RE: using tc to drop packets based on the diffserc or tos value

Linux Advanced Routing and Traffic Control

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Thanks.

one more thing. I am using a iptable command to match dscp value and drop corresponding packets.

iptables -A INPUT -o eth0 -p udp -m --dscp 0x08 -j DROP

is the syntex of the command correct?

its showing following error: -

iptables v1.2.8: Couldn't load match `--dscp':/lib/iptables/libipt_--dscp.so: cannot open shared object file: No such file or directory

what should i do resolve the problem?

Regards,

Raghuvendra Kumar | BTSL
414 | Ext
011-41619770 | Desk
+91-9818143739 | Mobile
raghuvendra.kumar@xxxxxxxxxxxxxxxxxx | EMail

-----Original Message-----
From: Mohan Sundaram [mailto:mohan.tux@xxxxxxxxx]
Sent: Monday, September 17, 2007 11:24 AM
To: Raghuvendra Kumar
Subject: Re:  using tc to drop packets based on the diffserc or
tos value


Raghuvendra Kumar wrote:
> Hi Michal,
>
> Thanks for your much needed suggestion.
>
> Actually i have a video Delivey server(suppose it supports 240 simultaneous calls).
> It takes request from various users for video delivery.
>
> Now suppose if i want that after load reaches to 200, i should only allow
> premium users.In order to identify, non- preimum user,i check their diffserv
> value and drop their packets.This helps me to achieve QOS.
>
You can send premium customer traffic thro' a high prio class. This way,
non-premium traffic will always be accorded lower priority and thus
dropped if choke occurs.

TOS marks must work. Another mechanism is to use fwmark in iptables and
classify using mark in tc.

Mohan
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