Re: [LARTC] Complex Traffic shaping setup

[George Alexandru Dragoi <waruiinu@gmail.com>]

I'm not sure if you have to use different prio for filters (With fw
this is a must). Depends on your setup.
With htb, everything is attached with parent as root qdisc.


On Fri, 18 Feb 2005 18:27:26 +0530, Padam J Singh
<padam.singh@inventum.cc> wrote:
>  Hi!
>  
>  
>  I have the following setup using iproute2: 
>  
>  ====
>  | Root |
>  ====
>      |
>      |           =======>      ------------| Box Level 1 |
>      |           =======>      |
>      |           =======>      ------------| Box Level 2 |
>      |           =======>      |
>      |
>      |           =======>      ------------|    Users    |
>                  =======>                         | 
>                         |           =======>                         ------------|    User 1   |
>                         |           =======>                         |
>                         |           =======>                         ------------|    User 2   |
>                         |           ======== 
>                         |
>                         |           =======>                         ------------|     User 3  |
>                                     =======>  
>  
>  I am using HTB for each node, simply because it supports burst mode.
>  
>  There are box level classes (top level classes) that might limit bandiwdth
> based on protocols (http, smtp etc)
>  Then there are users classes which rate limit each user to a specific rate.
>  
>  Each Box Level and User Classes have associated Qdiscs as well.
>  
>  The issue is that HTB seems to be rate limiting only if I attach filters at
> the root (1:).
>  
>  Since classification for box level classes may also match more specific
> user filters are well, one of the two things happen:
>  
>  1. If the prio of the filters for Box level is higher or equal than that of
> Users, packets are only sent to the box level class, and since the rate at
> box level class is generally higher, the user starts exceeding his limit.
>  2. If the prio of the User filter is higher, packets matching the user
> filter are never sent to the Box level classes, making the box level rate
> for a particular protocol exceed the required for all users put together.
>  
>  Is there a solutions to this issue? I am unable to really find a solution
> since filters can only be applied to the root!
>  
>  Thanks in advance!
>  Padam Singh.
>  
> 


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