Edward Mooney

How to Configure DMVPN in a Cisco Network: Complete Cisco IOS GuideDynamic Multipoint VPN (DMVPN) is a Cisco technology that combines multipoint GRE, NHRP, and IPsec to build scalable hub-and-spoke VP...

How to Configure EIGRP on a Cisco Router: Step-by-Step Cisco IOS Guide If you need fast convergence, simple neighbor relationships, and e...

Configuring VLANs and Trunk Links on Cisco Switches VLANs allow administrators to segment networks logically while using the same physical infrastructure. Create VLANs Switch(conf...

Configuring a DHCP Relay Agent on Cisco IOS Routers In many enterprise networks, DHCP servers are centralized in a data center while client devices exist across many different subnets...

Protecting Your Network with Cisco DHCP Snooping DHCP Snooping is a Layer 2 security feature available on Cisco switches that prevents unauthorized DHCP servers from distributing IP a...

How to Troubleshoot Cisco EtherChannel Problems EtherChannel allows multiple physical interfaces to operate as a single logical link. It improves bandwidth and redundancy, but it only works...

Diagnosing Cisco Trunk Port Mismatches Using IOS Trunk links connect switches and carry traffic for multiple VLANs using IEEE 802.1Q tagging. When trunk ports are misconfigured, VLAN traffi...

How to Troubleshoot a Cisco STP Blocking Port Spanning Tree Protocol (STP) prevents Layer 2 loops by placing redundant ports into a blocking state. This is normal behavior in a switched net...