RE: [mpls-linux-general] MPLS and ATM

SourceForge Headquarters 1320 Columbia Street Suite 310 San Diego, CA 92101 +1 (858) 422-6466

Hi Jim,

Okay.  I was taking your example a bit literally.  I'm now using atm0, not
atm1, since:

  root@onc4:~> cat /proc/net/atm/devices
  Itf Type    ESI/"MAC"addr AAL(TX,err,RX,err,drop) ...
    0 ia      00007794577c  0 ( 0 0 0 0 0 )  5 ( 273 0 93 0 0 )

shows the card is at index 0.  Okay.  On the target, I can create a new
labelspace and inbound label (I saved the 0.990 vesion of mplsadm as
mplsadm.new to avoid conflict with the previous version of the tool in a
shared tools directory):

  root@onc4:~> mplsadm.new -L atm0:3
  root@onc4:~> mplsadm.new -A -I atm:0/33:3

  root@onc4:~> cat /proc/net/mpls_labelspace
  lo      0
  teql0   0
  atm0    3

  root@onc4:~> cat /proc/net/mpls_in
  80210003 atm 0/33 3 POP DLV

debug output looks like:

  mpls_add_in_label: enter
  mpls_info_default_in_instruction: enter
  mpls_info_default_in_instruction: exit
  mpls_atm_create_vcc: enter(0,0,33,1)
  mpls_atm_create_vcc: vci 33 <-> 1024 vpi 0 <-> 1
  mpls_atm_create_vcc: create_vcc
  mpls_atm_create_vcc: setting up vcc
  atm_connect (TX: cl 0,bw 0-0,sdu 65535; RX: cl 1,bw 0-0,sdu 65535,AAL 5)
  mpls_atm_create_vcc: exit
  mpls_add_in_label: succeeded creating vcc
  mpls_add_in_label: exit

So far, so good.  Now, on to the source.  First, lets create the outbound
label:

  root@onc2:~> mplsadm.new -A -O atm:0/33:atm0
  Segmentation fault

Oops!  The log showed this right at the top of the oops output:

  Apr  5 16:06:37 onc2 kernel: IA:  SDU size over the configured SDU size
10240

IA is the Interphase adapter.

The processed oops output is:

ksymoops 0.7c on i686 2.4.3.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.3/ (default)
     -m /usr/src/linux/System.map (default)

Warning: You did not tell me where to find symbol information.  I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc.  ksymoops -h explains the options.

CPU:    0
EIP:    0010:[<d083daa3>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010046
eax: 000493e0   ebx: ced80044   ecx: 00000000   edx: 00000000
esi: ced80000   edi: ced51260   ebp: ced3e000   esp: cedc9c48
ds: 0018   es: 0018   ss: 0018
Process mplsadm.new (pid: 833, stackpage=cedc9000)
Stack: ffffffea ced3e000 cfa0a680 00000021 00035a18 00000286 ced51260
cedc9c64
       cedc9c64 00000000 00000246 cedc9c74 cedc9c74 00000000 d083dca9
d083dce1
       ced3e000 00000000 ced3e000 00000000 c01edd70 ced3e000 00000000
00000021
Call Trace: [<d083dca9>] [<d083dce1>] [<c01edd70>] [<c01eddd6>] [<c01ede9d>]
[<c01dfa36>] [<c01dcee7>]
       [<c014f486>] [<c01dc599>] [<c019e269>] [<c01e0a2e>] [<c01e0436>]
[<c01e08b7>] [<c01e06d8>] [<c019508d>]
       [<c01e06d8>] [<c0195cfc>] [<c01b16c8>] [<c01b17f0>] [<d083d0f5>]
[<c019a1cd>] [<c01964cb>] [<c0106daf>]
Code: f7 77 0c 89 c3 b8 01 00 00 00 85 db 0f 44 d8 80 7f 2c 00 74

