Table 7: Vrrpv2 To Vrrpv3 Transition Steps And Events - Juniper EX9200 Features Manual

High Availability Feature Guide for EX9200 Switches
124
VRRPv2 (for IPv4) packets are always given the highest priority.
Checksum differences between VRRPv2 and VRRPv3 (for IPv6) can create multiple
master routers.
Disable VRRPv3 (for IPv6) on the backup routers while upgrading to avoid creating
multiple master routers.
Table 7 on page 124 illustrates the steps and events that take place during a VRRPv2 to
VRRPv3 transition. In Table 7 on page
in two groups, G1 and G2. Router R1 acts as the master for G1, and Router R2 acts as the
master for G2.

Table 7: VRRPv2 to VRRPv3 Transition Steps and Events

1. Upgrade Router R1 with Junos OS Release 12.2 or later.
Router R2 becomes the master for both G1 and G2.
After the upgrade of Router R1 is completed, Router R1 becomes the master for G1.
Router R2 remains the master for G2.
2. Upgrade Router R2 with Junos OS Release 12.2 or later.
Router R1 becomes the master for both G1 and G2.
After the upgrade of Router R2 is completed, Router R2 becomes the master for G2.
Router R1 remains the master for G1.
For IPv4
3. Enable VRRPv3 on Router R1.
Router R1 becomes the backup for both
G1 and G2 because VRRPv2 IPv4
advertisement packets are given higher
priority.
4. Enable VRRPv3 on Router R2.
Router R1 becomes the master for G1.
Router R2 becomes the master for G2.
When enabling VRRPv3, make sure that VRRPv3 is enabled on all the VRRP routers in
the network because VRRPv3 (IPv4) does not interoperate with the previous versions of
VRRP. For example, if VRRPv2 IPv4 advertisement packets are received by a router on
which VRRPv3 is enabled, the router transitions itself to the backup state to avoid creating
multiple masters in the network.
You can enable VRRPv3 by configuring the version-3 statement at the
vrrp] hierarchy level (for IPv4 or IPv6 networks). Configure the same protocol version on
all VRRP routers on the LAN.
124, two VRRPv2 routers, R1 and R2, are configured
For IPv6
3. Deactivate G1 and G2 on Router R2.
G1 and G2 on Router R1 become master.
4. Enable VRRPv3 on Router R1.
Router R1 becomes the master for both G1
and G2.
5. Enable VRRPv3 on Router R2.
6. Activate G1 and G2 on Router R2.
Router R2 becomes the master for G2.
Router R1 remains the master for G1.
Copyright © 2017, Juniper Networks, Inc.
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