Netgate SG-1000 microFirewall

Author Topic: Limiter with Burst or similar solution needed  (Read 14607 times)

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Offline jimp

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Re: Limiter with Burst or similar solution needed
« Reply #15 on: June 18, 2013, 11:38:43 am »
so wouldnt it be better to put some description on that page saying burst is actual data and not rate and secondly the rules.limiter file shows me this

Code: [Select]
pipe 1 config  bw 480Kb burst 480Kb
 

pipe 3 config  bw 400Kb burst 400Kb

isnt the burst supposed to be KB and not Kb and also the interface doesnt allow to specify the unit separately for rate and burst

The description could be better, yes. I don't know about the ipfw syntax.
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Offline foxale08

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Re: Limiter with Burst or similar solution needed
« Reply #16 on: June 18, 2013, 01:30:19 pm »
Has anyone been able to make burst work as expected? Speed tests have not shown evidence of the bursting parameter on the child queues in my config. My current assumptions are that either the "pipe_idle_time" is impossibly low as burst values many orders of magnitude higher produce no results and/or the burst only applies to the first packet sent through an idle link. (I took a quick glance at the current dummynet source, I have limited understanding of C/C++ syntax at present.) Some online have suggested changing the kern.hz parameter in /boot/loader.conf (/boot/loader.conf.local). Additionally, would an expire of 1 cause a link to never be considered idle as it is removed so quickly (net.inet.ip.dummynet.expire=1). What do you guys think?

Code: [Select]
pipe 1 config  bw 14Mb burst 80Mb
queue 1 config pipe 1 mask dst-ip6 /128 dst-ip 0xffffffff
queue 2 config pipe 1 mask dst-ip6 /128 dst-ip 0xffffffff
queue 3 config pipe 1 mask dst-ip6 /128 dst-ip 0xffffffff


pipe 2 config  bw 2.5Mb burst 40Mb
queue 4 config pipe 2 mask src-ip6 /128 src-ip 0xffffffff
queue 5 config pipe 2 mask src-ip6 /128 src-ip 0xffffffff
queue 6 config pipe 2 mask src-ip6 /128 src-ip 0xffffffff

*bw values are half of ISP provided bandwidth.

Edit: Burst does work, but I can only prove it at a 'bw' of 25Kb using ping...
« Last Edit: June 18, 2013, 02:38:06 pm by foxale08 »

Offline stephenminta

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Re: Limiter with Burst or similar solution needed
« Reply #17 on: March 22, 2014, 04:53:26 pm »
foxale08 did you ever get any further with this, I am seeing exactly the same results as you with regards to the burst setting.

Thanks

Offline ermal

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Re: Limiter with Burst or similar solution needed
« Reply #18 on: March 24, 2014, 04:14:56 pm »
The burst setting will not be applied unless the queue is congested.

So unless you fill the pipe you will not see the effect of bursting.

Offline stephenminta

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Re: Limiter with Burst or similar solution needed
« Reply #19 on: March 24, 2014, 11:04:05 pm »
Thanks Ermal. Am I correct in saying then that if I use the settings in the attached screen shot each ip address using more than 2mb of bandwidth (i.e. congesting the queue) will be allowed to burst to the max bandwidth available on the interface until it has passed 10mb of data and then it will drop back to the 2mb rate. In real world use should this not mean that if I run a speedtest from say speedtest.net I should see it burst above 2mb then back equally if I run jperf there should be an initial burst followed by a consistent 2mb.

Many thanks   

Offline ermal

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Re: Limiter with Burst or similar solution needed
« Reply #20 on: March 25, 2014, 02:34:47 pm »
It is per session.

So you have to congest the link with bittorrent or similar and then run speed test.
Probably there you will see the burst.

Offline rmssf

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Re: Limiter with Burst or similar solution needed
« Reply #21 on: April 27, 2014, 03:45:33 pm »
Burst setting does not work.
I've set up a limiter with bw 2Mb and 20MB burst, however didnt see any initial burst, bw limited at 2Mb all the time since start.
I wonder if Ermal did any test at all using the burst setting, or have just assumed the other users got it all wrong.

Offline ermal

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Re: Limiter with Burst or similar solution needed
« Reply #22 on: May 02, 2014, 02:20:55 am »
It seems this is getting a trend in this forum about accusing people of implementation.

Good luck with it since you earned my silence.

Offline rmssf

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Re: Limiter with Burst or similar solution needed
« Reply #23 on: June 29, 2014, 11:47:33 pm »
Can't believe no one here can test and verify that the burst setting in LIMITER pipes is NOT working!
Yet the updates keep mentioning this feature...

It is per session.

