIRE WiFi traffic generator?
Some thoughts after reading the ...
8
votes
1answer
465 views
QoS between two VLANs with Cisco 881 Router (IOS)
I'm hoping to get some advice regarding the best practice to delegate a limited Internet connection between two VLANs. In my case one VLAN is for an office network, and the other is for guests. What ...
1
vote
1answer
426 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 ...
2
votes
2answers
253 views
Distinguishing google drive from other https traffic
I have a LAN stuck at the end of a plusnet DSL connection with a 443K upstream link. Unlike a previous IP, when the link is saturated by a google drive upload or similar everything else becomes ...
11
votes
1answer
313 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 ...
3
votes
2answers
394 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 ...
2
votes
0answers
46 views
NDE for QoS Flows on SUP720-3C?
I've setup per user Layer 2 policing on a pair of Cat6k with SUP720-3C to ratelimit wireless guest users. This is working fine and the flow table is populated as expected (with L2 qos flows).
Now my ...
4
votes
1answer
145 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 ...
4
votes
1answer
1k views
How can I reasonably verify my QoS configuration is working?
Context
I've deployed a standard QoS config to a customer site running a Cisco 891 router with IOS 15.1(4)M4. The WAN link is a single ADSL2+ link (24/1Mbps) connected to FE8.
I've previously tested ...
10
votes
1answer
219 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) <--> ...
8
votes
2answers
528 views
QoS woes - managed IP VPN
(First of all, I'm sorry for this wall of text. I don't know how to make it any shorter without losing important information. I originally wanted to use the chat room for this, like we do on ...
3
votes
1answer
516 views
QoS voice traffic on WAN of Cisco 1841
I have the following lab topology and I am using the below configuration on the 1841. What I want to achieve here is reserve 1000Kbps of bandwidth for traffic between the voice VLAN and the remote ...
4
votes
1answer
231 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 ...
8
votes
2answers
1k views
How do you throttle Dropbox Traffic?
It appears that Dropbox uses Amazon AWS for it's storage, so I am not able to just block or trottle traffic to dropbox.com
Since there are a lot of web services that rely on AmazonAWS, I cannot just ...
2
votes
2answers
113 views
QOS Layer 2 Link
I have two NET APP Controllers in two different Data Centers. The Data Centers are connected with a 1 Gig Layer 2 connection. Both NET App controllers are IPed within the same broadcast domain. The ...
7
votes
1answer
132 views
Globally disable QoS on Cisco 3750 in production
I suspect some issues with faulty QoS settings on a 3750 stack running in a 24x7 environment. The 3750 mainly routes between vlans on a lan segment. Since it is a lan device (not terminating any wan ...
7
votes
1answer
215 views
Ethernet switch capable of H-QoS at the 802.1q level
I have the following type of links at the edge of my ISP cloud:
+-----------------------+
...
4
votes
2answers
455 views
How do I tag traffic with a DSCP value on an ASA?
I have a SIP Server that does not put a DSCP code on it's traffic. This server is behind an ASA, and I want to prioritize its traffic passing through an ASA from the private to public network.
I am ...
6
votes
1answer
113 views
How is probabilistic marking performed with Random Early Detection?
I am currently studying for my Computer Networks exam.
I cannot wrap my head around the following.
When the current Average Queue Length is in between a min_threshold and a max_threshold, the Random ...
5
votes
1answer
95 views
Why there is a maximum of 4096 queues in WFQ?
In QoS there is a variety of Queuing methods and one of them is WFQ, which organizes the flows in different queues where each queue has a weight that determines which flow will go first.
Now for ...
5
votes
2answers
179 views
Metro Ethernet settings on Customer devices
I am about to connect three remote sites to the main office by means of an metro ethernet provided by a service provider. The sites are connected by means of l3 and running OSPF on the connecting ...
7
votes
3answers
596 views
Traffic Policing
I know traffic policing isn't something that you normally find in a LAN environment, and I wish I wouldn't be finding it in mine. That being said... I have no choice.
The device is a 3750X. The ...
8
votes
3answers
177 views
How does one specify certain IPs or MAC addresses for NBAR policy enforcement?
In an office environment, if I wanted to block youtube using a Cisco ISR router, I would set up the following with NBAR:
class-map match-all YOUTUBE
match protocol http host "*youtube.com*"
!
...
-1
votes
1answer
308 views
Accurate approch for LAN Speed Test [closed]
Respected one,
Please guide me what would be the best approach to check the Network Speed(Uploading & Downloading Speed) within a LAN network (Which also have connectivity to Internet).
4
votes
3answers
409 views
How to throttle speed for a particular computer with high activity?
We're in an office environment of about 50 people. A few departments send emails with large attachments extensively and doing so clogs up the WAN connection (10Mbps).
I'm upgrading the networking ...
5
votes
2answers
188 views
DSCP trust boundary
I have performed some analysis and noticed that traffic coming in from the Internet contains a myriad of DSCP values. This traffic competes for voice and video resources on the internal network.
How ...
14
votes
8answers
1k views
How to generate traffic for lab scenarios
I'd like to start exploring QoS, and lower level optimizations for things like broadcasts/multicasts within my home lab. I've looked around for ways to generate traffic to and from a box, but haven't ...
5
votes
3answers
184 views
QoS at the edge of branch
I have a question about QoS design in branch. The main place to deploy qos in branch - edge between edge router and ISP. At this edge we have voice traffic to SIP provider, copr. external email and ...
11
votes
4answers
554 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), ...
3
votes
6answers
183 views
Can QoS settings interfere with wireless printing?
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 ...
7
votes
1answer
796 views
What is the 5 level QoS model (through config example)?
I have heard people stating that their network
"operates a 5 level (or layer) QoS model"
Sometimes they also mention a 7 level QoS model. Can anyone provide me with a Cisco IOS config example ...
7
votes
2answers
77 views
TDMoE and QoS considerations
As mentioned in the previous question I am looking at sending voice communications over a Metro Ethernet connection shared also by data connections. In addition to the previous question I have this ...
5
votes
2answers
641 views
QoS on HP Procurve 2520 and 3800 switches
Do Procurve switches remark cos/dscp values between switches (trust boundaries) as Cisco switches do?
I'm wondering if there is an equivalent to "mls qos trust (cos/dscp)" in the HP realm.
10
votes
2answers
1k views
How can I verify QoS DSCP marking on a Cisco Catalyst 4500E?
Good afternoon,
I've got a shiny new 4500E running 15.0(1r)SG7 that is set to replace an ailing 3750E.
It is running ipbase for now.
On the 3750 I was able to check out the incoming DSCP/CoS values ...
16
votes
5answers
540 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 ...
11
votes
6answers
1k views
Weather map and monitoring for network usage
What tools are able to provide an almost real time weather map of usage and average traffic per timeframe going over the different links?
What are some ways or solutions to actively monitor my ...
13
votes
7answers
654 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 ...
