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Hello,
I am testing a RAS solution and I experience some crashes when the L2TP
tunnels grow above 3500. The IPv6 is disabled on the box. With IPv6
enabled the limit is around 1700 (half). Does anyone has a sugesstion
what I should try next ?

total traffic: ~ 100mbps
load averages: ~1.8

Kernel: FreeBSD 8.2-RELEASE
MPD5: mpd-5.5

/boot/loader.conf
net.graph.maxdata=65536
net.graph.maxalloc=65536
kern.ipc.maxpipekva=320000000

/etc/sysctl.conf
net.inet.ip.forwarding=1
kern.maxfiles=65535
net.inet.icmp.icmplim=0
net.inet.ip.fastforwarding=1
kern.ipc.nmbclusters=1280000
kern.ipc.maxsockbuf=128000000
net.graph.maxdgram=10240000
net.graph.recvspace=10240000

--
Best regards,
Adrian Minta MA3173-RIPE
tel. +4.0212.022.660 +4.0726.110.369

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On 6/23/2011 8:55 AM, Adrian Minta wrote:
> Hello,
> I am testing a RAS solution and I experience some crashes when the L2TP
> tunnels grow above 3500. The IPv6 is disabled on the box. With IPv6
> enabled the limit is around 1700 (half). Does anyone has a sugesstion
> what I should try next ?

There are many bug fixes to netgraph in RELENG_8. cvsup to stable as a
start. How much RAM do you have ? i386 or AMD64 ?

---Mike
>
> total traffic: ~ 100mbps
> load averages: ~1.8
>
>
> Kernel: FreeBSD 8.2-RELEASE
> MPD5: mpd-5.5
>
> /boot/loader.conf
> net.graph.maxdata=65536
> net.graph.maxalloc=65536
> kern.ipc.maxpipekva=320000000
>
> /etc/sysctl.conf
> net.inet.ip.forwarding=1
> kern.maxfiles=65535
> net.inet.icmp.icmplim=0
> net.inet.ip.fastforwarding=1
> kern.ipc.nmbclusters=1280000
> kern.ipc.maxsockbuf=128000000
> net.graph.maxdgram=10240000
> net.graph.recvspace=10240000
>

--
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications,
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada http://www.tancsa.com/
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)

On Jun 23, 2011, at 12:55 PM, Adrian Minta wrote:

> Hello,
> I am testing a RAS solution and I experience some crashes when the L2TP tunnels grow above 3500.

I guess you mean sessions, not tunnels.

> The IPv6 is disabled on the box. With IPv6 enabled the limit is around 1700 (half). Does anyone has a sugesstion what I should try next ?

backtraces would be a good start if things persist after what Mike has suggested (updating to stable/8).

/bz

--
Bjoern A. Zeeb You have to have visions!
Stop bit received. Insert coin for new address family.

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> On 6/23/2011 8:55 AM, Adrian Minta wrote:
>> Hello,
>> I am testing a RAS solution and I experience some crashes when the L2TP
>> tunnels grow above 3500. The IPv6 is disabled on the box. With IPv6
>> enabled the limit is around 1700 (half). Does anyone has a sugesstion
>> what I should try next ?
>
> There are many bug fixes to netgraph in RELENG_8. cvsup to stable as a
> start. How much RAM do you have ? i386 or AMD64 ?
>
> ---Mike
>>
>> total traffic: ~ 100mbps
>> load averages: ~1.8
>>
>>
>> Kernel: FreeBSD 8.2-RELEASE
>> MPD5: mpd-5.5
>>
>> /boot/loader.conf
>> net.graph.maxdata=65536
>> net.graph.maxalloc=65536
>> kern.ipc.maxpipekva=320000000
>>
>> /etc/sysctl.conf
>> net.inet.ip.forwarding=1
>> kern.maxfiles=65535
>> net.inet.icmp.icmplim=0
>> net.inet.ip.fastforwarding=1
>> kern.ipc.nmbclusters=1280000
>> kern.ipc.maxsockbuf=128000000
>> net.graph.maxdgram=10240000
>> net.graph.recvspace=10240000
>>
>

Sorry if I miss something, but just started using freebsd, I use mostly
linux.
The server use AMD64 flavor and have 4G of RAM.
RELENG_8 is not the prerelease for 8.0 ? I have 8.2-RELEASE isn't it newer ?

