【#50 ネットワーク CCNA CCNP 講座】VRRP（HSRP）ってなんだ？

Thank you for watching. This is Masaru. I started studying to pass the Network Specialist exam in the fall of 2020. I'll do my best to provide useful information for networking students. Please also use this for CCNA and CCNP preparation. -Study Notes- [Today's Mission] About VRRP Output! VRRP A protocol for creating redundant router configurations Create a group with multiple routers to build a virtual router A virtual IP address and virtual MAC address are created and assigned to the master router Background I want to create redundant DGWs. Furthermore, we don't want users (PCs) to have to manually change the DGW settings. This configuration allows for DGW redundancy, but requires manual DGW changes in the event of network problems. Configuring VRRP allows for DGW redundancy and automatically switches over to the other line in the event of network problems. VRRP Flow Create a VRRP group and add routers to it. Create virtual IP addresses and virtual MAC addresses to be used in the VRRP group. A master router is selected. The virtual IP addresses and virtual MAC addresses are inherited. Set the virtual IP addresses on the client DGWs. The router selected as the master router always handles routing. The other router acts as a backup. During a VRRP failure VRRP advertisements do not arrive from the master router to the backup router for a certain period of time. The backup router prepares to become the master router. It takes over the virtual IP address. It takes over the virtual MAC address. It sends a GARP request to the switch, updating the switch's MAC address table. The backup router becomes the master router. Communication continues via the new master router. -Study Notes-