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Re: [rare-dev] RES: Experiment of polka for SC2022


Chronological Thread 
  • From: mc36 <>
  • To: , Marcos Felipe Schwarz <>, Frédéric LOUI <>, "Rafael S. Guimaraes" <>
  • Cc: Everson Borges <>
  • Subject: Re: [rare-dev] RES: Experiment of polka for SC2022
  • Date: Tue, 8 Nov 2022 07:15:28 +0100

hi,
the ping works now through the polka tunnel as expected:

AMS0001#ping 30.1.15.2 vrf CORE source tunnel115
pinging 30.1.15.2, src=30.1.15.1, vrf=CORE, cnt=5, len=64, df=false,
tim=1000, gap=0, ttl=255, tos=0, sgt=0, flow=0, fill=0, alrt=-1, sweep=false,
multi=false
!!!!!
result=100.0%, recv/sent/lost/err=5/5/0/0, took 1294, min/avg/max/dev
rtt=257/257/258/0.1, ttl 255/255/255/0.0, tos 0/0.0/0/0.0
AMS0001#

moreover i can see the packets passing through sao and arriving to mia all
polka encapped:

RARE-FREERTR-MIA0001#show interfaces sdn1.1779 ethertypes
packet byte
type value handler tx rx drop tx rx drop
ethtyp 0000 null 0 0 0 0 0 0
ethtyp 0800 ip4 19 19 0 2254 2242 0
ethtyp 0806 arp4 0 0 0 0 0 0
ethtyp 86dd ip6 31 31 0 3949 3829 0
ethtyp 8842 polka 1109 1109 0 1256497 1256497 0
ethtyp 8847 mplsUni 0 0 0 0 0 0
ethtyp 8848 mplsMulti 0 0 0 0 0 0
ethtyp 88cc lldp 0 0 0 0 0 0

RARE-FREERTR-MIA0001#

thanks,
cs



On 11/8/22 07:02, Marcos Felipe Schwarz wrote:
Hi all,

AMS-SAO now using Bella link. Please try again.
If the problem persists I'll try to dissect the packets on each hop with
Everson.

Regards,

Marcos Schwarz

-----Mensagem original-----
De: Fr d ric LOUI <>
Enviada em: s bado, 5 de novembro de 2022 10:15
Para: Rafael S. Guimaraes <>
Cc: ; Everson Borges <>; Marcos
Felipe Schwarz <>
Assunto: Re: [rare-dev] Experiment of polka for SC2022

Had a quick sync with Marcos.

We will try to switch to another circuit between AMS and SAO.
Once established it should be rendered in the GP4L (world map panel)

Cheers.
Frederic

Le 5 nov. 2022 17:06, Rafael S. Guimaraes <> a crit :

Hi Csaba, sorry for my late reply!

Yesterday, we observed the same issue happening in the PCAP file, the packets
coming with Ethertype as 0x0000 and the routeID 0x800489e7. TBH, we did not
know what was going on...thanks for answering and let's see if it is
something happening between AMS and SAO. I am attaching the pcap file that we
used.

Best regards,
Rafael Guimaraes

On Sat, 5 Nov 2022 at 03:03, mc36 <> wrote:
finally i got an idea on how to have the pcap, attached...
as you can see, the packets somehow arrive with ethertype=0x0000

MS0001#show polka routeid tunnel115
mode routeid
hex 00 00 00 00 00 00 00 00 00 00 00 00 80 04 89 e7
poly 10000000000001001000100111100111 [..]

interestingly, the polka coefficient is somehow present in the packet...

fl: what transit do we have in between ams and sao that can rewrite the
ethertype???
br,
cs

On 11/5/22 06:52, mc36 wrote:
hi,
a strange thing is going on here...

i ping flooded into your tunnel by the following:
AMS0001#ping 30.1.15.2 vrf CORE size 1111 repeat 1111111 tim 11

then i verified if it exits the switch as polka:
AMS0001#show interfaces sdn3.1916 ethertypes | include polka
ethtyp 8842 polka 16939 0 0 19189793 0 0

AMS0001#
it increases as i repeatedly issue the command....

but i get no polka packet at the sao switch:
SAO0021#show interfaces sdn51.459 ethertypes info
userReader.cmdEnter:userReader.java:1032 command SAO0021#show interfaces
sdn51.459 ethertypes from telnet tunnel123 22222 -> 172.16.11.16 50016
packet byte
type value handler tx rx drop tx rx drop
ethtyp 0000 null 0 2626139 0 0 313913310 0
ethtyp 0800 ip4 30943 30770 0 3460858 3770587 0
ethtyp 0806 arp4 147 146 0 4410 6424 0
ethtyp 86dd ip6 40624 39721 0 4909863 5773324 0
ethtyp 8842 polka 0 0 0 0 0 0
ethtyp 8847 mplsUni 0 0 0 0 0 0
ethtyp 8848 mplsMulti 0 0 0 0 0 0
ethtyp 88cc lldp 876 0 0 134028 0 0

SAO0021#
moreove the null increases here, which is an indicator of the unknown
ethertype....
that is, my suspect here is the link between the two switches...

i did a packet capture on the intreface but i found no way to get the file...
can you please grab the /sdn51.459.pcap file from sao0021 and attach it here?
thanks,
cs


On 11/4/22 23:57, Everson Borges wrote:
Hi All,

We have a problem when sending traffic using the polka tunnel, if someone can
help us, that would be great.

image.png

We are sending Traffic from the DTN-AMS-bm6(10.1.101.101) host via the polka
tunnel (in blue), to DTN-OX(10.0.15.2), but we are facing the following issue:
- As shown below in the figure the packets have been dropped at the switch
sao0001 in the interface sdn51.459. The switch ams0001 forwards according to
the traffic.

image.png


All the configurations are available in p4lab.
%3CmxGraphModel%3E%3Croot%3E%3CmxCell%20id%3D%220%22%2F%3E%3CmxCell
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3E%3C%2FmxGraphModel%3
I'
--
Best regards
Everson
<sdn51.459.pcap>




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