So you have to congest the link with bittorrent or similar and then run speed test.
Probably there you will see the burst.

Here's the official FreeBSD documentation about this setting, no mention whatsoever about "link congestion":
Quote
burst size
        If the data to be sent exceeds the pipe's bandwidth limit (and
        the pipe was previously idle), up to size bytes of data are
        allowed to bypass the dummynet scheduler, and will be sent as
        fast as the physical link allows. Any additional data will be
        transmitted at the rate specified by the pipe bandwidth. The
        burst size depends on how long the pipe has been idle; the effec-
        tive burst size is calculated as follows: MAX( size , bw * pipe_idle_time).
Instead, it states that there will be a burst only if the pipe was idle (which makes sense), instead of congested.

Note: I'm using pfsense 2.1.4 - i386 version.
« Last Edit: June 30, 2014, 12:07:22 am by rmssf »

Offline mhohman

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Re: Limiter with Burst or similar solution needed
« Reply #24 on: July 27, 2014, 01:42:44 pm »
We are seeing the same issue of the burst parameter being ignored.

100mbit pipe. Limiting to 12mbit per session with a 20 in the burst field. All sessions limited to 12mbit each. I have even tried a 9999 in the burst field with no result. Turning off the limiter I see a full 94mbit.

I really wish this feature worked as advertised it would be a huge win for us.

Offline rmssf

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Re: Limiter with Burst or similar solution needed
« Reply #25 on: July 27, 2014, 01:54:03 pm »
The burst parameter is in bytes transferred, it's not a bandwidth value. You have to put 10000000 for a 10 MB burst at 100 mbps.
We are seeing the same issue of the burst parameter being ignored.

100mbit pipe. Limiting to 12mbit per session with a 20 in the burst field. All sessions limited to 12mbit each. I have even tried a 9999 in the burst field with no result. Turning off the limiter I see a full 94mbit.

I really wish this feature worked as advertised it would be a huge win for us.

Offline mhohman

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Re: Limiter with Burst or similar solution needed
« Reply #26 on: July 27, 2014, 03:01:36 pm »
Unfortunately even setting it to 9999999999999999999999 has no measurable difference.

I am seeing the following when I lookup diag --> limiter info:
Code: [Select]
Limiters:
00001:   6.200 Mbit/s    0 ms burst 1
q131073  50 sl. 0 flows (1 buckets) sched 65537 weight 0 lmax 0 pri 0 droptail
 sched 65537 type FIFO flags 0x1 256 buckets 2 active
    mask:  0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp
 76 ip      10.200.0.194/0             0.0.0.0/0        5      377  0    0   0
218 ip      10.200.0.137/0             0.0.0.0/0       97    18132  0    0   0
00002:  12.000 Mbit/s    0 ms burst 19531250 k
q131074  50 sl. 0 flows (1 buckets) sched 65538 weight 0 lmax 0 pri 0 droptail
 sched 65538 type FIFO flags 0x1 256 buckets 16 active
    mask:  0x00 0xffffffff/0x0000 -> 0x00000000/0x0000

Offline rmssf

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Re: Limiter with Burst or similar solution needed
« Reply #27 on: July 27, 2014, 03:34:06 pm »
Yes, I've tried that also.
But unfortunately it seems no one responsible here seems to notice the problem.

Unfortunately even setting it to 9999999999999999999999 has no measurable difference.

I am seeing the following when I lookup diag --> limiter info:
Code: [Select]
Limiters:
00001:   6.200 Mbit/s    0 ms burst 1
q131073  50 sl. 0 flows (1 buckets) sched 65537 weight 0 lmax 0 pri 0 droptail
 sched 65537 type FIFO flags 0x1 256 buckets 2 active
    mask:  0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp
 76 ip      10.200.0.194/0             0.0.0.0/0        5      377  0    0   0
218 ip      10.200.0.137/0             0.0.0.0/0       97    18132  0    0   0
00002:  12.000 Mbit/s    0 ms burst 19531250 k
q131074  50 sl. 0 flows (1 buckets) sched 65538 weight 0 lmax 0 pri 0 droptail
 sched 65538 type FIFO flags 0x1 256 buckets 16 active
    mask:  0x00 0xffffffff/0x0000 -> 0x00000000/0x0000

Offline coreybrett

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Re: Limiter with Burst or similar solution needed
« Reply #28 on: October 26, 2017, 07:16:25 am »
I've noticed that the burst setting is no longer available on 2.3.4-RELEASE-p1. Will it come back in the future?

Offline grandrivers

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Re: Limiter with Burst or similar solution needed
« Reply #29 on: November 03, 2017, 08:16:24 am »
its not in 2.4.2 betas maybe open a ticket
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