Hi, I've read the documentation about HTB and I pretty much managed to grasp how it works. In theory. But there still are some questions and I want to check with you to see if I understand things correctly. So here goes: 1) when used on a router for shaping traffic done by clients connected to it, shaping is done on the interface connected to the cable/dsl modem. If I wanted to create classes for every client on the network, I would have to use iptables to mark packets (using -j MARK) and not filters because, according to http://www.docum.org/docum.org/kptd/ the shaping is done after the SNAT, so all the clients would have the src address rewritten with the public IP. Am I getting this right? 2) shaping inbound traffic is tricky because you can't control the rate that the packets come to you. Is it a good idea to shape the outgoing traffic to the clients on the LAN side NIC? Would I achieve both upload and download shaping using the same htb script (a script that does shaping using iptables for marking packets and fw for matching them) on both NICs (LAN side and ISP side)? 3) I've tried to find an answer to this question but all I got was some similar question a couple of years ago from Martin Brown. What happens if shaping a variable bandwidth link and, at one moment, for a period of time, the available bandwidth goes beyond the rate specified for the class 1:1 (the class attached to the root qdisc)? How will htb act in such a situation? 4) related to 3), I've tried to use a syntax like this: "tc clas add dev $ETH parent 1:0 classid 1:1 htb rate $RATE ceil $CEIL", where CEIL > RATE , but the max speed I achieved was the RATE speed. After further reading, I found out that you can't (well, you can, there's no syntax error, but it's useless) specify CEIL for the class attached to the root qdisc because it doesn't have a parent to borrow from. So is there a way to simulate a variable bandwidth link or should I just set RATE to the highest possible value the bandwidth can reach? 5) related to 1). Is there a (major) difference between -j MARK and -j CLASSIFY? From what I've read, -j CLASSIFY sets both the major and minor (major:minor) numbers to be matched while -j MARK only sets the minor. That's about it for now. :) Thanks ____________________________________________________ Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
