Hello: I am trying to set up priority based queue for my VOIP traffic. I am running a RedHat 8.0 machine that is masquerading my internal network which has my PC and a VOIP phone. All VOIP traffic goes to and from my PBX, which is at 10.0.0.20. When I use my phone and try to download a file via FTP on my PC, all of the packets are going into the low priority queue. I typed these commands: echo 1 > /proc/sys/net/ipv4/ip_forward # Create the priority queue /sbin/tc qdisc add dev eth0 root handle 1: prio /sbin/tc qdisc add dev eth0 parent 1:1 handle 10: sfq /sbin/tc qdisc add dev eth0 parent 1:2 handle 20: sfq /sbin/tc qdisc add dev eth0 parent 1:3 handle 30: sfq # Add filters to put high priority packets into queue 1:1 /sbin/tc filter add dev eth0 pref 1 protocol ip parent 1:0 u32 match ip src 10.0.0.20 flowid 1:10 /sbin/tc filter add dev eth0 pref 1 protocol ip parent 1:0 u32 match ip dst 10.0.0.20 flowid 1:10 # Add a filter to put all remaining packets into queue 1:2 /sbin/tc filter add dev eth0 protocol ip parent 1:0 prio 2 u32 match ip dst 0.0.0.0/0 flowid 1:20 As you can see, from the output of '/sbin/tc -s qdisc ls dev eth0' there are no packets going into the high priority queue: qdisc sfq 30: quantum 1514b Sent 0 bytes 0 pkts (dropped 0, overlimits 0) qdisc sfq 20: quantum 1514b Sent 432501 bytes 5118 pkts (dropped 0, overlimits 0) qdisc sfq 10: quantum 1514b Sent 0 bytes 0 pkts (dropped 0, overlimits 0) qdisc prio 1: bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1 Sent 432501 bytes 5118 pkts (dropped 0, overlimits 0) Here is the output of /sbin/tc -s filter ls dev eth0: filter parent 1: protocol ip pref 1 u32 filter parent 1: protocol ip pref 1 u32 fh 801: ht divisor 1 filter parent 1: protocol ip pref 1 u32 fh 801::800 order 2048 key ht 801 bkt 0 flowid 1:20 match 00000000/00000000 at 16 filter parent 1: protocol ip pref 1 u32 fh 800: ht divisor 1 filter parent 1: protocol ip pref 1 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 1:10 match 0a000014/ffffffff at 12 filter parent 1: protocol ip pref 1 u32 fh 800::801 order 2049 key ht 800 bkt 0 flowid 1:10 match 0a000014/ffffffff at 16 filter parent 1: protocol ip pref 2 u32 filter parent 1: protocol ip pref 2 u32 fh 801: ht divisor 1 filter parent 1: protocol ip pref 2 u32 fh 801::800 order 2048 key ht 801 bkt 0 flowid 1:20 match 00000000/00000000 at 16 filter parent 1: protocol ip pref 2 u32 fh 800: ht divisor 1 filter parent 1: protocol ip pref 2 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 1:10 match 0a000014/ffffffff at 12 filter parent 1: protocol ip pref 2 u32 fh 800::801 order 2049 key ht 800 bkt 0 flowid 1:10 match 0a000014/ffffffff at 16 Any ideas why the high priority traffic is not getting separated from the rest? Thanks, Neil
