Month: July 2025

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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Ticket 21: Wireless Clients Disconnect Randomly: FlexConnect Central Switching Misconfigured[CCNP Enterprise]

Ticket#21: Wireless Clients Disconnect Randomly: FlexConnect Central Switching Misconfigured [CCNP Enterprise]

Problem Summary A branch site reported that multiple wireless clients...

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Ticket#22: Access Switch High CPU – Excessive SNMP Polling Detected [CCNP Enterprise]

Ticket#22: Access Switch High CPU – Excessive SNMP Polling Detected [CCNP Enterprise]

Problem Summary A critical alert was triggered in the NMS...

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Ticket#23: SSL VPN Users Cannot Reach Internal Resources – Split Tunnel ACL Error Fixed [CCNP Enterprise]

Ticket#23: SSL VPN Users Cannot Reach Internal Resources – Split Tunnel ACL Error Fixed [CCNP Enterprise]

Problem Summary Users working remotely via Cisco AnyConnect VPN reported...

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Ticket#24: Routing Table Blackhole – Route Redistribution Loop Detected Between OSPF and BGP [CCNP Enterprise]

Ticket#24: Routing Table Blackhole – Route Redistribution Loop Detected Between OSPF and BGP [CCNP Enterprise]

Problem Summary An enterprise site experienced sporadic loss of connectivity...

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Ticket#25: Server Reachable via Ping but Not SSH – TCP MSS Clamp Missing on Firewall [CCNP Enterprise]

Ticket#25: Server Reachable via Ping but Not SSH – TCP MSS Clamp Missing on Firewall [CCNP Enterprise]

Problem Summary A remote branch server (e.g., 10.1.20.10) was reachable...

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Wireless LAN Controller Architecture – A CCNP Deep Dive [CCNP ENTERPRISE]_networkjourney

Wireless LAN Controller Architecture – A CCNP Deep Dive [CCNP ENTERPRISE]

If you’ve ever worked with enterprise Wi‑Fi, you know how...

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CAPWAP Overview – Bridging Access Points and Controllers [CCNP Enterprise] _networkjourney

CAPWAP Overview – Bridging Access Points and Controllers [CCNP Enterprise]

If you’ve ever wondered how your lightweight Access Points (APs)...

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