Month: July 2025

Still Using Standard vSwitches? Here's Why DVS Is a Must in 2025 [CCNP ENTERPRISE]

Still Using Standard vSwitches? Here’s Why DVS Is a Must in 2025 [CCNP ENTERPRISE]

Today we’re diving into something that every modern network engineer...

Read More
How Do Bridge Domains and EPGs Work Together in Cisco ACI?[CCNP Enterprise]

How Do Bridge Domains and EPGs Work Together in Cisco ACI? [CCNP Enterprise]

Today we’re going deep into a topic that often seems...

Read More
2025 Guide: Overlay vs Underlay in SD-WAN – What’s Changed?[CCNP Enterprise]

2025 Guide: Overlay vs Underlay in SD-WAN – What’s Changed? [CCNP Enterprise]

If you’re anything like my students or clients, you’ve probably...

Read More
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...

Read More
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...

Read More
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...

Read More
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...

Read More
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...

Read More
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...

Read More
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...

Read More