https://community.cisco.com/t5/application-networking/n3k-disable-dynamic-mac-learning-notifications/m-p/3998880#M51162 <PRE>interface Ethernet1/1 switchport mac-learn disable</PRE> Sat, 14 Dec 2019 14:54:45 GMT Aliaksandr Tratseuski 2019-12-14T14:54:45Z https://community.cisco.com/t5/application-networking/n3k-disable-dynamic-mac-learning-notifications/m-p/2948855#M43235 <P>Hi folks,</P> <P>We're using Nexus 3000 high-speed traffic filtering for analysis. There are a couple of input ports (inbound traffic - only one fiber in a single port) and a single output.</P> <P>It was noticed that the switch complains on MAC bouncing between the input ports. Here is the example:</P> <PRE class="prettyprint">%FWM-2-STM_LOOP_DETECT: Loops detected in the network for mac aaaa.bbbb.cccc among ports Eth1/5 and Eth1/3 on vlan X - Disabling dynamic learning notifications for a period between 120 and 240 seconds on vlan X.</PRE> <P>But for our application it is a normal situation - load-balanced links are monitored. Could this message just be turned off? I suppose it consumes lots of CPU resources because it appears for each monitored VLAN.</P> Tue, 03 Jan 2017 09:17:44 GMT https://community.cisco.com/t5/application-networking/n3k-disable-dynamic-mac-learning-notifications/m-p/2948855#M43235 Aliaksandr Tratseuski 2017-01-03T09:17:44Z https://community.cisco.com/t5/application-networking/n3k-disable-dynamic-mac-learning-notifications/m-p/3998880#M51162 <PRE>interface Ethernet1/1 switchport mac-learn disable</PRE> Sat, 14 Dec 2019 14:54:45 GMT https://community.cisco.com/t5/application-networking/n3k-disable-dynamic-mac-learning-notifications/m-p/3998880#M51162 Aliaksandr Tratseuski 2019-12-14T14:54:45Z