DSCP implementation on NS3

[fpmw]

All,

I found the following URL: http://www.eng.uwi.tt/depts/elec/staff/rvadams/sramroop/Core_Node.htm
which is an implementation of DSCP for NS3. Are there any people that actually used this, except for the author :-)
If so, what are your experiences with this code?


Regards,
Frank

[sarah boufelja]

Dear Frank,
I'm using this code in my project and it's working well, the DiffServ queues realize the DSCP marqing as we expect. Actually, you have to understand the code's details by yourself ( which is sometimes more difficult than writing your own code).
I hope this helps
Regards

[fpmw]

Op dinsdag 4 september 2012 12:19:10 UTC+2 schreef sarah het volgende:

[fpmw]

Ah, ok. Will have a look at it.
Did you manage to mark traffic when it flows through edge/core nodes based on bandwidth?

Regards,
Frank

[sarah boufelja]

What you can do is to mark the traffic according to the IP source/destination addresses and port source/destination numbers, this is done in the SLA (Service Level Agreement) where you specify the flows' marking

[Javier Figueroa]

Hi!

When i tried to use the DiffServQueue.cc and DiffServQueue.h i had some compilation errors because they are using some libraries that, according to what i have read, they no longer exists. Or even worst, i have read that DiffServ classes are not yet supported on NS-3. But i have alse read about people that have done it so i am confused. According to some other forums, the only way of setting a DSCP value is using the setDSCP method of the ipv4Header class....is this implementation much different than  DiffServQueue.cc?

[Tommaso Pecorella]

Hi,

the thread you are using is from 2012, i.e., 2 years ago.

Please start a new thread and describe exactly what you are trying to do.

DiffServ is partially supported by ns-3, meaning that you can:

1) set the packets DSCP bits in IPv4 and IPv6 headers

2) interact with DSCP hosts through emulation

3) use the DSCP bits to set the MAC-level QoS bits (e.g., for Wi-Fi). This may require some work.

What you can not do is:

1) differentiate the traffic at IP level (IP doesn't have output queues yet)

I am not totally sure if the AQM techniques in ns-3 are DSCP-aware.

However, this doesn't cover what you could do with DCE.

Said so, please do not reply to 2-years old threads and be aware old posts may contain extremely outdated informations.

Thanks,

T.

[Javier Figueroa]

Thank you T.
Do you have the link of a more updated thread?

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[Joyanta Biswas]

Hi, I was just wondering is there any resource that I can look for the DSCP in latest ns3. I did some code and set Type of Services (TOS) bits in the header, but look like the intermediate nodes are not obeying the TOS/DSCP rule. I have attached the code here. I send packets having TOS as EF (Expedited Forwarding) and AF32 (Assured Forwarding), but both of them encounter the same delay, which supposed not to be the case, as they share a common link. I guessI need to put the concept of priority queue here, but no sure how to do that. Please let me know, if you know any work around of this problem.

Thanks

Joyanta