Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium


Is there a tool to place dscp tags on a ping or traceroute

Posted on 2011-10-13
Medium Priority
Last Modified: 2012-05-12
I tried useing pathping and the documentation lists a couple of command line switches for QOS but in my windows 7 pathping command I don't see that option. Winxp had the -P Test for DSCP PATH connectivity and -R Test if each hop is RSVP aware and -T Test connectivity to each hop with Layer-2 priority tags

 With xp using the -P and -R switches I get "Could not send packet error code is 10013" and if I try the -T I get "Could not register as a traffic control client. error code is 110"

Is there another utility that I can use to test where layer 3 voip may be losing DSCP markings? We don't use layer 2 cos so I don't thing -T would have helped anyway.

Question by:Dragon0x40
  • 2
LVL 17

Accepted Solution

rochey2009 earned 2000 total points
ID: 36968377

If you use an extended ping from a cisco switch or router you can place the DSCP value in the Type of service field (under the extended commands option).

Protocol [ip]:
Target IP address:
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface:
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:

Author Comment

ID: 36982929
For EF DSCP 46 the TOS would be 184?

Here's the mapping you will need.  "=" means something like "maps to" or "is equivelent to".

ef = dscp 46 = 101110 = tos 0xb8 (184) = ip prec 5

af31 = dscp 26 = 011010 = tos 0x68 (104) = ip prec 3

af32 = dscp 28 = 011100 = tos 0x70 (112) = ip prec 3

cs3 = dscp 24 = 011000 = tos 0x60 (96)  = ip prec 3

You'll want to use the decimal tos values (in parenthesis) for your e-pings.

LVL 17

Expert Comment

ID: 36982955

Featured Post

Reclaim your office - Try the MB 660 headset now!

High level of background noise often makes it difficult for employees to concentrate fully on their jobs – or to communicate clearly on calls. The MB 660 headset helps you create a disruption free workspace.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In the world of WAN, QoS is a pretty important topic for most, if not all, networks. Some WAN technologies have QoS mechanisms built in, but others, such as some L2 WAN's, don't have QoS control in the provider cloud.
As companies replace their old PBX phone systems with Unified IP Communications, many are finding out that legacy applications such as fax do not work well with VoIP. Fortunately, Cloud Faxing provides a cost-effective alternative that works over an…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

581 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question