The following table lists terms and definitions used in this VRRP configuration discussion.
VRRP Configuration Terms and Definitions
| Term | Definition |
|---|---|
| Accept Mode | When enabled, it allows the master for this virtual router to accept IP packets for the configured associated IP address list. |
| Backup | The set of VRRP routers available to assume forwarding responsibility for a virtual router should the current Master fail. |
| IP Address owner | The VRRP router that has the virtual router's IP address(es) as real interface address(es). This is the router that, when up, will respond to packets addressed to one of these IP addresses for ICMP pings, TCP connections, etc. |
| Master | The VRRP router that is assuming the responsibility of forwarding packets sent to the IP address(es) associated with the virtual router, and answering ARP requests for these IP addresses. |
| Priority | The priority field specifies the sending VRRP router's priority for the virtual router. Higher values equal higher priority. This field is an 8 bit unsigned integer field. The priority value for the VRRP router that owns the IP address(es) associated with the virtual router MUST be 255 (decimal). VRRP routers backing up a virtual router MUST use priority values between 1-254 (decimal). The default priority value for VRRP routers backing up a virtual router is 100 (decimal). The priority value zero (0) has special meaning indicating that the current Master has stopped participating in VRRP. This is used to trigger Backup routers to quickly transition to Master without having to wait for the current Master to timeout. |
| Virtual Router | An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN. A VRRP Router may backup one or more virtual routers. |
| VRID | Virtual Router ID — a unique number associated with each virtual router. |
| VRRP fabric route mode | A VRRP feature that allows a VRRP instance in the backup state to forward IPv4 and IPv6 packets destined for the VRRP MAC address. |
| VRRP Router | A router running the Virtual Router Redundancy Protocol. It may participate in one or more virtual routers. A VRRP router may associate a virtual router with its real addresses on an interface, and may also be configured with additional virtual router mappings and priority for virtual routers it is willing to backup. |
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