>>EIP; d083daa3 <[iphase]ia_close+1b3/330>   <=====
Trace; d083dca9 <[iphase]ia_open+89/d8>
Trace; d083dce1 <[iphase]ia_open+c1/d8>
Trace; c01edd70 <atm_do_connect_dev+14c/184>
Trace; c01eddd6 <atm_do_connect+2e/34>
Trace; c01ede9d <atm_connect_vcc+c1/120>
Trace; c01dfa36 <mpls_atm_create_vcc+1ca/244>
Trace; c01dcee7 <mpls_add_out_label+20b/4ac>
Trace; c014f486 <nfs_read_rpcsetup+3a/ec>
Trace; c01dc599 <mpls_rtm_newnhlfe+d/14>
Trace; c019e269 <rtnetlink_rcv+24d/38c>
Trace; c01e0a2e <netlink_data_ready+1a/60>
Trace; c01e0436 <netlink_unicast+296/2dc>
Trace; c01e08b7 <netlink_sendmsg+1df/1f0>
Trace; c01e06d8 <netlink_sendmsg+0/1f0>
Trace; c019508d <sock_sendmsg+81/a4>
Trace; c01e06d8 <netlink_sendmsg+0/1f0>
Trace; c0195cfc <sys_sendto+d0/f0>
Trace; c01b16c8 <ip_rcv+358/390>
Trace; c01b17f0 <ip_rcv_finish+0/210>
Trace; d083d0f5 <[iphase]ia_int+85/94>
Trace; c019a1cd <net_rx_action+125/240>
Trace; c01964cb <sys_socketcall+123/1dc>
Trace; c0106daf <system_call+33/38>
Code;  d083daa3 <[iphase]ia_close+1b3/330>
00000000 <_EIP>:
Code;  d083daa3 <[iphase]ia_close+1b3/330>   <=====
   0:   f7 77 0c                  div    0xc(%edi),%eax   <=====
Code;  d083daa6 <[iphase]ia_close+1b6/330>
   3:   89 c3                     mov    %eax,%ebx
Code;  d083daa8 <[iphase]ia_close+1b8/330>
   5:   b8 01 00 00 00            mov    $0x1,%eax
Code;  d083daad <[iphase]ia_close+1bd/330>
   a:   85 db                     test   %ebx,%ebx
Code;  d083daaf <[iphase]ia_close+1bf/330>
   c:   0f 44 d8                  cmove  %eax,%ebx
Code;  d083dab2 <[iphase]ia_close+1c2/330>
   f:   80 7f 2c 00               cmpb   $0x0,0x2c(%edi)
Code;  d083dab6 <[iphase]ia_close+1c6/330>
  13:   74 00                     je     15 <_EIP+0x15> d083dab8
<[iphase]ia_close+1c8/330>

1 warning issued.  Results may not be reliable.

Cheers!
Jon

> -----Original Message-----
> From: James R. Leu [mailto:jl...@mi...]
> Sent: Wednesday, April 04, 2001 8:27 PM
> To: Earle, Jonathan [CAR:1A31:EXCH]
> Cc: 'Linux MPLS List'
> Subject: Re: [mpls-linux-general] MPLS and ATM
> 
> 
> Hello,
> 
> What is the atm index of your ATM card?
> 
> cat /proc/net/atm/device
> 
> It shows up as the Intf.
> 
> When creating your atm interface (via atmarp -c) the index in the name
> needs to match that of the index from above.
> 
> Example:
> 
> If the atm card index (from /proc/net/atm/device) is 3
> 
> atmarp -c atm3
> 
> I know this is a kind of a ridiculous rule, but due to the nature of
> ATM for Linux it is a requirement.  Someday I'll get a around 
> to re-writing
> the way ATM interfaces are handled on Linux ...
> 
> Let me know if this still doesn't help.
> 
> Jim
> 
> On Wed, Apr 04, 2001 at 05:51:21PM -0400, Jonathan Earle wrote:
> > Hi James,
> > 
> > Setup is as follows:
> > 
> > Interphase 5575 ATM NIC
> > Kernel 2.4.3
> > MPLS v0.990
> > 
> > Basic IP connectivity between the two NICs works fine.  I 
> configure the NICs
> > thusly:
> > 
> > master)
> >        atmsigd -b -m network
> >        atmarpd -b
> >        sleep 2s
> > 
> >        if [ "$adapter" != "atm$anum" ]; then
> >           atmarp -c atm$anum
> >        fi
> > 
> >        ifconfig atm$anum 192.168.1.1 up
> >        sleep 2s
> >        atmarp -s 192.168.1.2 0.0.102
> >        ;;
> >  slave)
> >        atmsigd -b
> >        atmarpd -b
> >        sleep 2s
> > 
> >        if [ "$adapter" != "atm$anum" ]; then
> >           atmarp -c atm$anum
> >        fi
> > 
> >        ifconfig atm$anum 192.168.1.2 up
> >        sleep 2s
> >        atmarp -s 192.168.1.1 0.0.102
> >        ;;
> > 
> > Using the examples in REAME.atm, I can create the labelspace:
> > 
> > root@onc4:~> cat /proc/net/mpls_labelspace
> > lo      0
> > teql0   0
> > atm1    3
> > 
> > But not IN labels:
> > 
> > mpls_add_in_label: enter
> > mpls_info_default_in_instruction: enter
> > mpls_info_default_in_instruction: exit
> > mpls_atm_create_vcc: enter(1,0,33,1)
> > mpls_atm_create_vcc: adev == NULL
> > mpls_add_in_label: failed creating vcc
> > __mpls_del_in_label: enter
> > __mpls_del_in_label: exit
> > mpls_add_in_label: exit
> > 
> > or OUT labels:
> > 
> > mpls_add_out_label: enter
> > mpls_info_default_moi_instruction: enter
> > mpls_info_default_moi_instruction: exit
> > mpls_atm_create_vcc: enter(1,0,33,2)
> > mpls_atm_create_vcc: adev == NULL
> > mpls_add_out_label: failed to create VCC
> > __mpls_del_out_label: enter
> > __mpls_del_out_label: exit
> > mpls_add_out_label: exit
> > 
> > Cheers!
> > Jon
> > 
> > _______________________________________________
> > mpls-linux-general mailing list
> > mpl...@li...
> > http://lists.sourceforge.net/lists/listinfo/mpls-linux-general
> 
> -- 
> James R. Leu
> 