Category: CCNP Enterprise

Ticket#10 - NAT Overload Failure: Why Users Couldn't Access the Internet – A Real Fix [CCNP ENTERPRISE]

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...

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Ticket#9 - WAN Flap Detection: DMVPN Phase 2 Tunnel Up/Down Issue Fixed [CCNP Enterprise]

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...

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Ticket#8 - VOIP Choppy Audio – DSCP Marking Mismatch Fixed [QoS Real World] [CCNP ENTERPRISE]

Ticket#8 – VOIP Choppy Audio – DSCP Marking Mismatch Fixed [QoS Real World] [CCNP ENTERPRISE]

Problem Summary Users across multiple floors reported choppy VoIP audio...

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Ticket#7 - Multicast Video Freezes in Conference Room – Troubleshoot IGMP and PIM [CCNP ENTERPRISE]

Ticket#7 – Multicast Video Freezes in Conference Room – Troubleshoot IGMP and PIM [CCNP ENTERPRISE]

Problem Summary In a conference room, video multicast stream intermittently...

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Ticket#6 - DHCP Not Working on Access Layer – Troubleshoot Snooping and Relay [CCNP ENTERPRISE]

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...

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Ticket#5 - OSPF Neighbor Stuck in INIT/2WAY – How to Diagnose and Resolve [CCNP ENTERPRISE]

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...

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Ticket#4 - BGP Route Not Installing in RIB – Path Attributes and Fix [CCNP Enterprise]

Ticket#4 – BGP Route Not Installing in RIB – Path Attributes and Fix [CCNP Enterprise]

Problem Summary A network engineer noticed that a BGP route...

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Ticket#3 - VLAN Mismatch: End Users Unable to Reach Gateway – A Real Cisco Fix [CCNP ENTERPRISE]

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...

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Ticket#2 - Server Not Reachable – Tracing Next-Hop Failure and Fix [CCNP ENTERPRISE

Ticket#2 – Server Not Reachable – Tracing Next-Hop Failure and Fix [CCNP ENTERPRISE]

Problem Summary A ticket was raised from the IT Helpdesk...

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Ticket#1-Enterprise Slowness: High CPU on Core Switch – Step-by-Step Troubleshooting [CCNP ENTERPRISE]

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...

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