[altq 26] Re: CBQ is not working as expected.

[Kenjiro Cho <kjc@csl.sony.co.jp>]

Bruno,

Are you running both vic and mgen on PC1?  If so, mgen eats up the
processer power.  
RSVP (or CBQ) reserves only network bandwidth; it doesn't reserve CPU
power nor process scheduling.
Try to reserve from PC1 to SPARC and run mgen on PC2.

-Kenjiro

Bruno Borges Rocha <bruno@xavante.etfce.br> said:
>>       Hi,
>>       I'm using ALTQ-1.2 with ISI RSVP rel4.2a4 on 2 FreeBSD-3.1-RELEASE boxes.
>>       RSVP recognizes CBQ on my interfaces. (fxp0 and ed0)
>>       CBQ enable on interface ed0
>>       CBQ enable on interface fxp0, (both with MTU:1500 & 10M on /etc/cbq.conf)

>>       My experiment just like this:
>>  PC1		 	PC2		  SPARC
>> +--------+          +--------+		+---------+
>> |rel4.2a4|          |rel4.2a4|		|SOLARIS7 |
>> |altq-1.2|E--------E|altq-1.2|E--------E|solstice |
>> |FBSD3.1 |  	    |FBSD3.1 |		|RSVP	  |
>> +--------+	 +--+--------+		+-+-------+
>>      ^ 		 |			  |
>>      |		 |			  +---> w/ CBQ Traffic Control.
>>      |		 |
>>      +-----------+---> kernel options enabled:ALTQ,CBQ,RED,FLOWVALVE,LOCALQ

>> E = Ethernet 10Mbps;

>> I do that by typing:

>> mybox# ./rsvpd -D -l63 -d63

>> this give me a rtap prompt. I reserve bandwitdh manually on both machines
>> PC1 <--> SOLARIS using PC2 as a router.

>> I used applications like VIC(uses UDP) and MGEN(SAME), to generate traffic
>> on ports reserved manually by rtap.
>> like:
>> reserved PC1/8990 to PC2/8991 and using same hosts/port to transfer video.

>> When generating traffic w/ MGEN, it's disturbs completelly the video
>> transfers. Making high loss rates (up to 50%) and not respecting the
>> reservation made by rsvp(used to be controlled load [cl])

>> I've read docs/TIPS.txt and see that isn't a good ideia to use CBQ w/ UDP?

>> Is there any chance to make it work ?
>> Or can anyone point my mistake on this ?

>> Thanks,
>> Bruno<>Borges