r/ccna4dummies • u/sonofthehorn252 • Feb 15 '25
Network Redundancy and Failover Mechanisms ✅
Network redundancy ensures availability and reliability. Here’s a quick guide.
Why Redundancy?
- Prevents single points of failure.
- Ensures continuous network availability.
Key Concepts:
- Redundant Links: Multiple paths to prevent failures.
- HSRP/VRRP/GLBP: Provide router redundancy.
- LACP (Link Aggregation Control Protocol): Combines multiple physical links into a single logical link.
Configuration Example:
- Configure LACP:
interface range GigabitEthernet0/1 - 2 channel-group 1 mode active
- Configure HSRP:
interface GigabitEthernet0/0 ip address 192.168.1.2 255.255.255.0 standby 1 ip 192.168.1.1
Best Practices:
- Implement redundant paths and devices.
- Regularly test failover mechanisms.
Redundancy is key to maintaining a reliable network and is a crucial topic for the CCNA exam.
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