Hands-on CCNA and CCNP practice labs — OSPF, VLANs, ACLs, routing, NAT and more, each a real Cisco Modeling Labs scenario you build and grade against the answer key.
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Harden the Layer-2 access edge by enabling DHCP Snooping on a single access switch and placing the trust boundary only toward the legitimate DHCP server/gateway. Validate with show commands and end-host connectivity.
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Harden the Layer-2 access edge by enabling Dynamic ARP Inspection (DAI) on a single access switch. DHCP Snooping is already in place and the uplink toward the DHCP server/gateway is trusted. Your job: enable DAI for VLAN 10 and trust the uplink so ARP on host-facing ports is validated against the DHCP Snooping bindings.
Enable the open-standard LLDP on adjacent Cisco IOS routers over direct point-to-point links while also attaching the devices to a shared management LAN. Learners configure deterministic LLDP behavior (global enable plus per-interface transmit/receive) and verify neighbor discovery without adding any routing protocols or static routes.
Enable Cisco Discovery Protocol (CDP) on R1 to map directly-connected Cisco neighbors while suppressing CDP advertisements on the untrusted management-edge interface. Routers are directly cabled for true CDP adjacency and also share a common management LAN via SW1 alongside an Alpine MGMT host.
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Configure a Cisco IOS router (R1) to forward its logs to a central syslog server with accurate date/time and millisecond timestamps. Validate the remote host and trap level in show logging. This is Lab 4 of 10 in the Network Discovery & Monitoring series.
Tune which syslog messages go where on Cisco IOS using severity levels: keep detailed logs locally in a 16 KB buffer, reduce console noise to warnings, and send notifications to a central server. Single management LAN, no routing. Grading focuses on three R1 commands steering severity: logging buffered 16384 debugging, logging console warnings, and logging trap notifications.
Advanced discovery and monitoring capstone, run as a fault hunt. The NMS has stopped seeing this site: neighbours are missing from the topology map, no traps are arriving, and syslog went quiet — while every device is reachable and pingable. You get symptoms and the required end state — no fault list. Faults span both routers and the switch they all peer through, and more than one of them leaves the monitoring configuration looking complete.
Harden the monitoring plane by replacing cleartext SNMPv2c with authenticated and encrypted SNMPv3 (authPriv) on R1. You will create a v3 group that requires privacy and a user with SHA authentication and AES-128 encryption, then verify the configuration. The flat management LAN avoids routing complexity so you can focus on the security mechanics of SNMPv3.
Configure Cisco IOS SNMPv2c read-only access on R1 so an NMS on a trusted management LAN can poll device status. You will add a read-only community string and device identity (location/contact), validate from IOS show commands, and confirm basic reachability from the MGMT host. No routing protocols or static routes are used; all devices share a single management subnet bridged by an L2 switch.
Enable and verify DNS-based name resolution on Cisco IOS. R1 will use a central DNS resolver on the management LAN and also maintain a static host mapping for R2, demonstrating resolution order and operational differences between local host tables and DNS queries.
Configure a Cisco IOS router (R1) to proactively send SNMPv2c trap notifications to a centralized NMS host. Learners practice the difference between polling and traps, add the trap destination and enable device-initiated notifications, and verify deterministically with show commands. Flat L2-only management LAN; no routing, no VLAN/STP complexity.
Practice deterministic VLSM planning and interface addressing on two Cisco IOS routers. Starting from a single /24, allocate three right-sized IPv4 subnets (two LANs represented by loopbacks and one router-to-router WAN) and configure exact interface addresses and masks. No routing protocols or static routes are configured; verification focuses on directly connected reachability and show commands.
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