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[>_] ROOM · Networking
Network Redundancy Protocols
Master HSRP, VRRP, and GLBP to ensure high availability and secure network redundancy against failover and MITM attacks.
Room tasks
1What Is First-Hop Redundancy and Why Does It Matter
2HSRP Configuration & Operation
3VRRP vs HSRP vs GLBP
4Guided Lab: Configuring HSRP for Gateway Redundancy
Frequently Asked Questions
What is a first-hop redundancy protocol?
FHRPs let multiple routers share a virtual gateway address so hosts keep connectivity if one router fails. HSRP, VRRP and GLBP are the common examples.
What is the difference between HSRP and VRRP?
HSRP is Cisco-proprietary, while VRRP is an open standard. GLBP, also Cisco, additionally load balances across gateways rather than using a single active router.
Can redundancy protocols be attacked?
Yes, an attacker can claim the active role with a higher priority and intercept traffic. Authentication and filtering prevent this, as covered in this free Codelivly room.