In this section, we explore the world of programming, algorithms, networks, and infrastructure
This hands-on lab configures inbound and outbound prefix-list filters on a BGP session to control exactly which routes are accepted or advertised, verifying the filters block unwanted prefixes while permitting the intended ones through.
This hands-on lab configures BGP route summarization using the aggregate-address command, advertising a single summarized route for several specific subnets while comparing the summary-only and summary-plus-specifics behavior options.
This hands-on lab configures an eBGP session between two loopback addresses requiring multiple router hops, using ebgp-multihop to establish it, then adds MD5 authentication to secure the resulting session.
This hands-on lab configures Bidirectional Forwarding Detection between two routers and links it to OSPF, dramatically reducing failure detection time compared to relying on OSPF's own hello and dead timers alone.
This hands-on lab configures an IP SLA operation to actively measure round-trip time and jitter to a remote destination, scheduling it to run continuously and reviewing the collected performance statistics.
This hands-on lab configures a Cisco IOS Zone-Based Firewall between an inside and outside zone, defining a security policy permitting outbound-initiated traffic while blocking unsolicited inbound connections, and verifies stateful return traffic is handled automatically.
This hands-on lab configures 802.1X on a switch port requiring RADIUS-based authentication before granting network access, verifying an unauthenticated device is blocked while a properly authenticated device is granted access to the assigned VLAN.
This hands-on lab configures MAC Authentication Bypass as a fallback authentication method on an 802.1X-enabled port, allowing a device incapable of 802.1X (such as a printer) to still gain network access based on its MAC address after the 802.1X exchange times out.
This hands-on lab extends the basic single-hub DMVPN topology from an earlier lab to two spokes, configuring Phase 3 settings that allow direct spoke-to-spoke tunnels to form dynamically rather than forcing all inter-spoke traffic through the hub.
This hands-on lab extends the Phase 3 DMVPN topology from the previous lab with a second hub, configuring each spoke to register with both hubs simultaneously and verifying automatic failover when the primary hub becomes unreachable.
This hands-on lab configures an EEM applet that automatically detects an interface flapping and executes a corrective action, demonstrating how IOS itself can respond to specific events without external monitoring software or manual intervention.
This hands-on lab enables NETCONF on a router and uses it from a management station to retrieve interface configuration as structured XML data, demonstrating the model-driven programmability approach that complements traditional CLI-based management.
