DSCP to CoS mapping: Avaya traffic

It appears that Avaya marks its voice traffic as follows:
L2 signaling cos 6 L3 signaling dscp 34
L2 audio cod 6 L3 audio dscp 46
Has anyone interacted with theses settings and what are the right mappings for 6500 series Modules?
I am about to use the following:
#mls qos map dscp-cos 34 46 to 6
#mls qos map dscp-cos 48 to 5 "move IP control to cos 5)
#mls qos map cos-dscp 0 8 16 24 32 46 48 56 leave cos to dscp unchanged.
Finally use: #mls qos thrust dscp on input interfaces.
Can anyone clarify?
Thanks.

The 6608 and 6624 internal port is treated as trust-cos to the Catalyst 6000. So the default COS-to-DSCP mapping of the cards will determine the DSCP values with which the IP packets are marked unless they are changed in the switch.
The 6608 and 6624 will tag packets as follows:
COS = 5 for rtp traffic
COS = 3 for signalling traffic
By default on the Catalyst 6000, these COS values map in IP packets to DSCP 24 (COS = 3) and 40 (COS = 5) as shown in the table below.
Generally, the recommended DSCP values to use in a VoIP network differ slightly. They are:
DSCP = 46 for rtp traffic (Recommended Expedited Forwarding (EF) value)
COS = 26 for signalling traffic (AF31)
It may be necessary to change the default COS-DSCP mapping on the Catalyst 6000 so that the DSCP markings in packets generated by the 6608 and 6624 cards conform to the network policy. For example, if other devices in the network are marking packets with the recommended values.
Information on how to change the default COS-DSCP mapping is provided in the Mapping Received CoS Values to Internal DSCP Values section of Catalyst 6000 Family Software Configuration Guide.

Similar Messages

DSCP and CoS mapping to use uAPSD

Hi CISCO experts, I'm trying to map some traffic to a DSCP and CoS priority. The fact is that doesn't work.
Steps:
1.Set personal filter (myfilter)to forward from specific IP.
2.Set QoS policy: my_policy --> myfilter-CoS (4).
3. Add policy to 802.11g.
When I look up the IP traces DSCP is allways 0x00 (Best Efford).
If I map DSCP (best efford) to DSCP (vocie) doesnt work either.
What can I do? Im trying to emulate AC_VO or AC_VE so I can force the uAPSD protocol to work.
Best regards

Are you using a Cisco WLAN controller or autonomous AP?
You would need to ensure that the RTP (voice) packets to the AP has DSCP = EF.
There is an auto policy in the WLAN controller to map EF to UP6.
For autonomous, will need to create a QoS policy to do this.
But you do not want to map DSCP = 0 to UP6!
This defeats the purpose.
Will only want RTP packets to be marked as EF.
See the WLAN SRND and 7921G Deployment Guides for more info.
http://www.cisco.com/application/pdf/en/us/guest/netsol/ns279/c649/ccmigration_09186a00808d9330.pdf
http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7921g/5_0/english/install/guide/7921dply.pdf

CoS/DSCP to queue mapping in Cat 3750

Hi..
Cat 3750 supports mapping of CoS to queue as well as mapping DSCP to queue.
WOuld like to understand which one will the switch use when actually placing packets in the queue..
thanks
Eng Wee

My apologies, that was not a very good explanation :-)
Here is what really happens:
- when a frame is received on a port, the switch maps the CoS or DSCP in the packet to a QoS label to distinguish one kind of traffic from another. If the port is set to trust CoS, the CoS value is used to generate the QoS label. If the port is set to trust DSCP, the DSCP value is used to generate the QoS label.
- The QoS label that is generated identifies all future QoS actions to be performed on this packet.
- when the packet is switched to the egress interface, an output queue is selected based on the QoS label. If the QoS label was based on DSCP, the DSCP-to-queue mapping is used. If the QoS label was based on CoS, the CoS-to-queue mapping is used.
Hope that helps - pls rate the post if it does.
Paresh

EXP-COS mapping on 3750M

Hi,
I am using 3750 as a L2 switch in between MPLS PE and MPLS P router. The ports (on 3750M) connecting to MPLS devices are just L2 ports no IP or no LDP. I want to know if I can configure QOS on L2 ports of 3750. Can I map MPLS EXP to COS on switch?
regards,
Gaurav

Hi,
You will not be able to do this, as the switches look at the layer 2 or 3 cos markings, whilst the MPLS exp value is at layer 2.5, between the IP and MAC layers.
But if the MPLS exp value has been set from that of the IP precedence/DSCP from the CE packet, aka uniform mode MPLS QOS, then you can just use your cos maps to match the ip dscp/precendence to cos etc.
HTH
LR

QoS - can u trust dscp and cos?

