search for: diffserv

...gentler bulk transfer protocol seems desirable. This add support for user and server selectable congestion control algorithms. As examples: --congestion-alg=lp # For the tcp-lp algorithm on the command line Or in a subsection: [mystuff] congestion alg = westwood # for a wireless connection And diffserv support: --diffserv=8 for setting the CS1 bit This could be improved by being able to specify a list of congestion algorithms to try, symbolic names for diffserv (CS1), a better name than 'congestion-alg', and some error checking. Signed-off-by: Dave Taht <d at taht.net> --- loadpa...

...struggling to find the resources and know how to implement what I need. What I have is a PC with 2 interfaces and a control program on that PC. In the control program I can specify an IP Flow with source and dest IP address, source and dest port, and a QoS class (1-5 which can be mapped to a DiffServ class) - in the control program I want to be able to add these IP Flows to the traffic control rules on the fly, and also to be able to remove them. As I see it: When I enforce IP Flows in the router both interfaces must mark (according to the QoS class) and forward packets that fit the criteri...

I''m trying to find up to date information on diffserv, and it seems like either nobody is using it, or nobody is talking about using it. Is there some good site for information about using diffserv with new kernels? The last update on diffserv.sourceforge.net is in 2001, and most of the mailing list results are from that time. Has everyone moved...

Hi, I''m interested in prioritizing all packets with the SYN bit on, both with and without the ACK bit on (but specially the SYN ACKS). I am checking is the use of Diffserv. From a paper I read I understood that when Diffserv is on, all "Control Traffic", including TCP SYN-ACKs, gets by default into "band 0" of Diffserv, the highest priority out of 16 bands. If true, this can suit my needs. The paper name is "Implementation of SRPT Schedulin...

.... >From our set of experiments we have a particular case: Suppose a host A want to initiate traffic of some kind to host B, where A and B are connected by two intermediate routers wherein there can be other connections from the router. Our needs are as follows 1. We assume that routers are Diffserv routers and provide us QoS but we will also assume that routers are not in our network boundaries. 2. The network will be working as Best Effort network until our application requests required end to end QoS. 3. Our application negotiates the QoS requirements and then network sets it up for...

Hello, This is a question about diffserv on linux. We know, there is a file sch_dsmark in linux source code. Now, i want to add something in the function dsmark_enqueue, for example, i want to add a function which can add a class and queue automately in dsmark_enqueue. That is, not using the command tc. After adding one, it works well,...

All: I am tasked with creating an environment in which DiffServ and IP precedence is handled as close to RFC specification as possible. I have a few problems with implementing this based on current queueing structure. Here are a few of my questions. 1.) Is there any way to get DiffServ AF drop levels without using DSMARK and GRED? Ex. AF11 Gred DP 1 A...

Hello, As we know that there are four kinds of AF in diffserv architecture, and each kind has three different priorities. So, there are 12 different kinds of AF, is it right? Of course, each AF has its recommended DSCP value. Then, we know the AF is classified into four differnt classes, such as AF1, AF2, AF3, and AF4. But in a Diffserv domain, and in the cor...

Hello Merry Christmas, I want to know whether there are anyone who has been familiar with the source code in linux kernel about Diffserv, I think i have met lots of troubles. A simple problem: if we use the command ''tc add class'' to add a class, do you think it will be in a Interrupt enviroment? That is, if i want to add a class or qdisc using TC, are there any interrupts int the kernel? Thanks for any responds,...

Hi guys, I am working on implementing Diffserv on linux project. I am using suse 8.0 professional kernel 2.4.21. I have the following RPM:iproute2-2.4.7-697.rpm This supports a number of linux qdisc like cbq, htb among many others but it has no support for DSMARK, which I wish to use. Does anyone know of any patch that I could used or any othe...

Hi, There is some extra information in this email! I am working on implementing Diffserv on linux project. I am using suse 8.0 professional kernel 2.4.21. I have the following RPM:iproute2-2.4.7-697.rpm This supports a number of linux qdisc like cbq, htb among many others but it has no support for DSMARK, which I wish to use. Does anyone know of any patch that I could used or any othe...

I am trying to compare the behaviour of the Linux DiffServ implementation with that of Cisco, in DSCP remarking for traffic policing. As I understand it, the DSCP is marked at the egress interface (parent queue), based on the class that packets are in. I am looking at what happens at an inter-AS boundary. DSCP marked traffic coming into the Edge Router ne...

Hi! I am learning tcng without having experiance of tc and I am trying to build something that shall schedule traffic dependent on the value in the IPv4 packets ip_ttl field. I have read the tcng reference manual and cannot find information about forwarding. Is it possible to farward packets from ingress to egress without sending them upwards in layers?

Hi! I have a Traffic Control/QoS question about the W(RED - Random Early Detection/Discard) curve implementation in the Traffic Control environment. Is this the right curve for RED - has it been tried to be implemented in the Traffic Control environment?: An Analytical RED Function Design Guaranteeing Stable System Behavior: http://www.ist-mobydick.org/publications/aqm_iscc2003.pdf Citat:

& If can HOW ? thx

Hi all, Supposedly my router is itself streaming traffic to clients. Is it possible for it to mark its packets before going through dsmark?? I have gone through the examples in iproute2/examples, i noticed that there''s always an ingress and egress of which these are 2 different dev. Is it possible for before ingress and egress be the same dev?? I tried the script below but

Hi, I want to use the dsmark, but it always says: "unkown qdisc", although I have enabled it (y in Network options), and I have my kernel recompiled. I am using SuSE 8.1, 2.4.20 Kernel, tc available at the HTB site (with already precompiled HTB queue). Can anybody find the problem? thx _________________________________________________________________ MSN 8 helps eliminate e-mail

I''m successfully using HTB + GRED to shape traffic based on the DSCP field. I would like to strip the DSCP and possibly replace it with normal ToS bits on egress traffic leaving my network. Leaving DSCP set is pointless, and could potentially cause problems with some ISPs that use DSCP internally I suppose. Setting ToS bits would seem ideal as most networks still honor it to varying

Im experimenting with using a Linux machine with 3 interfaces to operate as a core router. All links and network interfaces are 100mbit. Below is a ascii diagram of the network. (network A) edge router ------>core router---->edge router (network C) ^ | | edge router (network B) I have tried two

hi, > > i am working on the diffserv implementation in linux. > i am new to this work and first time i am working on red hat along > with diffserv tech. > > i have compiled my kernel with the proper compilation of the...