I am going through a difficulty with community connectivity to a Profinet PLC machine and would admire some assist. This is the setup:
- PC ↔ DLINK Swap ↔ Cisco C2960 ↔ SCALANCE X108 ↔ PLC System
- Solely Managed change is the Cisco Swap, All different switches are Unmanaged
- SCALANCE X108 is an Industrial Unmanaged change.
- The PLC is assigned an IP tackle of 192.168.101.9 and is configured
with Profinet. - Each the PC and the port connecting to the SCALANCE X108 are
configured in VLAN 101. The Swap has a number of different VLANs for different IT infrastructure.
Concern:
- I can efficiently ping and scan the Profinet PLC in TIA Portal
when it is related on to the DLINK Swap. - I can ping the 2 PLC gadgets (192.168.101.21, 192.168.101.22) that use Modbus over TCP/IP.
- Nevertheless, when the Profinet PLC related by the SCALANCE X108, I
can now not ping it from the PC, I believe the Cisco Swap is dropping VLAN
0 frames. Precedence is assigned to Profinet real-time messages in accordance wit normal IEEE 802.1Q. The VLAN ID 0 with VLAN precedence 6 is used for Profinet Actual Time packets.
What I’ve Checked:
Since Profinet use VLAN 0, I configured Cisco Swap port to permit this VLAN 0 visitors, I’ve tried two workarounds , to make a non industrial Cisco Catalyst VLAN-Primarily based Swap to work with Profinet Protocol. The primary makes use of a voice VLAN that may move vlan 0. The second strategy makes use of a trunk port.
- Voice VLAN over entry port :
Swap(config)# interface GigabitEthernet 0/16 Swap(config-if)# switchport mode entry Swap(config-if)# switchport entry vlan 101 Swap(config-if)# switchport voice vlan dot1p
- Trunk Port:
Swap(config)# default interface 0/16 Swap(config)# interface GigabitEthernet 0/16 Swap(config-if)# switchport trunk allowed vlan 101 Swap(config-if)# switchport native vlan 101
With these approaches I am fairly certain that Profinet gadgets will work on non industrial Cisco switches when these gadgets are instantly hooked to the identical change. I have to make it work with Profinet gadgets related to an Industrial Siemens Swap which is related to a Cisco change.
I’ve additionally checked the Cisco change MAC tackle desk and ARP desk on Port Gi 0/16 and the machine will not be exhibiting up:
cisco# present mac address-table interface gigabitEthernet 0/16 Mac Tackle Desk ------------------------------------------- Vlan Mac Tackle Kind Ports ---- ----------- -------- ----- 101 000e.8c87.5b71 DYNAMIC Gi0/16 101 000e.cf1b.1288 DYNAMIC Gi0/16 Complete Mac Addresses for this criterion: 2 cisco#
Im nonetheless not capable of ping the PLC even permitting VLAN 0 by the voice VLAN and Trunking. I do not know the place to verify if the Cisco change is definitely dropping visitors. I’ve checked debug arp and to this point see no difficulty
Has anybody encountered the same difficulty or may present steering on what may be fallacious? Any particular configurations or checks I ought to carry out on the Cisco C2960 to make sure Profinet visitors is passing by appropriately?
Thanks prematurely to your assist!