TC is used to configure traffic control in Linux kernel. Traffic control consists of the following:
- Shaping: Shaping is done at the outgoing interface, and includes throttling the bandwidth and/or smoothing the traffic bursts of the outgoing flows.
- Scheduling: Scheduling is also done at the outgoing interface and makes it possible to improve interactivity for traffic that needs it while still guaranteeing bandwidth to bulk transfers.
- Policing: Policing is done at the ingress and is primarily used for throttling the rate at which flows may arrive. [click to continue…]
The filter implemented in the RSVP-TE daemon for DiffServ over MPLS package was implemented using the CBQ qdisc, which is known to be complicated and inefficient . This filter was rewritten using the HTB qdisc for the given network topology and can be viewed on a logical level as follows [19,25]:
Fig. 8.4 TC Filter [click to continue…]
8.1 Network Topology
The topology of the test-network is as follows:
Fig. 8.1 Network Topology [click to continue…]
( Modified from , for HTB support for linux kernels 2.4.19 and lesser)
1.1 Installation of the Linux kernel
The default Linux kernel location is folder /usr/src/linux-2.4.18
(Specifically use kernel 2.4.18. Kernels 2.4.19, 2.4.20, 2.4.21 were tried and were found to give “kernel panic” on boot.)
– A copy of compressed kernel (linux-2.4.18.tar.bz2) has to be copied
to folder /usr/src/. This is the default kernel location, and the
intended start point for all further operations.
– This directory may contain a symbolic link linux to the old kernel
folder. If so this has to be removed. [click to continue…]
TC script for filter 1
# This script will set-up an example DS tree
#only set ENABLE_MPLS_IP to true if you installed the DSMPLS+IP patch
IFACES=”eth1 eth2 eth3″
if test $# -gt 0
case $1 in [click to continue…]