Hello,
I want to use the latest VPP, instead of 17.10. The latest ( 18.10 ) version
pppoe plugin is not working correctly.
The PADI packets are successfully sent to the cp interface, but it is not
creating and pppoe fib, due to which the PADO packets are being dropped.
Packet 1
02:34:23:456994: virtio-input
virtio: hw_if_index 3 next-index 4 vring 0 len 63
hdr: flags 0x00 gso_type 0x00 hdr_len 0 gso_size 0 csum_start 0
csum_offset 0 num_buffers 1
02:34:23:457015: ethernet-input
PPPOE_DISCOVERY: e6:b1:bd:65:91:c1 -> 52:54:00:79:64:b9
02:34:23:457031: error-drop
ethernet-input: l3 mac mismatch
vpp# show pppoe fib
no pppoe fib entries
Is this behavior intentional? Do I need to configure anything else other
than the cp interface?
-----Original Message-----
From: vpp-dev@lists.fd.io [mailto:vpp-dev@lists.fd.io] On Behalf Of
alp.ars...@xflowresearch.com
Sent: Wednesday, October 24, 2018 2:51 PM
To: 'Ni, Hongjun'; vpp-dev@lists.fd.io
Subject: Re: [vpp-dev] PPPoE plugin documentation/support
Its working fine with VPP 17.10. I can see that a pppoe fib is created as
soon as the 1st PADI request arrives, which sets up the reverse path.
However, in VPP 18.07 & 18.10 there is no fib entry created and the PADO
packets are being dropped.
The slides don't show a trace for the PADO replies.
-----Original Message-----
From: vpp-dev@lists.fd.io [mailto:vpp-dev@lists.fd.io] On Behalf Of Ni,
Hongjun
Sent: Wednesday, October 24, 2018 1:38 PM
To: alp.ars...@xflowresearch.com; vpp-dev@lists.fd.io
Subject: Re: [vpp-dev] PPPoE plugin documentation/support
Hi Alp Arslan,
Please see below slides for more details. There is some packet trace for
your reference.
https://schd.ws/hosted_files/onsna18/cf/Accelerated%20Open%20Source%20vBRAS%
20Solution%20Based%20on%20OpenBRAS%20and%20VPP%26DPDK.PPTX
Thanks,
Hongjun
-----Original Message-----
From: vpp-dev@lists.fd.io [mailto:vpp-dev@lists.fd.io] On Behalf Of
alp.ars...@xflowresearch.com
Sent: Wednesday, October 24, 2018 2:49 PM
To: Ni, Hongjun <hongjun...@intel.com>; vpp-dev@lists.fd.io
Subject: Re: [vpp-dev] PPPoE plugin documentation/support
Dell - Internal Use - Confidential
Dear Hongjun,
I was able to correctly set up the cp interface, my mistake as I was giving
the wrong interface index.
Now the PADI packets are passed to cp interface.
I started a pppoe-server on the Linux side (tap0) interface, but VPP is
dropping the PADO packets.
Adding a trace on the virtio-input shows this:
00:04:07:498195: virtio-input
virtio: hw_if_index 2 next-index 4 vring 0 len 71
hdr: flags 0x00 gso_type 0x00 hdr_len 0 gso_size 0 csum_start 0
csum_offset 0 num_buffers 1
00:04:07:498204: ethernet-input
PPPOE_DISCOVERY: f6:a0:85:84:98:e6 -> 3c:fd:fe:25:e6:20
00:04:07:498209: error-drop
ethernet-input: l3 mac mismatch
The destination MAC address belongs to the pppoe-client, that's connected to
the 10G interface. However, VPP doesn't seem to know where to forward the
PADO replies.
Also there are no entries in the pppoe fib for this client. Can you please
help me with this one? Please let me know if you need any more information.
Regards,
Alp Arslan
-----Original Message-----
From: vpp-dev@lists.fd.io [mailto:vpp-dev@lists.fd.io] On Behalf Of Ni,
Hongjun
Sent: Tuesday, October 23, 2018 1:07 PM
To: alp.ars...@xflowresearch.com; vpp-dev@lists.fd.io
Subject: Re: [vpp-dev] PPPoE plugin documentation/support
Hi Alp Arslan,
To make tap_cli work, you need to revert the code as per this patch:
https://gerrit.fd.io/r/#/c/9467/
Thanks,
Hongjun
-----Original Message-----
From: vpp-dev@lists.fd.io [mailto:vpp-dev@lists.fd.io] On Behalf Of
alp.ars...@xflowresearch.com
Sent: Tuesday, October 23, 2018 4:01 PM
To: Ni, Hongjun <hongjun...@intel.com>; vpp-dev@lists.fd.io
Subject: Re: [vpp-dev] PPPoE plugin documentation/support
Dell - Internal Use - Confidential
Dear Hongjun,
Thanks for the reply.
I am using the VPP version 18.07. If the tap_cli is still present, can you
please point me towards what could be the problem with the existing plugin.
I would like to see this one working a little bit, before starting to look
into tapv2.
Regards,
Alp Arslan
-----Original Message-----
From: Ni, Hongjun [mailto:hongjun...@intel.com]
Sent: Tuesday, October 23, 2018 12:51 PM
To: alp.ars...@xflowresearch.com; vpp-dev@lists.fd.io
Subject: RE: [vpp-dev] PPPoE plugin documentation/support
Hi Alp Arslan,
Since tap_cli code is going to be deprecated in favour of tapv2.
I suggest you leverage tapv2, and also need some rework for PPPoE plugin.
Thanks,
Hongjun
-----Original Message-----
From: vpp-dev@lists.fd.io [mailto:vpp-dev@lists.fd.io] On Behalf Of
alp.ars...@xflowresearch.com
Sent: Tuesday, October 23, 2018 3:08 PM
To: vpp-dev@lists.fd.io
Subject: [vpp-dev] PPPoE plugin documentation/support
Dear All,
I am trying to evaluate the support of pppoe in vpp. However, I am facing
some issues, here is my startup conf file.
unix {
nodaemon
log /var/log/vpp/vpp.log
full-coredump
cli-listen /run/vpp/cli.sock
gid vpp
}
api-trace {
on
}
api-segment {
gid vpp
}
socksvr {
default
}
cpu {
main-core 1
corelist-workers 2,4,3,5
}
dpdk {
dev 0000:05:00.1
uio-driver vfio-pci
socket-mem 2048,2048
}
plugins {
plugin default { enable}
}
tuntap {
enable
ethernet
name newtap
}
After that I run the following commands:
vpp# set interface state TenGigabitEthernet5/0/1 up vpp# set interface state
local0 up
Now at this point if I try to connect from the pppoe client, I can see three
PADI request reaching VPP, and VPP trying to forward them at local0
interface.
To forward this traffic to the tap port instead, I use this command.
vpp# create pppoe cp cp-if-index 2
The help and the documentation for this command show this "create pppoe cp
if-name <intfc> [del]", which doesn't work.
Now at this moment, I was expecting the VPP to forward the PADI request to
tuntap-0 interface, but I don't see anything in the VPP counters, nor by
using tcpdump on interface "newtap" which is the kernel facing side of
"tuntap-0" interface.
My question is, Is my approach correct? Are the PADI requests forwarded to
the tuntap-0 interface? If not where do they go? I cannot find any good
documentation on this anywhere.
Any help regarding this would be highly appreciated.
Regards,
Alp Arslan
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