03-28-2012 02:02 AM - edited 03-07-2019 05:49 AM
Hello,
I have a problem with siemens industrial profinet apparatous and my Cat2960.
Siemens host can be pinged without any problem but they are not able to do any other kind of traffic.
If i look at the interface I can find that all ingress packet are UNKNOWN DROPPED.
I found a document where si explained that "probably" siemens host are using packet with 802.1p header and vlan 0.
I tried the following tests:
1) port in access mode - failed
2) port in trunk mode with native vlan - failed
3) port in access mode with voice vlan - failed
4) port in acess-mode with voice vlan dot1p - failed
Did you never had such this problem?
can anybody help me?
Thanks
Johnny
04-04-2012 09:27 AM
Hello,
Have you attempted to get a sniffer capture of this traffic to see what the packets look like? Where are you seeing the drops? Can you paste the output?
Fabienne
TAC
11-25-2015 01:33 AM
Hi,
we usually get this also running with adding the same voice vlan to that port and all ports which use profinet, like falk already posted:
interface GigabitEthernet1/0/1
switchport access vlan 61
switchport mode access
switchport voice vlan 61
Did you already try?
04-27-2012 12:29 AM
hello,
example:
interface GigabitEthernet1/0/1
switchport access vlan 61
switchport mode access
switchport voice vlan 61
it is usually the solution
regards
falk
11-15-2012 09:38 PM
Recently configured this.
Use the following
switchport mode trunk
switchport trunk encapsulation dot1q // if default is not dot1q
switchport trunk native vlan
Thanks,
Dev
01-11-2018 03:25 AM
Hi my friend. Did you solve this problem?
11-19-2015 09:46 AM
Hello.
I'm facing the same problem these days.
I know this is an old problem and probably you forgot it but, in any case, did you find any solution for the problem? And if yes, what is it?
Regards,
Gabriele
03-18-2016 04:59 AM
Hi, actually it is not that old, since it just happened to me.
In our case the solution was to remove the L3 interface that we had in the same VLAN. It makes absolutelly no sense... but it worked. The interface is configured as access, and there is no SVI for that VLAN.
Did you find some alternative (and explainable) solution?
Does anyone know if the traffic generated/exchanged between the Profinet devices is Multicast or unicast?
Regards,
Francisco
09-27-2016 09:16 AM
Hello,
I've had a similar problem these days: a customer was using a Siemens software in order to discover the Siemens devices on the vlan. The discovery was successful with a simple unmanaged switch, but with a Cat2960X it was partially failing (only some devices were discovered). After conducting a troubleshooting we figured out that the packets were too small, so we used a trick to make them bigger. Instead on configuring the interfaces as access we have created some trunks, and this solved the problem.
Old configuration:
switchport mode access
switchport access vlan XXX
New configuration:
switchport mode trunk
switchport trunk native vlan XXX
Voillà! Problem solved!
Maybe one day this can help someone :)
Best regards,
Matteo
09-30-2022 07:19 AM
Ciao Matteo, sei sei ancora attivo sulla community ? Mi potresti contattare scrivendomi a michele.bertolaso@pedrollogroup.com .
Ho una problematica molto simile che non riesco a risolvere.
01-11-2018 03:24 AM
Hello,
Do you solved this problem?
01-11-2018 03:27 AM
Hi guys, someone has solved this problem?
01-24-2019 08:20 AM - edited 01-24-2019 08:21 AM
This is my working configuration on a Catalyst 2960-X with Siemens devices and the Ethernet based protocol:
#sh ru int g1/0/1 Building configuration... Current configuration : 191 bytes ! interface GigabitEthernet1/0/1 switchport access vlan 40 switchport mode access switchport voice vlan 102 no mdix auto spanning-tree portfast edge spanning-tree bpduguard enable end
You can probably leave the last three lines away, but we have them for various reasons always in our configuration.
The most important part is the voice vlan line. That will fix the "broken" broadcast replies of the Siemens devices, so that they can be found and used with the Broadcast function.
05-15-2019 06:07 AM - edited 05-20-2019 12:46 AM
Hello all,
I had the same problem and for to arrive work profinet on Catalyst 2960, 2960S/X, 3750 and 3850 I did this :
Enjoy.
Best regards.
05-15-2019 06:41 AM
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