similar to: OSPF with Netem

Thanks in advance! Summary: when I load netem and teql together, teql doesn''t work correctly. (If I load teql only, everything is fine) I loaded both netem and teql. Netem is associated with eth0, and teql is associated with both eth0 and eth1. But traffic only goes out of eth1. Attached are the commands that I used to configure teql and netem (on machine 1), and commands to

I''m trying to setup a netem delay with no luck (using iproute2-2.6.8, compilation broke during arpd compile, so I use the tc binary in the tc/ subdir, there''s also a q_netem.so there). kernel is 2.6.8.1, compile with CPU cycle counter as time reference. I was using sch_delay of 2.6.7 happily with something like: tc qdisc add dev eth0 root 1: delay latency 1ms rate 35M now I use:

Hi! We want to run TCP streams to several port numbers through one interface, each with a different delay set by Netem. E.g. TCP streams to port 80 could have 50ms delay, while TCP streams to port 81 could have 100 ms delay and so on. We have tried to solve this by using a combination of tc filter and netem rules, but we can''t get it quite right. We are considering one class per port,

I''m trying to use tc and netem to delay packets from several different machines as they exit via eth0. Assume two source IPs, 10.0.0.122 and 10.0.0.133. I''d like to delay packets from the first one by 200ms, and packets from the second one by 300 ms. Any other traffic should be sent out normally. Here''s what I tried: # make three classes, 1:1, 1:2, and 1:3: tc qdisc add

Hi, I am using netem to add loss and then adding another qdisc within netem according to the wiki. Then i want to change the netem drop probability without having to delete the qdisc and recreate it. I try it but I get invalid argument: thorium-ini hedpe # tc qdisc add dev ath0 root handle 1:0 netem drop 1% thorium-ini hedpe # tc qdisc add dev ath0 parent 1:1 handle 10: xcp capacity 54Mbit

Hi all, I''m running some tests with netem and I noticed some strange behaviour that looks like a bug: I''m pinging another machine and adding delay with netem. When I tell netem to give me a 10ms delay, it works fine. The problem is that when I ask for a 11ms delay, it gives me 20ms! It happens for any value between 11ms an 20ms, and it repeats for values over 20ms, now

Hi, I want to study the multi-path TCP behavior (single TCP connection over multi-paths), and I am setting up the test bed. I have two machines, each with two network cards. I have directly connected two eth0, and I am trying to figure out how connect two eth1 to control the properties of this connection, so that I can study the TCP on multiple different paths (different in terms of latency,

Hi, The network topo looks like this: the original network: router1 router2 | | |----------------OSPF------------| the target network: (we need to insert a transparent firewall between these 2 routers, so a proxy arp is set up on firewall to bridge router1 and router2) router1 firewall router2 |

Hello, Please tell me if it's possible to use tinc together with OSPF (instead of static routes in LAN). By OSPF I mean Quagga's GNU/Linux daemon. Namely, I have a group of LANs (private 192.168.x.0/24 each). Each LAN has a GNU/Linux default gateway, 192.168.x.1, that also connects to the Internet via a public IP address (does NAT and firewall for the LAN "behind" it). tinc

The following (occuring on debian/testing with kernel-image-2.6.8-2-386 version 2.6.8-13 and iproute version 20041019-3) confuses me: # tc qdisc add dev eth0 root handle 1: prio # tc filter add dev eth0 parent 1: proto ip pref 1 handle 1 fw classid 1:2 # tc filter ls dev eth0 filter parent 1: protocol ip pref 1 fw filter parent 1: protocol ip pref 1 fw handle 0x1 classid 1:2 # tc filter del dev

hi i tried the example given on the examples page to duplicate selected traffic like tc qdisc add dev eth0 root handle 1: prio tc qdisc add dev eth0 parent 1:3 handle 3: netem duplicate 40% tc filter add dev eth0 protocol ip parent 1:0 prio 3 u32 match ip dst 11.0.2.2 flowid 1:3 when i ping from 11.0.2.2 to this interface my machine hangs. the same thing works for drop or delay. i would

Hi List, FYI. We have been using CentOS 6.4 and have 2 vpn/gre tunnels to separate cisco rtrs using ospf. with kernel 2.6.32-358.23.2 We have upgraded to 6.5 bit using kernel 2.6.32-431.5.1 and the exact same configuration scripts for our vpn/gre tunnels. What I see is the first gre tunnel works great and I get an ospf neighbor. The second tunnel comes up and I can ping across it and I see

Greetings, I have been asked to use NetEm to do a laboratory emulation of some low performance links of subset of a target network. My task manager has asked me to determine whether LSAs will increase in the lab configuration as compared to the target network. The subset of the target network that I have to emulate consists of 6 routers, A..F, in the following configuration, where (i) and

Hi Everyone, I have a routing situation where Tinc looks like it could come in extremely useful, but I have a query I hope someone can cast an eye on, as I'm unsure whether Tinc can help me here. I currently have a Quagga OSPF linux router which connects LAN A to LAN B over the quickest available of two routes (both routes at both ends connect to Quagga boxes to prevent collisions). One of

What shorewall rules would be required to allow the OSPF routing protocol to pass fw<->loc? Any suggestions would be appreciated. Ben

I have a fairly simply laid out network that could easily use static routing. However, I plan to expand quickly and don''t wish to spend the better part of my life maintaining static routes. INTERNET | --------- Gateway | - LAN 172.16.1.x | - LINK 192.168.1.1 --------- |<----wifi --------- router 2 | -LAN 172.16.2.x | -Link 192.168.1.2 ---------

Thanks Jim, that's understood. When I say AMBE isn't working well, I only mean from the audience acceptance point of view. Technically it is fine. It is exactly doing the job we had expected. It's the long standing wish that everyone wants... More for less. We are just seeking a bit of magic that just may not be there. Ideally finding a codec that can perform

Hi, I''m trying to set up 15 different delay intervals for packets leaving on an interface, using netems hanging off of a 16-band prio. I''m having trouble adding anything to bands higher than 10. Here''s what I tried: tc qdisc add dev eth0 root handle 1: prio bands 16 \ priomap 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I want all default traffic to go to

There is an design problem with the qdisc interface that causes qlen related bugs in netem, tbf, and other qdisc''s that peek at the top of the queue. The problem is that requeue needs to be called from the dequeue function but requeue can fail. If requeue fails, then the calling qdisc can not properly handle the error. If it returns NULL, then the parent''s expectation about qlen

Hello everybody, I''m trying to set up netem on a SuSE box (kernel 2.6.16), but I''m having some weird problems, considering that on my Gentoo laptop (kernel 2.6.17) it worked fine. If I write: # tc qdisc add dev eth0 root netem delay 20ms loss 20% and then try pinging another machine over eth0, I get a 24ms delay but no packet loss (while on my laptop I get 21ms and a correct