RE: [LARTC] DSCP remarking + GRED at one go?

[Hoon Titus <hoontitu@comp.nus.edu.sg>]

Hi everyone,

Thanks for the reply.

Sad to say but Jame's script doesn't work on my system :-(. Is it because
my kernel is too old? I have to keep it as i can't configure mrouted to
work on 2.4 kernel.

My router config: 2 NIC eth0 and eth1
2.2 kernel + DS8 patch + iproute2 2.2.4 + mrouted

I suspect the line "tc qdisc add dev eth0 handle 2:0 root dsmark indices
64 set_tc_index" which setup the 2nd DSMARK caused all the problem:
-------------------------------->8-----------------------------------------
#!/bin/bash

echo 'Init tc..'
#clear old entries
tc qdisc del dev eth0 handle 1:0 root dsmark indices 64 > /dev/null

#starts here
tc qdisc add dev eth0 handle 1:0 root dsmark indices 64

#setup the lookup table
echo 'Setup tc class..'
tc class change dev eth0 classid 1:1 dsmark mask 0x3 value 0x28
tc class change dev eth0 classid 1:2 dsmark mask 0x3 value 0x30
tc class change dev eth0 classid 1:3 dsmark mask 0x3 value 0x00

#setup the priority
echo 'Setup tc filter priority..'
tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1: u32 divisor 1
tc filter add dev eth0 parent 1:0 protocol ip prio 5 handle 2: u32 divisor 1

#Mcast layers - marked AF11 and AF12 accordingly
# AF11 to class id 1:1
# AF12 to class id 1:2
echo 'Filter according to MCast addr..'
tc filter add dev eth0 parent 1:0 prio 4 u32 match ip dst 225.1.1.1/32
flowid 1:1
tc filter add dev eth0 parent 1:0 prio 5 u32 match ip dst 225.1.1.6/32
flowid 1:2

# the rest of packets ends up with DSMARK 0x00
tc filter add dev eth0 parent 1:0 prio 5 u32 match ip dst 0.0.0.0/0 flowid
1:3

# handle 2:0
# --- General setup  ---
tc qdisc add dev eth0 handle 2:0 root dsmark indices 64 set_tc_index
.....
(the remaing lines are commented and as i found the tc qdisc add line has
caused the problem)
---------------------------------------------------------------------------

Once the 2nd DSMARK is added, the entire remarking system failed to work.
I have also have to add in the lines
"tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1: u32
divisor 1"
"tc filter add dev eth0 parent 1:0 protocol ip prio 5 handle 2: u32
divisor 1"
in order to use the remarking facility provided.

Can anyone please point out what's wrong (or any kernel limitation)?

Thanks and Regards,
Titus



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