Hello,
is it possible to trust DSCP and COS at the same time?
If so, which one wins?

G'day,
It does not really make sense to trust both DSCP and CoS at the same time. You configure your switch to trust one or none of these.
As an example, if you did have the capability to trust both DSCP and CoS, imagine what would happen if you received a frame with DSCP EF and CoS 0 ? You would be faced with a conflicting situation ... if you trusted CoS, you would give a potentially high-priority packet lesser service. Whereas if you trusted DSCP, you could end up giving a potentially low-priority packet voice-like service... So the option of trusting both is not allowed.
Hope that helps - pls rate the post if it does.
Paresh

Why doesn't iOS six maps show traffic data?

I have turned on show traffic data and the map still is without any traffic

iOS 6 Maps' Show traffic is a bit obscure. It shows red dots and lines to show where traffic is heavy like so:

QoS - DSCP or CoS

Our Environment:
-We have about 200 Polycom VoIP phones (SoundPoint IP335). These phones utilize DSCP - EF. However, CDP is currently disabled by our provider. These phones are 100% cloud managed. Every call, even the internal between two local phones has to go out to the cloud and back.
-We have 53 Cisco access points AIR-CAP3502I-A-K9 connected to our Cisco WLC-5508 controllers.
-We have 2960-S stackable access layer switches as well as primary and secondary L2/L3 Core switches WS-C3560E-12D-E.
OUR GOALS:
1. We would like to implement an End-To-End QoS solution in our environment utilizing the Auto QoS configuration macros for both the Wi-Fi Access Points that use QoS and WiFi Controllers.
2. We would like to implement an End-To-End QoS solution in our environment utilizing the Auto QoS configuration macros for our VoIP phones.
Proposed solution:
1. Enable QoS on ALL switches and ultimately Routers by using :
mls qos
2. On the switchports facing the Access Points use:
mls qos trust dscp
3. On the switchport facing the Polycom VoIP phones use:
auto qos voip trust
mls qos trust dscp
4. On the trunks between the access layers switches and our Cores, we would like to use DSCP. Lots of different documentations state to use CoS should be used acrooss layer 2 uplinks and that DSCP should be used across Layer 3 uplinks. However, DSCP is able to pass these layer 2 links without any rewrite by CoS. Trunks between all L2/L3 switches would be configured as follows:
auto qos voip trust
mls qos trust dscp
Questions:
-is this configuration valid?
-Is this design future-proof enough so that it NOT only serves the VoIP traffic in the future but other traffic possible future traffic such as video, and etc.
-Should we be using CoS vs. DSCP?
-i noticed that our 2960-S switches have "auto qos srnd4" configured BUT our
Core Switches don't. Should this be enabled on the Core switches as well? I noticed that "auto qos srnd4" enabled causes our 2960S switches change the "auto qos voip trust" being displayed in the running configuration as "auto qos trust". Not sure why is this happening. But if you turn off "auto qos srnd4" the command sticks and it is shown properly within the 2060-S running config.
Thanks.

Hello.
I doubt if "auto qos voip trust" would suit you on inter-switch links, as per documentation the command applies policy-map that gives only 320K for voice and signalling traffic (+ remarking exceeded traffic to BE).
If you want to protect your video traffic in the future, you will have to design new QoS policy and apply it per link.
Regarding "trust dscp" toward WLC/AP - if you configure this, all your laptops will be able to inject marked traffic into your network, abusing your QoS policy; that is why the best practice for VoIP phones is to be placed into dedicated voice VLAN + trust cos (not dscp).
PS: I would suggest you to try the command[s] on one switch and see what configuration will be applied per port (+global).