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On 6/23/2011 11:56 AM, Adrian Minta wrote:
>
> Sorry if I miss something, but just started using freebsd, I use mostly
> linux.
> The server use AMD64 flavor and have 4G of RAM.
> RELENG_8 is not the prerelease for 8.0 ? I have 8.2-RELEASE isn't it newer ?
>

Hi,
RELENG_8 is the present state of what is in the tree and will
eventually make 8.3-RELEASE. Its called STABLE, but that means no ABI
changes to the branch. But you can generally think of it being "stable"
as well in that the goal is to have less bugs then previous versions.

Have a read through

http://www.freebsd.org/doc/handbook/updating-upgrading.html

Then the broad steps to upgrade your source,
cp /usr/share/examples/cvsup/stable-supfile /tmp

edit the file in tmp and make sure
the line reads as follows for the release

*default release=cvs tag=RELENG_8

csup -g -L2 -h cvsup10.freebsd.org /tmp/stable-supfile

This will pull down all the source for the RELENG_8, the most uptodate
source tree and put it in /usr/src from the cvsup mirror
cvsup10.freebsd.org. Where you see references to cvsup (the client app)
use instead csup which will do everything you need.

then
cd /usr/src;make -j2 buildworld > b.out;make -j2 buildkernel > b.out.k

If all goes well, you will see in b.out at the end

--------------------------------------------------------------
>>> World build completed on Wed Jun 22 07:10:37 EDT 2011
--------------------------------------------------------------

and

--------------------------------------------------------------
>>> Kernel build for GENERIC completed on Wed Jun 22 07:18:49 EDT 2011
--------------------------------------------------------------

Then follow the steps to install the kernel and world

http://www.freebsd.org/doc/handbook/makeworld.html

---Mike

--
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications,
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada http://www.tancsa.com/
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> *default release=cvs tag=RELENG_8
>
>
> csup -g -L2 -h cvsup10.freebsd.org /tmp/stable-supfile
>
> This will pull down all the source for the RELENG_8, the most uptodate
> source tree and put it in /usr/src from the cvsup mirror
> cvsup10.freebsd.org. Where you see references to cvsup (the client app)
> use instead csup which will do everything you need.
>
> then
> cd /usr/src;make -j2 buildworld > b.out;make -j2 buildkernel > b.out.k
>
> If all goes well, you will see in b.out at the end
>
> --------------------------------------------------------------
>>>> World build completed on Wed Jun 22 07:10:37 EDT 2011
> --------------------------------------------------------------
>
> and
>
> --------------------------------------------------------------
>>>> Kernel build for GENERIC completed on Wed Jun 22 07:18:49 EDT 2011
> --------------------------------------------------------------
>
> Then follow the steps to install the kernel and world
>
> http://www.freebsd.org/doc/handbook/makeworld.html
>
>
> ---Mike
>

Thank you !
My server is stable now with 3572 sessions.
The issue now seems to be the rate of new connections/sec. When a new "ng"
device is created some scripts are run (like /etc/pccard_ether ). The
scripts drive the CPU to 100% and sometimes new connections fail to
establish.

I guess I have to find a bigger CPU now :)

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On 6/23/2011 1:37 PM, Adrian Minta wrote:
>> *default release=cvs tag=RELENG_8
>> Then follow the steps to install the kernel and world
>>
>> http://www.freebsd.org/doc/handbook/makeworld.html
>
> Thank you !
> My server is stable now with 3572 sessions.
> The issue now seems to be the rate of new connections/sec. When a new "ng"
> device is created some scripts are run (like /etc/pccard_ether ). The
> scripts drive the CPU to 100% and sometimes new connections fail to
> establish.
>
> I guess I have to find a bigger CPU now :)

Thats great to hear! Is that with ivp6 enabled or disabled ?

