Date: Tue, 21 Jun 2005 22:44:49 +0200 From: Heiner Strauss <heiner@bilch.com> To: Harti Brandt <harti@freebsd.org> Cc: freebsd-atm@freebsd.org Subject: Re: Switched virtual connection Message-ID: <42B87C41.50108@bilch.com> In-Reply-To: <20050621153222.U20063@beagle.kn.op.dlr.de> References: <42B805F6.9050804@bilch.com> <20050621153222.U20063@beagle.kn.op.dlr.de>
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Harti Brandt wrote:
> On Tue, 21 Jun 2005, Heiner Strauss wrote:
>
> Hi,
>
> HS>Im trying to set up a SVC directly to an atm edge switch (3Com SS II with an
> HS>ATM uplink modul). The host has FreeBSD 5.4 and a ForeRunner 155HE card. I
> HS>have 2 Questions:
> HS>
> HS>1. Which of the 3 ATM implementations do I have to use ?
>
> You should use the HARP stack (that is netatm) plus the hatm driver (that
> needs options atm) and the if_harp driver. Something like:
>
> natm_interfaces="hatm0"
>
> plus HARP configuration. See also rc.d/atm[123].
>
> HS>2. Do I need ATMARPD ?
>
> You should google around for HARP. There is somewhere documentation on the
> net. I think, that atmarpd is only needed if you want to synchronize
> several atmarp daemons.
>
> HS>3. Are there examples for SVCs in netgraph/natm/HARP ?
>
> There is some documentation in /usr/share/examples/atm. For the rc.conf
> variables you should refer to the rc files.
>
Ok. I did some homework. I have now :
$ atm show int
Interface Sigmgr State
hatm0 UNI 3.0 INIT
ATM address = 0x47.0005.80.ffe100.0000.0000.0000.0020482e1367.00
Network interfaces: fa0
There is now an UNI 3.0 signal manager and an ATM address. When I plug
in the fiber the machine panics:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x0
fault code = supervisor write, page not present
...
processor eflags = interrupt enabled, resume, IOPL=0
current process = 26 (swi1: net)
trap number = 12
panic: page fault
Uptime 29s
Cannot dump....
I have this in my kernel:
options ADAPTIVE_GIANT # Giant mutex is adaptive.
options NATM
options ATM_CORE #core ATM protocol family
options ATM_IP #IP over ATM support
#options ATM_SIGPVC #SIGPVC signalling manager
#options ATM_SPANS #SPANS signalling manager
options ATM_UNI #UNI signalling manager
# ATM
device hatm
device utopia
device atm
device harp
What do I have to do know ?
> HS>I have googled around and found examples for PVCs, but the switch supports
> HS>only SVCs. Both ends seem to send/receive SONET frames but nothing more:
> HS>
> HS>hatm0: flags=841<UP,RUNNING,SIMPLEX> mtu 9180
> HS> media: ATM Multi-mode/155MBit
> HS> status: active
> HS>fa0: flags=43<UP,BROADCAST,RUNNING> mtu 9180
> HS> ether 00:20:48:2e:13:67
> HS>
> HS>On the switch the Link Status LED is green. At the end I want to build
> HS>something like this:
> HS>
> HS>Telco -- DSL Router -- FreeBSD as a IP/ATM bridge/router or switch -- 3Com
> HS>with ethernet clients
> HS>
> HS>Is this possible or do I need a real ATM switch ?
>
> What do you want the FreeBSD to do here? Should it terminate the pppoa or
> whatever your DLS uses? Or do you want it to transparently connect the DSL
> to the ATM switch on the ATM layer?
>
Not exactly. For the beginning I just want to build a private ATM net.
The FreeBSD host should provide (IP)-services (imap,http,video...) to
the Ethernet VLANs clients at the 3Com switch. The telco DSL Router is
giving me ethernet, maybe it's possible to connect it to a VLAN at the
switch and make the ATM cells available to my private net. But this is
for later. Basicly I want to have some practical expirience with ATM.
> harti
Heiner
--
Heiner Strauss heiner@bilch.com Bilch International Consulting
www.bilch.com Hamburg
Markusstrasse 4
20355 Hamburg Tel.: +49 40 3480667
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