hi,
i am currently working on a project on "design of diffserv testbed
in linux". i am using tc utility of iproute2 for it. The qdisc dsmark used
for marking the DS codepoint at the first hop router makes number of classes
depending on the indices given in the command. But i am not clear how at
the first hop router does scheduling takes place. what i mean is if i have
two flows, whose packets have been marked by different DSCP, then how to set
the order in which they will leave the interface i.e., how to prioritize
them .
my code at the first hop router is :
tc qdisc add dev eth0 handle 1: root dsmark indices 4
tc class change dev eth0 classid 1:1 dsmark mask 0x0 value 0xb8
tc class change dev eth0 classid 1:2 dsmark mask 0x03 value 0x58
tc class change dev eth0 classid 1:3 dsmark mask 0x0 value 0x0
tc filter add dev eth0 parent 1: protocol ip prio 1 u32 match ip dst
144.16.95.66/32 flowid 1:1
tc filter add dev eth0 parent 1: protocol ip prio 1 u32 match ip dst
10.219.80.1/32 flowid 1:2
tc filter add dev eth0 parent 1: protocol ip prio 2 u32 match ip dst 0/0
flowid 1:3
with this code running, i used ethereal to se the DSCP field. My packets
were marked properly but i don't how they were scheduled at the
interface.What else should i add to this code so that my packets marked with
0xb8 are prioritized compared to other flows or is there some default
priority built with respect to DS field?
can someone help me out !!
Amita Maheshwari
_______________________________________________
LARTC mailing list / [EMAIL PROTECTED]
http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
