Re: HTB performance, and debbuging

["Žilvinas Vaičkus" <zilvinas.v@kis.lt>]

On 03/05/2013 01:56 PM, Benjamin Kiessling wrote:
> Hi,
>
> On 2013.03.05 08:27:41 +0200, Žilvinas Vaičkus wrote:
>> Hi list,
>>
>> I have two traffic shaping servers, on Linux Centos 5.5
>> (2.6.18-194.32.1.el5) with HTB. In these servers are 2 gigabit NIC's and
>> running script which generates two HTB class'es per ip, one for http and
>> icmp, and another class for other ports. These class'es have different
>> bandwidth rate. Each server serves about 5000 IP's, so each server have
>> about 10000 class'es and about 40000 filters (4 filters per class), and all
>> IP's are hashed with hashing tables.I am not sure that all my ip's are
>> shaped. When i look to default class with "tc -s class show dev" sometimes
>> default class traffic goes up, so there is asumtion that some of ip's are
>> not shaped.
>>
>> 1. First question ist there any way to check which ip's go trough default
>> HTB class ?
> It would be possible to mirror traffic reaching the default class to an
> ifb like this:
>
> tc filter add dev eth0 parent 1:defaultclass protocol ip priority 10 u32 \
> match u32 0 0 flowid 1: action mirred egress mirror dev ifb0
>
> Then just run a tcpdump on ifb0.
>
> Regards,
> Ben
Thank you for the reply Benhamin.

Ok so simple example i have these HTB rules:

eth2 - internet
eth0 - lan
default class for eth0 are 2:16 and if I add filter (last line) all 
traffic which arive in that class will be mirrored to ifb0 correct ?

-------------------------------------------------------------------------------------------------------------
qdisc replace dev eth2 root handle 1: htb default 12
qdisc replace dev eth0 root handle 2: htb default 16

class add dev eth2 parent 1:0 classid 1:12 htb rate 995Mbit ceil 995Mbit
class add dev eth0 parent 2:0 classid 2:16 htb rate 995Mbit ceil 995Mbit

class add dev eth2 parent 1:0 classid 1:64 htb rate 5024kbit
class add dev eth2 parent 1:0 classid 1:65 htb rate 124kbit

         filter add dev eth2 parent 1:0 protocol ip prio 100 u32 match 
ip src 10.42.1.24 match ip icmp_type 0x08 0xff flowid 1:64
         filter add dev eth2 parent 1:0 protocol ip prio 100 u32 match 
ip src 10.42.1.24 match ip dport 80 0xffff flowid 1:64
         filter add dev eth2 parent 1:0 protocol ip prio 100 u32 match 
ip src 10.42.1.24 match ip dport 443 0xffff flowid 1:64
         filter add dev eth2 parent 1:0 protocol ip prio 100 u32 match 
ip src 10.42.1.24 match ip dport 33434 0xff80 flowid 1:64
         filter add dev eth2 parent 1:0 protocol ip prio 100 u32 match 
ip src 10.42.1.24 match ip dport 0 0x0000 flowid 1:65

class add dev eth0 parent 2:0 classid 2:64 htb rate 5024kbit
class add dev eth0 parent 2:0 classid 2:65 htb rate 124kbit

         filter add dev eth0 parent 2:0 protocol ip prio 100 u32 match 
ip dst 10.42.1.24 match ip icmp_type 0x00 0xff flowid 2:64
         filter add dev eth0 parent 2:0 protocol ip prio 100 u32 match 
ip dst 10.42.1.24 match ip sport 80 0xffff flowid 2:64
         filter add dev eth0 parent 2:0 protocol ip prio 100 u32 match 
ip dst 10.42.1.24 match ip sport 443 0xffff flowid 2:64
         filter add dev eth0 parent 2:0 protocol ip prio 100 u32 match 
ip dst 10.42.1.24 match ip sport 33434 0xff80 flowid 2:64
         filter add dev eth0 parent 2:0 protocol ip prio 100 u32 match 
ip dst 10.42.1.24 match ip sport 0 0x0000 flowid 2:65
----------------------------------------------------------------------------------------------------------------
filter add dev eth0 parent 2:16 protocol ip priority 10 u32 match u32 0 
0 flowid 1: action mirred egress mirror dev ifb0