Ticket#10 – NAT Overload Failure: Why Users Couldn’t Access the Internet – A Real Fix [CCNP ENTERPRISE]
Problem Summary In a mid-sized enterprise, users across VLANs suddenly...
Ticket#9 – WAN Flap Detection: DMVPN Phase 2 Tunnel Up/Down Issue Fixed [CCNP Enterprise]
Problem Summary The enterprise monitoring tool detected flapping tunnels between...
Ticket#8 – VOIP Choppy Audio – DSCP Marking Mismatch Fixed [QoS Real World] [CCNP ENTERPRISE]
Problem Summary Users across multiple floors reported choppy VoIP audio...
Ticket#7 – Multicast Video Freezes in Conference Room – Troubleshoot IGMP and PIM [CCNP ENTERPRISE]
Problem Summary In a conference room, video multicast stream intermittently...
Ticket#6 – DHCP Not Working on Access Layer – Troubleshoot Snooping and Relay [CCNP ENTERPRISE]
Problem Summary In a mid-sized enterprise campus network, multiple users...
Ticket#5 – OSPF Neighbor Stuck in INIT/2WAY – How to Diagnose and Resolve [CCNP ENTERPRISE]
Problem Summary An enterprise network reported intermittent OSPF adjacency issues...
Ticket#3 – VLAN Mismatch: End Users Unable to Reach Gateway – A Real Cisco Fix [CCNP ENTERPRISE]
Problem Summary Multiple end-users on the 3rd floor raised a...
Ticket#1-Enterprise Slowness: High CPU on Core Switch – Step-by-Step Troubleshooting [CCNP ENTERPRISE]
Problem Summary A major enterprise customer reported intermittent slowness across...