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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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1answer
83 views

Cisco Unity Connection guest, ESXi host, IP phones, vlan, subnet, ip addresses, qos

I have setup: VLAN 1 and subnet 192.168.1.0/24 for data VLAN 100 and subnet 192.168.100.0/24 for voice IP phones get their IP via DHCP on the subnet 192.168.100.0/24 all other IP devices get their IP ...
0
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1answer
36 views

CISCO Tc Bc and CIR units

Are the units in these formulas correct? Tc (seconds) = Bc (bits) / CIR (bits per second) Tc (milliseconds) = Tc (seconds) * 1000 Bc (bits) = Tc (seconds) * CIR (bits per second) CIR (bits per second)...
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1answer
41 views

How color is encoded in the DS field/ToS IPv4 - QoS?

The RFC 2698 says - "The color is coded in the DS field [RFC2474] of the packet in a PHB specific manner". I am trying to understand how color is encoded like in the IPv4 header - in the TOS field ...
2
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0answers
173 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 ...
2
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0answers
94 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 rate-limit wireless guest users. This is working fine and the flow table is populated as expected (with L2 QoS flows). Now my ...
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0answers
43 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
140 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
46 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
29 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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0answers
155 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
47 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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0answers
503 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
179 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
760 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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0answers
14 views

Why in DRR (Deficit Round Robin) is the Deficit Counter set to 0 when the list of packets for a flow gets empty?

I'm studying DRR scheduling algorithm (https://www2.cs.duke.edu/courses/cps214/spring09/papers/drr.pdf) but I don't understand why the deficit counter is always reset to 0 when the list of a flow get ...
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0answers
27 views

What is the difference between Custom Queuing and Weighted Fair Queuing?

I understand that both mechanisms send traffic in a round-robin fashion, and the traffic is sent proportionally to their weight based on the ToS of the traffic. However, I don't understand the ...
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0answers
88 views

Cisco QoS Queuing models

I would have a question about the Cisco Queuing models. For example, when we speak about 1p7q3t, or 2p6q3t, or others models, does it from hardware or software considerations ? If it's hardware, if ...