Hi Todd,
Basically it's only with vlan that 10G interface is not working and we are
using the latest driver ixgbe-3.18.7.
In last mail the packet was actually sent without VLAN so there was no issue.
I have tested it more , and the problem reduced to this :
With VLAN the 10G driver is not accepting the vlan tagged packets
unless that vlan is configured on the physical interface, we are using
PF_PACKET sockets here and we don't want to configure VLAN physically on the
interface. No such limitation exists on 1 G driver (igbvf).
Here I have modified the simple program to explain the problem in some more
detail.
It has two programs here , sender and receiver.
Suppose we are sending packets on interface eth0 and receiving on interface
eth1.
Run ethereal on interface eth0 and eth1 .
Run Receiver on one interface as
# ./receiver interface_name
Example :
# ./receiver eth1
Run sender on one interface as
# ./sender interface_name with_vlan (1/0) ( 1(one) will add vlan , 0(zero)
will not).
Example :
# ./sender eth0 1
Now you will be able to observer that on interface eth0 , the ethereal will
show that one arp request is sent with vlan in it , but at the same time you
will receive nothing on eth1, neither on ethereal nor , receiver program will
say anything.
Now just run sender again without vlan as
#./sender eth0 0
Now u will observe that packet is successfully sent and received , we can
capture the packet on eth1 on ethereal and receiver program will also dump the
packet on console.
Thanks & Regards
Vijay Agrawal
-----Original Message-----
From: Fujinaka, Todd [mailto:todd.fujin...@intel.com]
Sent: 30 January 2014 03:25
To: Vijay Agrawal; e1000-de...@lists.sf.net
Subject: RE: [E1000-devel] ixgbe-3.17.3 :VLAN tagged packets does not work when
using PF-PACKET socket
We don't seem to have any issues:
>From the sender:
# ./test eth2
buffer is : FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF 11 11
11 11 11 11 08 06 00 01 08 00 06 04 00 01 11 11 11 11 11 11
11 11 11 11 00 00 00 00 00 00 22 22 22 22 PF_PACKET: ARP request
sent 42 bytes
On receiver:
# tcpdump -i eth2 -xxv
tcpdump: listening on eth2, link-type EN10MB (Ethernet), capture size 65535
bytes
06:24:56.538905 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has
34.34.34.34 tell 17.17.17.17, length 46
0x0000: ffff ffff ffff 1111 1111 1111 0806 0001
0x0010: 0800 0604 0001 1111 1111 1111 1111 1111
0x0020: 0000 0000 0000 2222 2222 0000 0000 0000
0x0030: 0000 0000 0000 0000 0000 0000
Todd Fujinaka
Software Application Engineer
Networking Division (ND)
Intel Corporation
todd.fujin...@intel.com
(503) 712-4565
-----Original Message-----
From: Vijay Agrawal [mailto:vagra...@ixiacom.com]
Sent: Tuesday, January 28, 2014 10:07 PM
To: Fujinaka, Todd; e1000-de...@lists.sf.net
Subject: RE: [E1000-devel] ixgbe-3.17.3 :VLAN tagged packets does not work when
using PF-PACKET socket
Hi Todd,
Just wanted to help you to understand the issue we are facing .
With static VLAN configured on the interface , hardware sends the packet but
vlan is stripped.
With PF_PACKET socket where we are constructing entire Ethernet packet our self
, the packet is dropped by the hardware.
I have attached a simple C program which uses PF_PACKET SOCKET to send one test
ARP packet with VLAN, and you can clearly observe that packet is dropped.
You can compile it with
Sudo make compile
Run it with
./test "interface name (example eth0)"
I hope it will help you to quickly identify the issue , and may be you can
suggest something to fix it or if you can confirm if this is as expected as
per design.
Thanks & Regards
Vijay Agrawal
-----Original Message-----
From: Vijay Agrawal
Sent: 29 January 2014 10:30
To: 'Fujinaka, Todd'; e1000-de...@lists.sf.net
Subject: RE: [E1000-devel] ixgbe-3.17.3 :VLAN tagged packets does not work when
using PF-PACKET socket
Hi Todd,
Thanks a lot for the response.
Can you please explain this a bit more.
When you say you are stripping the VLAN tags , so the packet with VLAN tag
should go out without VLAN tag , but here we observe that no packet is going
out , so it look like the hardware drops the VLAN tag packet, we see no packet
on the ethereal. Can you please explain this ?
Is there any work around solution to work with VLAN? Or with this driver it's
just not possible.
Thanks again for your quick response .
Thanks & Regards
Vijay Agrawal
-----Original Message-----
From: Fujinaka, Todd [mailto:todd.fujin...@intel.com]
Sent: 29 January 2014 02:04
To: Vijay Agrawal; e1000-de...@lists.sf.net
Subject: RE: [E1000-devel] ixgbe-3.17.3 :VLAN tagged packets does not work when
using PF-PACKET socket
Our hardware strips VLAN tags in order to support Data Center Bridging (I think
the details are in 802.1Q for DCB). DCB uses the same offset as VLAN tags and
if we didn't strip the tags we couldn't have interoperability between endpoints
that had DCB enabled and not enabled.
Todd Fujinaka
Software Application Engineer
Networking Division (ND)
Intel Corporation
todd.fujin...@intel.com
(503) 712-4565
-----Original Message-----
From: Vijay Agrawal [mailto:vagra...@ixiacom.com]
Sent: Monday, January 27, 2014 10:02 PM
To: e1000-de...@lists.sf.net
Subject: [E1000-devel] ixgbe-3.17.3 :VLAN tagged packets does not work when
using PF-PACKET socket
Hi ,
We are observing a issue with this driver , we are using PF-Packet sockets for
sending receiving Ethernet packets, but if the packet is Vlan tagged it is not
sent/received on the interface. Neither the packet is seen on the ethereal
capture. Here we are just using PF-PACKET socket and no IP and Vlan is
configured on the physical interface.
The same test if we run on 1 G node it works , so as it seems there is some
limitations with this 10G driver.
Can you please help.
Thanks & Regards
Vijay Agrawal
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