Day: July 16, 2025

Ticket#14 - OSPF Routes Missing: Area Type Mismatch (Stub vs NSSA) Fixed [CCNP Enterprise]

Ticket#14 – OSPF Routes Missing: Area Type Mismatch (Stub vs NSSA) Fixed [CCNP Enterprise]

Problem Summary An enterprise network running OSPF faced missing routes...

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Ticket#13: VLAN Not Propagating Across Switches – VTP Revision Number Conflict Fixed [CCNP Enterprise]

Ticket#13: VLAN Not Propagating Across Switches – VTP Revision Number Conflict Fixed [CCNP Enterprise]

Problem Summary In an enterprise campus network, a new switch...

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Ticket#12: High Packet Loss on WAN Link – Diagnosing QoS Misconfigurations [CCNP Enterprise]

Ticket#12: High Packet Loss on WAN Link – Diagnosing QoS Misconfigurations [CCNP Enterprise]

Problem Summary A branch office reported high packet loss and...

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Ticket#11: BGP Neighbor Flap – Hold Timer Expiry Due to MTU Mismatch [CCNP Enterprise]

Ticket#11: BGP Neighbor Flap – Hold Timer Expiry Due to MTU Mismatch [CCNP Enterprise]

Problem Summary An enterprise experienced intermittent BGP neighbor flaps between...

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Ticket#15 - Multicast Video Freezes Randomly: PIM DR Election Misconfiguration Found [CCNP Enterprise]

Ticket#15 – Multicast Video Freezes Randomly: PIM DR Election Misconfiguration Found [CCNP Enterprise]

Problem Summary In a large campus network using multicast video...

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Ticket#16 – SD-WAN VPN 0 Down: Color Mismatch Between Transport Interfaces [CCNP ENTERPRISE]

Ticket#16 – SD-WAN VPN 0 Down: Color Mismatch Between Transport Interfaces [CCNP ENTERPRISE]

Problem Summary A new remote branch router was provisioned and...

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Ticket#17 – VoIP Choppy Audio During Peak Hours: DSCP Marking Not Trusted on Switch Ports [CCNP ENTERPRISE]

Ticket#17 – VoIP Choppy Audio During Peak Hours: DSCP Marking Not Trusted on Switch Ports [CCNP ENTERPRISE]

Problem Summary A growing organization reported that VoIP call quality...

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Ticket#18 – Spanning Tree Topology Change Flood: Root Guard Protects Core Switch [CCNP Enterprise]

Ticket#18 – Spanning Tree Topology Change Flood: Root Guard Protects Core Switch [CCNP Enterprise]

Problem Summary A large enterprise network started experiencing random connectivity...

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Ticket#19 – DHCP Clients Getting APIPA Address: Troubleshooting DHCP Snooping and Relay Agent Issues [CCNP ENTERPRISE]

Ticket#19 – DHCP Clients Getting APIPA Address: Troubleshooting DHCP Snooping and Relay Agent Issues [CCNP ENTERPRISE]

Problem Summary A new VLAN was added for a temporary...

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Ticket#20 – Default Route Not Propagating in BGP: Missing Network Statement Fixed [CCNP Enterprise]

Ticket#20 – Default Route Not Propagating in BGP: Missing Network Statement Fixed [CCNP Enterprise]

Problem Summary In a multi-site enterprise setup running eBGP, the...

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