Brian J. Murrell wrote: > > ppp0 1 full*98/100 full 1 tcp-ack,tos-minimize-delay >> ppp0 2 full/100 full 2 default >> ppp0 3 full/100 full 2 > >So is class "1" limited to 98% bandwidth or full? It seems it would be >full (otherwise what's the point of the CIEL?). If class "1" is unused >can class 2 get 100% of the bandwidth? If both class 2 and 3 are >over-saturating, does class 2 get 100% of the bandwidth because of it's >priority?
It means class 1 is 'only' guaranteed 98% of the bandwidth, but if the rest is unused then it can go up to 100%. The other two classes are only guaranteed 1%, but each can go up to 100% if nothing else is using it. Rate is the guaranteed bandwidth - ie if everything tries to use all the bandwidth, that is what each class will get. The sum of the individual rates MUST NOT exceed the available rate or the system will not work. Ceil (ceiling) is the maximum that a class can use when there is spare capacity. The ceiling values may add up to more than the available bandwidth, but no individual should exceed what's available. The much bigger problem IMHO is that many (most ?) SOHO users don't know what their available bandwidth is and/or it is variable. At home, I have about 6Mbps down and 448kbps up on the ADSL line, but then I hit contention with other users in the backhaul to the ISPs data center - thus my available bandwidth may be just a small fraction of the headline rate at busy times (a cause of great complaint here in the UK !). That, IMO, gives me three options : 1) manage down to a rate much lower than my line rate in the hope (not guaranteed) that I will never exceed my 'fair share' of the ISPs bandwidth 2) manage to the ADSL line rate, and accept that for a significant part of the day it will be ineffective. 3) Not bother because neither of the above is much better - that's the option I'm running at the moment. ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Shorewall-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/shorewall-users