QoS trust dscp or cos on catalyst 4500

We have a 4510R with Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software cat4500e-UNIVERSALK9-M), Version 03.05.02.E RELEASE SOFTWARE (fc1).
I want use qos trust dscp or qos trust cos on the interface conected to other cisco switch or wlan controller.
The current IOS version, do not support qos trust dscp:
SW(config)#interface gi10/16
SW(config-if)#qos tr
SW(config-if)#qos trust ?
device trusted device class
extend Extend trust through a connected device
SW(config-if)#qos trust device ?
cisco-phone   Cisco IP Phone
cts           Cisco-telepresence
ip-camera     Cisco video surveillance camera
media-player Cisco Digital Media Player
SW(config-if)#qos trust device
What is the software that I need for this?. I tried with command lookup tool but the cat4500 do not appears.

That is even new for me.
I did a search and found that, now a days you no longer have to provide the Trust DSCP command, it is by default trusted.
Went through this White Paper and excerpts are below:
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-4500-series-switches/white_paper_c11-539588.html
The answer to your question comes from the following excerpt :-
"Previously supervisor engines relied on “port trust” to classify traffic; however, this does not fall into the MQC CLI construct. MQC provides a more flexible capability, i.e. all traffic is trusted by default, an administrator can change this trust state using a policy map. Another difference is the “internal DSCP” value used within the switch to place packets in the proper queue.
Cisco Catalyst 4500E Supervisor Engines do not use “internal DSCP”; rather, it relies on explicit matching of QoS values using class maps so that packets can be placed in the correct queue.
Also, note that there is no specific priority queue: it is not queue 3 or queue 1. The priority queue is simply configured within a class; therefore, it is not tied to a specific queue. One final difference is that of classification. Cisco Catalyst 4500E Supervisor Engines provide sequential classification rather than parallel. This allows the network administrator to classify traffic at egress based on the ingress markings. These markings can be done unconditionally, using a policer or using a table map. Based on these changes, QoS CLI will now be more contiguous on the Supervisor Engines as it will now have standard Cisco MQC CLI, making configuration management much simpler"
HTH,
Please rate all helpful posts.
Regards

Calling DSCP or IP Precedence on traffic Policing

Hi Guys,
I have a good question and I can say it's challenging questiion. we have some policy-map on some interfaces but because these interfaces are dedicated to some customers that they are using just for voice and video. I put some detaqil for better understanding
router#sh policy-map QOS:POLICE:100M:pm-q
Policy Map QOS:POLICE:100M:pm-q
    Class class-default
     police cir 100000000 bc 3125000
       conform-action transmit
       exceed-action drop
     service-policy QOS:RATE:30-x:pm-q
router#sh policy-map QOS:RATE:30-x:pm-q
Policy Map QOS:RATE:30-x:pm-q
    Class QOS:REALTIME:cm-q
      set qos-group 5
     police cir percent 30
       conform-action transmit
       exceed-action drop
    Class QOS:INTERACTIVE:cm-q
      set qos-group 3
    Class QOS:CONTROL:cm-q
      set qos-group 6
     police cir percent 10
       conform-action transmit
       exceed-action drop
    Class QOS:BUSINESSDATA:cm-q
      set qos-group 1
    Class class-default
      set qos-group 0
we put this because we expected gauranty 30% of that bandwidth. It means we expected gauranty 30mbps but now guys saying this type of configuration is not working because calling dscp on policing is not working.
now we have to change it to below
router#Policy Map QOS:POLV2:GWS:100M:pm-q
    Class QOS:INT:MPLS:cm-q
     police cir 120000000 bc 21000000 be 42000000
       conform-action transmit
       exceed-action drop
       violate-action drop
now question is this change right ?
Thanks
Majid

Sarah
1) L2 switches can trust the dscp marking as well. The 2960 is a layer 2 only switch and the default is untrusted but if you then enter
"mls qos trusted" you have a choice of 'cos|dscp|ip-precedence'. The default if no choice is entered is DSCP.
2) If "mls qos trust dscp" is entered then the switch will use the DSCP marking found in the packet. This will then be used as the internal DSCP marking that all switches use. Unless you have a DSCP-DSCP mutation map the value used will be the value received in the packet.
Jon

Firefox can't run the map from Traffic England.

Firefox will load Traffic England home page but wont run the map. It starts to load and then stalls with just the Java logo on a black background. Map works fine with Explorer and used to work fine with earlier versions of Frefox.