---Mike

--
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications,
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada http://www.tancsa.com/
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)

> On 6/23/2011 1:37 PM, Adrian Minta wrote:
>>> *default release=cvs tag=RELENG_8
>>> Then follow the steps to install the kernel and world
>>>
>>> http://www.freebsd.org/doc/handbook/makeworld.html
>>
>> Thank you !
>> My server is stable now with 3572 sessions.
>> The issue now seems to be the rate of new connections/sec. When a new
>> "ng"
>> device is created some scripts are run (like /etc/pccard_ether ). The
>> scripts drive the CPU to 100% and sometimes new connections fail to
>> establish.
>>
>> I guess I have to find a bigger CPU now :)
>
>
> Thats great to hear! Is that with ivp6 enabled or disabled ?
>
> ---Mike
>

I left him disabled because I don't need it anyway.

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Oops i spoke too soon ...
The system is stable without hyperthreading. With hyperthreading activated
i't freezes again.

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On 6/23/2011 3:18 PM, Adrian Minta wrote:
> Oops i spoke too soon ...
> The system is stable without hyperthreading. With hyperthreading activated
> i't freezes again.
>

I also run with

devd_enable="NO"

in /etc/rc.conf
and
in /etc/syctl.conf
kern.random.sys.harvest.ethernet=0

Does it actually freeze or panic and crash ?

---Mike

--
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications,
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada http://www.tancsa.com/
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)

Try:
net.inet.ip.fastforwarding = 0
net.isr.bindthreads = 1
net.isr.direct = 0
net.isr.direct_force = 0

--
Rozhuk Ivan

> -----Original Message-----
> From: owner-freebsd- [mailto:owner-freebsd-
> ] On Behalf Of Mike Tancsa
> Sent: Friday, June 24, 2011 4:56 AM
> To: Adrian Minta
> Cc: freebsd-
> Subject: Re: FreeBSD 8.2 and MPD5 stability issues
>
> On 6/23/2011 3:18 PM, Adrian Minta wrote:
> > Oops i spoke too soon ...
> > The system is stable without hyperthreading. With hyperthreading
> activated
> > i't freezes again.
> >
>
> I also run with
>
> devd_enable="NO"
>
> in /etc/rc.conf
> and
> in /etc/syctl.conf
> kern.random.sys.harvest.ethernet=0
>
> Does it actually freeze or panic and crash ?
>
>
> ---Mike
>
>
>
>
> --
> -------------------
> Mike Tancsa, tel +1 519 651 3400
> Sentex Communications,
> Providing Internet services since 1994 www.sentex.net
> Cambridge, Ontario Canada http://www.tancsa.com/
> _______________________________________________
> freebsd- mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-net
> To unsubscribe, send any mail to "freebsd-net-"

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On 6/23/2011 4:17 PM, wrote:
>
> Try:
> net.inet.ip.fastforwarding = 0
> net.isr.bindthreads = 1
> net.isr.direct = 0
> net.isr.direct_force = 0

If net.isr.direct is disabled, does setting net.isr.bindthreads do
anything ? Also, why disable the fastforwarding ?

---Mike

--
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications,
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada http://www.tancsa.com/
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)

net.inet.ip.fastforwarding
- double check incoming packet, if: dst = this host / multicast / contain options
- all packets processing by one cpu core

This option is good for one cpu core routers.

--
Rozhuk Ivan

> -----Original Message-----
> From: Mike Tancsa [mailto:]
> Sent: Friday, June 24, 2011 5:40 AM
> To:
> Cc: 'Adrian Minta'; freebsd-
> Subject: Re: FreeBSD 8.2 and MPD5 stability issues
>
> On 6/23/2011 4:17 PM, wrote:
> >
> > Try:
> > net.inet.ip.fastforwarding = 0
> > net.isr.bindthreads = 1
> > net.isr.direct = 0
> > net.isr.direct_force = 0
>
> If net.isr.direct is disabled, does setting net.isr.bindthreads do
> anything ? Also, why disable the fastforwarding ?
>
> ---Mike
>
>
>
> --
> -------------------
> Mike Tancsa, tel +1 519 651 3400
> Sentex Communications,
> Providing Internet services since 1994 www.sentex.net
> Cambridge, Ontario Canada http://www.tancsa.com/

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)
On 6/23/2011 5:47 PM, wrote:
>
> net.inet.ip.fastforwarding
> - double check incoming packet, if: dst = this host / multicast / contain options
> - all packets processing by one cpu core
>
> This option is good for one cpu core routers.

