[Day #94 PyATS Series] Validate IPv6 Neighbor Discovery Tables Using pyATS for Cisco [Python for Network Engineer]

[Day #94 PyATS Series] Validate IPv6 Neighbor Discovery Tables Using pyATS for Cisco [Python for Network Engineer]

Introduction on the Key Points In modern network environments, IPv6 is becoming increasingly vital as IPv4 address exhaustion becomes a reality. Ensuring proper IPv6 neighbor discovery (ND) behavior is crucial for maintaining seamless network operations. Today, we will dive deep into automating the validation of […]

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 reported that they couldn’t browse the internet or access external services. While internal services like file sharing and internal DNS were operational, anything beyond the firewall was unreachable. Symptoms Observed Root Cause Analysis Initial checks […]

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 during internal calls. The problem was intermittent but noticeable during peak hours. Symptoms Observed Root Cause Analysis Upon initial inspection, end-to-end ping and traceroute were normal. However, show policy-map interface revealed DSCP marking inconsistencies between […]