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New Member

QOS Marking Query

Dear All,

Attached is Rough Dia of the Setup we have.

We have subscribed for MPLS links from Service provider we have a DC where the core connectivity is 90 MB and Remote branch location Connectivity is 64 Kbps. We are in process of enabling QOS for our links with co-ordination with Service provider ; as per our finding the branches have more RX traffic (downloading) so after discussion with provider we were advised to mark traffic from the core end and give it to the provider.

The provider at its PE will honor the marking and set some B/W percentages and prioroty based on the DSCP marking values.

We need to mark this traffic so it is feasible to mark the traffic at the core DC router which has the below H/W details

Cisco 7206VXR (NPE-G2) processor (revision A) with 917504K/65536K bytes of memory.

Processor board ID 36161439

MPC7448 CPU at 1666Mhz, Implementation 0, Rev 2.2

6 slot VXR midplane, Version 2.11

or is it feasible to mark the traffic at the core switch; kindly advise

Regards,

Ranjit

6 REPLIES

QOS Marking Query

Hi,

It is always advisable to mark the packets as close to the source as possible.

Yes you can definately mark it on your Core DC Router; however if you are planning to mark packets at switching level; try to mark it at distribution level and not the core.

HTH,

Smitesh

Super Bronze

QOS Marking Query

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

On the 7200 you should easily be able to mark and since it generally offers much in the way of QoS features, you can do QoS generally unavailable on most switches.  For example, if your IOS supports NBAR, you can even marked based on the content of HTTP packets.

A note of caustion, enabling additional features can impact your router's CPU usage, so you should monitor before and after CPU usage.

PS:

This morning, wasn't able to view your Visio diagram, but depending on your expected data flows, it might be possible to implement QoS better than your MPLS vendor will support.

New Member

QOS Marking Query

Dear Joseph,

Thanks for your post can you elaborate more on the same.

Regards,

Ranjit

Super Bronze

QOS Marking Query

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

What specifically would you like further elaboration on?  I finally was able to see your Visio, but many details unknown.  For example, you only show HQ and branch connected to the MPLS cloud, but normally those using a WAN cloud have multiple connected sites.  Do you?  If so, would traffic normally pass between them?

You don't describe what kind of interface is involved that provides the 90 Mbps.  You don't describe the IOS versions you're using on your routers (which impact available QoS features).

What specifically is your MPLS vendor going to support for QoS?

New Member

QOS Marking Query

HI Joseph,

IN all we have 2900 branches connected the same way as the single branch but all  the branch traffic comes to the DC to access critical applications.

Interface involved in DC (HQ) 90 is GIG port and @ branch end is serial interface

H/W details as below

HQ :---> 7206 VXR :---> c7200p-advsecurityk9-mz.124-15.T8.BIN

Branch :---. 1841 :------> c1841-advsecurityk9-mz.150-1.M3.bin

vendor is going to configure different classes as per our marking and assigning B/w for the same.

Regards,

Ranjit

Super Bronze

QOS Marking Query

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

For 2900 branches, you will need to rely on your vendors MPLS QoS but additionally you probably should implement QoS on the 7200 in case the 90 Mbps interface congests.  Further, if the 90 Mbps isn't physical interface bandwidth, you should shape for it too.

You can both examine and mark on you egress policy.

e.g. (NB: syntax might be incorrect)

class-map match-any FTP

match protocol FTP

policy-map CBWFQ_90Mbps

class class-default

shape 90000000

service-policy CBWFQ

policy-map CBWFQ

class FTP

bandwidth percent 1

set dscp CS1

class class-default

set dscp BE

fair-queue

interface egress

service-policy out CBWFQ_90Mbps

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