Month: July 2024

GLBP Operation – Cisco Describing the Cisco Nexus Family and Cisco NX-OS Software

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GLBP Operation GLBP prioritizes gateways to elect an active virtual gateway (AVG). Other group members provide backup for the AVG if that AVG becomes unavailable. If multiple gateways have the same priority, the gateway with the highest real IP address becomes the AVG. The group members request a virtual MAC address after they discover the … Read more

VRRP Router Priority and Preemption – Cisco Describing the Cisco Nexus Family and Cisco NX-OS Software

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VRRP Router Priority and Preemption VRRP router priority determines the role each VRRP router plays (that is, primary or backup) and the order of ascendancy for backup routers to become a primary if the primary fails. The priority of the primary router is 255, and the priorities of the backups are lower. In Figure 3-8, … Read more

Virtual Router Redundancy Protocol – Cisco Describing the Cisco Nexus Family and Cisco NX-OS Software

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Virtual Router Redundancy Protocol Virtual Router Redundancy Protocol (VRRP) allows for a transparent failover at the first-hop IP router by configuring a group of routers (a VRRP group) to share a single virtual IP address. VRRP selects an allowed router in that group to handle all packets for the virtual IP address. The remaining routers … Read more

HSRP Configuration – Cisco Describing the Cisco Nexus Family and Cisco NX-OS Software

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HSRP Configuration Configuring basic HSRP is a multistep process. The following are the steps to configure a basic HSRP configuration on the Cisco Nexus 7000 or 9000 Series switch: Step 1. Enable the HSRP feature. Step 2. Configure the HSRP version. Step 3. Configure the HSRP group. Step 4. Configure the virtual IP of the … Read more

HSRP Object Tracking – Cisco Describing the Cisco Nexus Family and Cisco NX-OS Software

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HSRP Object Tracking HSRP object tracking allows you to modify the priority of an HSRP interface based on the operational state of another interface. The tracking process periodically polls the tracked objects and notes any value change. The value change triggers HSRP to recalculate the priority. The HSRP interface with the higher priority becomes the … Read more