Err_disable Psecure-violation Error Detected
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Security-violation Error Detected
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Frame-Relay IP Routing RIP EIGRP OSPF BGP Multicast IPv6 Quality of Service Network Management Network Services Security MPLS Security Cisco ASA Firewall New Lessons Lesson Ideas Forum Lessons Discussion Cisco Networking Cisco Certifications General https://networklessons.com/switching/how-to-configure-port-security-on-cisco-switch/ Discussion Support Log In Table of ContentsSwitchingUnit 1: Switching Basics How does a switch learn MAC Addresses Static MAC Address Table Entry CEF (Cisco Express Forwarding) Cisco SDM (Switching Database Manager) Troubleshooting Interfaces Unit 2: VLANs and Trunking Introduction to VLANs (Virtual LAN) How to configure VLANs 802.1Q Encapsulation How to configure a trunk between switches How to change the Native VLAN Cisco error detected DTP (Dynamic Trunking Protocol) Negotiation 802.1Q Tunneling (Q-in-Q) Etherchannel over 802.1Q Tunneling Private VLANs (PVLAN) InterVLAN Routing Troubleshooting VLANs & Trunks Troubleshooting Inter-VLAN Routing Unit 3: VTP (VLAN Trunking Protocol) VTP (VLAN Trunking Protocol) VTP Version 3 Unit 4: Spanning-Tree Introduction to Spanning-Tree Spanning-Tree Cost Calculation PVST (Per VLAN Spanning Tree) Spanning-Tree Port States Spanning-Tree TCN (Topology Change Notification) Spanning-Tree Portfast Spanning-Tree UplinkFast Spanning-Tree port security violation Backbone Fast Rapid Spanning-Tree Rapid Spanning-Tree Configuration MST (Multiple Spanning-Tree) Spanning-Tree BPDUFilter Spanning-Tree BPDUGuard Spanning-Tree RootGuard Spanning-Tree LoopGuard and UDLD Troubleshooting Spanning-Tree FlexLinks Unit 5: Etherchannel Introduction to Etherchannel Layer 3 Etherchannel Troubleshooting Etherchannel Unit 6: Virtualization Cisco Switch Virtualization Cisco Stackwise Unit 7: Design Unicast Flooding due to Asymmetric Routing Unit 8: Security How to configure port-security on Cisco Switch Protected Port DHCP Snooping ARP Poisoning DAI (Dynamic ARP Inspection) Unit 9: Miscellaneous Cisco IOS SPAN and RSPAN Cisco Small Business Switch VLAN Configuration RMON Statistics Collection on Cisco Catalyst Switch You are here: Home » Switching How to configure port-security on Cisco Switch Posted on February 15, 2013 by Rene Molenaar in CCIE Routing & Switching, CCIE Routing & Switching Written, CCNA Routing & Switching, CCNP SWITCH, Switching 24 votes By default there is no limit to the number of MAC addresses a switch can learn on an interface and all MAC addresses are allowed. If we want we can change this behavior with port-security. Let’s take a look at the following situation: In the topology above someone connected a cheap (unmanaged) switch that they brought from ho