Author: Sagar Dhawan

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...

Read More
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...

Read More
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...

Read More
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...

Read More
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...

Read More
[DAY#6 PyATS Series] Using pyATS CLI tools: pyats learn, pyats parse using PyATS [Python for Network Engineer]

[DAY#6 PyATS Series] Using pyATS CLI tools: pyats learn, pyats parse using PyATS [Python for Network Engineer]

Introduction: Your First Step into CLI Magic with pyATS Today’s...

Read More
Creating Your First testbed.yaml (Multi-Vendor Testbed) using pyATS for Cisco

[Day#4 PyATS Series] Creating Your First testbed.yaml (Multi-Vendor Testbed) using pyATS for Cisco

Introduction on the Key Points In Day 4 of our...

Read More
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...

Read More
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...

Read More