EtherNet/IP scanner dropping a 1794 rack every 47 minutes
The question
CompactLogix, 14 nodes, managed Stratix. One POINT I/O rack drops, comes back, no duplicate IP. IGMP snooping is on. Looking for a packet capture filter that actually found this for someone.
TS ControlsThe answer
Wireshark: ip.addr == the POINT and cip && (enip.command == 0x006F). We had a 47-minute DHCP lease on a printer VLAN leaking into the cell through a bad trunk. Also check the Stratix IGMP querier — if two switches both think they are querier the rack ages out on a timer that looks random until you plot it.
Replies from members
- Loading replies…
Log in to reply. Google, X or email.
Confirm your email to post. The link is in your inbox.
