IntermediatePublished 2026-08-08
CCNA Foundations: VRRP — Standards-Based First-Hop Redundancy
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Build gateway resiliency on a campus user LAN using VRRP between two edge routers. You will configure a VRRP group with a shared virtual IP, set a higher priority on the intended master, and prove failover from the end hosts without changing the default gateway. Includes full SSH management on routers, a clean L2 access switch, and two clients using the VRRP VIP.
Learning objectives
- Configure a VRRP group with a virtual IP shared by two routers on a user VLAN
- Elect the VRRP master by setting priority and observe default preemption
- Verify gateway continuity from hosts and validate VRRP state with show commands
- Contrast VRRP with HSRP behavior and virtual MAC addressing
Troubleshooting focus
- Diagnose why a host cannot reach the default gateway VIP by checking VRRP state and interface status
- Identify ARP anomalies where the host caches the virtual MAC and validate VRRP Master/Backup transitions
- Confirm the default gateway on hosts matches the VRRP VIP and not a physical router address
Topology
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How this lab is graded
- Build it your way. Where a lab lets you choose a value — a VLAN name, an interface description — grading checks that you configured it, not which name you picked. Names that another line has to reference, like an ACL applied with
access-class, are stated in the guide and do have to match. - Addresses, modes and protocol keywords are exact. An IP address, a subnet mask,
switchport mode trunk, an encapsulation — these carry the meaning of the lab, so they are graded as written in the guide. - Grading reads your saved configuration. Export the lab from CML after you have configured it, and make sure anything you set is in the running-config — a change that only exists in a terminal session never reaches the grader.
- You can submit as many times as you like. Your best score stands, and each attempt tells you which checks passed so you can work the gaps.
- Scored something you believe is correct? Use Report an issue on this page — that is exactly how the grading fixes in the changelog got found.
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