If the Maps App is not functioning try this.
Double tap the home button to bring up the recent apps at the bottom. Find the Map app and hold down on the icon until it begins to wiggle. Tap the minus sign in the upper left corner of the icon to quit the app. Tap the home button and the icons will stop wiggling. Then tap the screen to return to the home screen.
Now restart by holding down on the sleep button until the red slider appears then slide to shut down. Hold down on the sleep button until the Apple logo appears and let go of the button. When the iPad has started up, try the Map app again.
It is impossible to delete or re-download the pre installed iPad apps. Safari, iTunes, Maps and so on.

DSCP vs CoS

I need to think outloud here, just to make sure I have my barings right.
CoS is stored in the vlan tag, DSCP is stored in the IP header. So, if I have a phone or an app that can insert a DSCP value into the IP header and then trust all of the uplinks to my destination, when, how or why would CoS ever come into the picture? Looking into deploying QoS on both wired and wireless networks and want to solidify my understanding.

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
So, if I have a phone or an app that can insert a DSCP value into the IP header and then trust all of the uplinks to my destination, when, how or why would CoS ever come into the picture?
If L3 ToS is supported, the only reason to really used L2 Cos is when L3 ToS is not supported. (E.g. "pure" L2 switches.)

Dot1q-tunnel cos mapping

Is it possible to map the cos from a tagged frame into the metro tag cos field when it enters a dot1q-tunnel port?
The only option I see to set cos on a dot1q-tunnel port is to statically configure a value using the <mls qos cos <value> > commmand, this is with the 3750.
Thanks

It all depends on the hardware.
For example 3750 Metro support copying inner CoS value to the outer tag. It is also supported by 4500s with SUPV-10GE.
Also this functionality is possible with ES20 cards in 7600.
Overall there is not much hardware that support it. The functionality you are looking for is called "ntelligent IEEE 802.1Q tunneling QoS"
http://www.cisco.com/en/US/docs/switches/metro/catalyst3750m/software/release/12.2_25_seg_seg1/configuration/guide/swtunnel.html#wp1010491

Nokia Maps: No traffic even after successful updat...

Hi, I’ve been using Nokia Maps for my 5800 and have been very impressed (it’s not perfect but given it’s free...). However, the only one bit that seems to *never* work is the traffic updates (I have tried several times). When using navigation, I choose “update traffic”, it says “updated successfully” but I see no traffic anywhere (on the map, on the traffic update screen...).
Any ideas!? Traffic would be really useful!
(I am UK based using 5800 and v3.03 of Nokia Maps...and there has definitely been traffic when I’ve checked!)
Solved!
Go to Solution.

Hi,
I'm in the UK and was stuck in huge traffic jam on the M60 motorway yesterday and the ovi maps version 3.03 didn't show any traffic problems, despite having the phone report that it had successfully updated the traffic information.
Any ideas what's going on?
Dave.
http://dadhacker.blogspot.com
http://dadhacker.blogspot.com

IOS 6's Maps With Traffic Reports

I read that iOS 6's Maps' traffic reports aren't good as Google Maps' in iOS 5.x. Is that true? Are there any screen captures/shots of iOS 6's and any alternatives?
Thank you in advance.

It's working OK for me.
Have you tried terminating the Maps app, restarting or resetting your iPhone?
To terminating and restarting Maps:
1. Press the Home button
2. Double click the Home button to bring up the "Recent Apps" tray.
3. Touch and hold on the Maps icon in the "Recent Apps" tray until a "-" appears.
4. Touch the "-" to terminate Maps.
5. Restart Maps.
Restart: Press On/Off button until the Slide to Power Off slider appears, select Slide to Power Off and, after the iPhone shuts down, then press the On/Off button until the Apple logo appears.
Reset: Press the Home and On/Off buttons at the same time and hold them until the Apple logo appears (about 10 seconds). Ignore the "Slide to power off"

Maps and traffic...

why since the new update does the blue line (for route) cover up the traffic! Does anyone know how to fix that?

Prim_rohan wrote:
Can anyone say What is the latest firmware version for e5?
Would need to know whether your E5-00 RM-632, RM-634 or RM-699 for definitive answer but in this order it is either 101.3 or 102.2 for RM-632, 101.3 for RM-634 and 43.17 for RM-699.
Happy to have helped forum in a small way with a Support Ratio = 37.0

DSCP to CoS mapping: Avaya traffic

Similar Messages

Maybe you are looking for