Rare project developers

[mc36 <>]

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.
> > 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> > I'
> > --
> > Best regards
> > Everson

Attachment: sdn51.pcap.gz
Description: application/gzip

Attachment: 2022-11-05-070139_1920x1080_scrot.png
Description: PNG image