I desperately need somebodys advice on my LLQ implementation (using CBQ). I want to get priority queueing (is this the low letency queueing?) on linux (as lonng as there is packet in the priority queue it is served first). HOW should I do traffic differentitation to get WORKING priority queueing on linux? My tests showed that there was NO DIFFERENCE between LLQ and CBWFQ (both via means of CBQ) Underneath there is LLQ iproute - script (for IPv4 and IPv6 flows) tc qdisc add dev eth1 root handle 1:0 cbq bandwidth 10mbit avpkt 1000 mpu 64 tc class add dev eth1 parent 1:0 classid 1:1 cbq bandwidth 10mbit rate 2mbit maxburst 1 allot 1000 avpkt 1000 bounded isolated tc class add dev eth1 parent 1:0 classid 1:2 cbq bandwidth 10mbit rate 200kbit weight 200 allot 1000 prio 1/* <-- priority queue */ maxburst 10 avpkt 1000 tc class add dev eth1 parent 1:0 classid 1:3 cbq bandwidth 10mbit rate 1.3mbit weight 1300 allot 1000 prio 2 /* <-- */ maxburst 10 avpkt 1000 #IPv4 #tc filter add dev eth1 parent 1:0 protocol ipv4 prio 1 u32 match ip tos 0x18 0xff classid 1:2 #tc filter add dev eth1 parent 1:0 protocol ipv4 prio 3 u32 match ip tos 0x00 0xff classid 1:3 #IPv6 tc filter add dev eth1 parent 1:0 protocol ipv6 prio 2 u32 match ip6 src 2001:6a8:802:7::2 classid 1:2 tc filter add dev eth1 parent 1:0 protocol ipv6 prio 4 u32 match ip6 src 2001:6a8:802:6::2 classid 1:3 router is configured like this.... H-------R--------H H------/ which means there are two generators (2Mb/s and 200Kb/s) and single sink. Router output link is 2Mb/s. 200Kb/s flow SHOULD be prioritized (EF PHB) whereas 2Mb/s is interference flow (BE PHB) JUST to see whether QoS works. Underneath there is CBWFQ configuration i used: tc qdisc add dev eth1 root handle 1:0 cbq bandwidth 10mbit avpkt 1000 mpu 64 tc class add dev eth1 parent 1:0 classid 1:1 cbq bandwidth 10mbit rate 2mbit maxburst 1 allot 1000 avpkt 1000 bounded isolated tc class add dev eth1 parent 1:0 classid 1:2 cbq bandwidth 10mbit rate 200kbit weight 200 allot 1000 maxburst 10 avpkt 1000 tc class add dev eth1 parent 1:0 classid 1:3 cbq bandwidth 10mbit rate 1.3mbit weight 1300 allot 1000 maxburst 10 avpkt 1000 #IPv4 #tc filter add dev eth1 parent 1:0 protocol ipv4 prio 1 u32 match ip tos 0x18 0xff classid 1:2 #tc filter add dev eth1 parent 1:0 protocol ipv4 prio 3 u32 match ip tos 0x00 0xff classid 1:3 #IPv6 tc filter add dev eth1 parent 1:0 protocol ipv6 prio 2 u32 match ip6 src 2001:6a8:802:7::2 classid 1:2 tc filter add dev eth1 parent 1:0 protocol ipv6 prio 4 u32 match ip6 src 2001:6a8:802:6::2 classid 1:3 what is wrong that I can not see service differentiation (cycles count for packet queueing at output interfaces are the same for CBWFQ and LLQ) Do you have any clue ?? is there sth wrong in config. files? should LLQ work the same as PQ? Shouldn't there BE different one way delay distribution for CBWFQ and LLQ????? DOES anyone knows PQ implementation for Linux that works? regards Adam - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
