loop protection

[dcox]

MWhat exactly is loop protection in the GUI?
Is it what I assume, protection from an Ethernet loop?

If so, is it possible to get false alarms?
I have a WS-MINI that has one port inbound (6) and 5 customer facing ports - some to PtP links, one to PtMP link, one to PC link
I get these random loop protection warnings in the log...


Jan 2 16:45:03 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 2 16:48:04 Loop protection: re-enabling port 6
Jan 3 17:02:33 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 3 17:05:35 Loop protection: re-enabling port 6
Jan 3 17:08:58 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 3 17:12:00 Loop protection: re-enabling port 6
Jan 3 17:18:15 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 3 17:21:17 Loop protection: re-enabling port 6
Jan 3 17:21:25 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 3 17:24:27 Loop protection: re-enabling port 6
Jan 3 17:25:04 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 3 17:28:05 Loop protection: re-enabling port 6
Jan 3 17:28:27 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 3 17:31:28 Loop protection: re-enabling port 6
Jan 3 17:31:35 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 3 17:34:36 Loop protection: re-enabling port 6
Jan 3 21:12:53 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 3 21:15:54 Loop protection: re-enabling port 6
Jan 4 06:39:46 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 06:42:47 Loop protection: re-enabling port 6
Jan 4 07:38:31 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 07:41:32 Loop protection: re-enabling port 6
Jan 4 07:42:50 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 07:45:51 Loop protection: re-enabling port 6
Jan 4 08:07:52 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 08:10:53 Loop protection: re-enabling port 6
Jan 4 08:20:21 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 08:23:22 Loop protection: re-enabling port 6
Jan 4 08:23:37 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 08:26:38 Loop protection: re-enabling port 6
Jan 4 09:41:01 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 09:44:03 Loop protection: re-enabling port 6
Jan 4 10:02:56 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 10:05:58 Loop protection: re-enabling port 6
Jan 4 10:06:05 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 10:09:07 Loop protection: re-enabling port 6
Jan 4 10:09:13 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 10:12:15 Loop protection: re-enabling port 6
Jan 4 10:12:26 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 10:15:28 Loop protection: re-enabling port 6
Jan 4 10:25:25 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 10:28:27 Loop protection: re-enabling port 6
Jan 4 10:49:15 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 10:52:17 Loop protection: re-enabling port 6
Jan 4 11:21:59 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 11:25:01 Loop protection: re-enabling port 6
Jan 4 11:50:24 Loop protection: detected loop from port 6 to port 6, disabling port 6 for 180 seconds
Jan 4 11:53:26 Loop protection: re-enabling port 6
Jan 4 11:58:55 UI: Configuration changed by admin (x.x.x.x)
Jan 4 11:58:55 UI: Storm_Control_Loop_Protection: changed from 'Enabled' to 'Disabled'



Any suggestions?

[mike99]

Yes, loop protection is a ethernet loop protection to protect the switch where STP can't.

Hard to say why without a pcap file, what can be done via a port mirroring to a PC with tcpdump or wireshark.

Layer 2 or 3 device connected to port 6 ? If layer 2, last firmware on layer 2 devices connected to ports 6 ?

If you go to the tab "Device", sub-menu "Configuration", section "Storm Control", you can higher the value for "Loop Protection" to disable the port (Broadcast, Muticast, Unicat), so Loop Protection would be less sensitive.