Accept mode for backup VRRP devices
Accept mode allows a backup VRRP device to respond to ping, traceroute, and Telnet packets if the backup device becomes the master VRRP device.
For each VRRP virtual routing instance, there is one master device and all other devices are backups. Accept mode allows some network management functionality for backup VRRP devices, providing the ability to respond to ping, traceroute, and Telnet packets. By default, nonowner VRRP devices do not accept packets destined for the IPv4 or IPv6 VRID addresses. Troubleshooting network connections to the VRRP nonowner master device is difficult unless accept mode is enabled.
NOTE
The accept mode functionality enables a VRRP nonowner master device to respond to ping, Telnet, and traceroute packets, but the device will not respond to SSH packets. When the device acting as the master device is not the IP address owner (the device with the interface whose actual IP address is used as the virtual device’s IP address), the master device accepts only the ARP packets sent to the virtual IP address. When accept mode is configured, the master device responds to ping, TELNET, and traceroute packets sent to the virtual IP address even when the master device is not the IP address owner.