Segment Routing (SR-MPLS): Replacing LDP and RSVP-TE
SR-MPLS keeps the MPLS data plane and drops LDP and RSVP-TE. Prefix-SIDs, adjacency-SIDs, source-routed label stacks, SR-MPLS vs SRv6, and why networks migrate.
Jaime
Latest posts — page 29
VTP (VLAN Trunking Protocol): v1, v2, v3 and Why It's Dangerous
How VTP propagates VLANs across a domain, the three modes, the revision-number disaster, v1/v2/v3 differences, and why many engineers disable it.
OSPF Passive Interface: What It Does and Where to Use It
OSPF passive-interface stops Hellos and adjacencies on an interface but still advertises its subnet. Config, the default pattern, and the route-filter gotcha.
Catalyst 9800-CL Day 0 Configuration, Line by Line (9800 Series Part 2)
Part 2 of the 9800 Wireless Labs: bring up the wired underlay, then walk the 9800-CL through Day 0 line by line: wireless management interface, country code, admin access, and the self-signed certificate every AP join depends on. Captured live.
Build a Catalyst 9800-CL Wireless Lab in Cisco Modeling Labs (9800 Series Part 1)
Part 1 of the PingLabz 9800 Wireless Labs: build a Catalyst 9800-CL topology in Cisco Modeling Labs from an empty canvas, with a small wired campus underneath and a bridge to a physical network.
members
EIGRP Neighbor Requirements: The 5 Things That Must Match
The 5 things that must match for EIGRP routers to become neighbors: subnet, AS number, K-values, authentication, and process membership. Plus what does NOT need to match.
Per-VLAN Spanning Tree (PVST+ and Rapid-PVST+) Explained
Per-VLAN Spanning Tree explained: PVST+ vs Rapid-PVST+, the sys-id-ext Bridge ID trick, per-VLAN root placement for uplink load balancing, and when to move to MSTP.
Lab auto-07 - Capstone: Automated Config Backup and Drift Detection
Build an automated config backup and drift detector with Netmiko: snapshot every device to a golden baseline, re-check the fleet on demand, and print a unified diff with a nonzero exit code your scheduler can alarm on. Captured on CML Free.
Lab auto-06 - Ansible for CCNA: Your First Playbook
Install Ansible on the HOST1 automation node, aim it at four Cisco IOS XE devices, and back up every config with an eleven-line playbook. You also hit a real paramiko host-key failure and fix it the way working engineers do.
Lab auto-05 - REST APIs Hands-On: Drive Your CML Controller
Learn REST APIs by driving your own CML controller: get a 401, trade credentials for a bearer token, and pull live JSON, covering the HTTP verbs, authentication, encoding, and response codes CCNA topic 6.5 expects.
Lab auto-04 - JSON and Structured Data for Network Engineers
CCNA exam topic 6.7 says interpret JSON encoded data. In this lab you read JSON, write JSON, and use it as the data backbone of a working automation tool against live Cisco IOS XE devices, separating data from code.