Thanks, I didnt know that. And the netisr option ? Have you found that
to be buggy ?

---Mike

>
>
> --
> Rozhuk Ivan
>
>
>
>> -----Original Message-----
>> From: Mike Tancsa [mailto:]
>> Sent: Friday, June 24, 2011 5:40 AM
>> To:
>> Cc: 'Adrian Minta'; freebsd-
>> Subject: Re: FreeBSD 8.2 and MPD5 stability issues
>>
>> On 6/23/2011 4:17 PM, wrote:
>>>
>>> Try:
>>> net.inet.ip.fastforwarding = 0
>>> net.isr.bindthreads = 1
>>> net.isr.direct = 0
>>> net.isr.direct_force = 0
>>
>> If net.isr.direct is disabled, does setting net.isr.bindthreads do
>> anything ? Also, why disable the fastforwarding ?
>>
>> ---Mike
>>
>>
>>
>> --
>> -------------------
>> Mike Tancsa, tel +1 519 651 3400
>> Sentex Communications,
>> Providing Internet services since 1994 www.sentex.net
>> Cambridge, Ontario Canada http://www.tancsa.com/
>
>
>

--
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications,
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada http://www.tancsa.com/
_______________________________________________
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)
After recompilation with "*default release=cvs tag=RELENG_8" and pooling
disables the system still crashes around 4200 sessions. The server has a
xeon E5520 CPU and 4G of ram. Here is the crash on the screen:
http://img232.imageshack.us/img232/6751/crashm.png

$uname -a
FreeBSD lns 8.2-STABLE FreeBSD 8.2-STABLE #2: Sat Jun 25 23:50:06 EEST
2011 gygy@lns:/usr/obj/usr/src/sys/MYKERNELv3 amd64

/boot/loader.conf:

net.graph.maxdata=65536
net.graph.maxalloc=65536
kern.ipc.maxpipekva=320000000
#I wave 4 cores
net.isr.bindthreads=4
net.isr.maxthreads=1
net.isr.defaultqlimit=4096

/etc/sysctl.conf:

net.inet.ip.forwarding=1
kern.maxfiles=65535
net.inet.ip.intr_queue_maxlen=8192
net.inet.icmp.icmplim=0
kern.ipc.nmbclusters=1280000
kern.ipc.maxsockbuf=128000000
net.graph.maxdgram=10240000
net.graph.recvspace=10240000
kern.random.sys.harvest.ethernet=0
net.isr.direct=1
net.isr.direct_force=0

Kernel GENERIC plus:

#options DEVICE_POLLING
options HZ=1000
options NETGRAPH
options NETGRAPH_PPPOE
options NETGRAPH_SOCKET
options NETGRAPH_CISCO
options NETGRAPH_ECHO
options NETGRAPH_FRAME_RELAY
options NETGRAPH_HOLE
options NETGRAPH_KSOCKET
options NETGRAPH_LMI
options NETGRAPH_RFC1490
options NETGRAPH_TTY
options NETGRAPH_ASYNC
options NETGRAPH_BPF
options NETGRAPH_ETHER
options NETGRAPH_IFACE
options NETGRAPH_L2TP
options NETGRAPH_MPPC_ENCRYPTION
options NETGRAPH_PPP
options NETGRAPH_PPTPGRE
options NETGRAPH_TEE
options NETGRAPH_UI
options NETGRAPH_VJC

options ALTQ
options ALTQ_CBQ
options ALTQ_RED
options ALTQ_RIO
options ALTQ_HFSC
options ALTQ_PRIQ
# options ALTQ_NOPCC

device pf
device pflog
device pfsync
device gre

device tap
device hme

# Bridging
device if_bridge
device lagg

options IPSTEALTH
options ZERO_COPY_SOCKETS

options NETGRAPH_DEBUG
options GDB
options DDB
options KDB_UNATTENDED

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