Which status for VRRP routers is NOT valid?

A.
master

B.
backup

C.
transition

D.
preempt

Explanation:
Summary:

Virtual Router Redundancy Protocol (VRRP) is supported on specific Juniper firewall devices. Below you will find design notes and limitations, the minimum configuration required for VRRP, as well as the commands for verifying your VRRP configuration.

Solution:

If you are using VRRP on an SSG series device you need to be running ScreenOS 6.1 or later. Otherwise, it is supported on all devices.

Design Notes and Limitations:
*
* VRRP is only supported on SSG series devices running 6.1 or later.
* Only Ethernet and Gigabit interfaces support VRRP. WAN and Serial interfaces do not support VRRP.
* Not supported if VRRP is enabled on a bridge group interface.
* One interface can support up to 2 VRRP groups.
* Only one group can be enabled on one interface.
* One VRRP group can only support one VRRP virtual IP except owner IP.

When a device supports VRRP, it cannot support NSRP and vice-versa; VRRP and NSRP are mutually exclusive on same device.

Authentication is not supported (the latest VRRP RFC obsoletes it). Authentication message will be accepted but authentication field is ignored.

ScreenOS will directly use:
VRRP group ID as NSRP VSD group ID
VRRP group ID ranges from 1 to 7.
VSI use the VRRP virtual IP as IP address
owner IP as manage-IP.

MIB/SNMP for VRRP may be supported later upon marketing request.

Configuration example:

set interface ethernet0/1 protocol vrrp
set interface ethernet0/1:6 ip 192.168.1.100/24 — Configure a virtual IP for the VRRP interface, group 6
set interface ethernet0/1:6 protocol vrrp preempt — Define pre-empt feature on the interface
set interface ethernet0/1:6 protocol vrrp priority 50 — Define the priority of the VRRP Group
set interface ethernet0/1 protocol vrrp enable — Enable VRRP on interface

To verify configuration:

get vrrp interface — Show VRRP information of all interfaces
get int e0/1 protocol vrrp — Show VRRP information of specific interfaces