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JunosE 11.3.x Service Availability Configuration Guide
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Before You Configure VRRP
156
Figure 8: VRRP Configuration Without the Real Address Owner
Assuming that preemption is enabled, the router that is configured with the highest
priority for each VRID becomes the master router. If priorities are the same, the router
that has the highest primary address becomes the master router.
This configuration shows how the address owner does not necessarily need to exist under
VRRP, and all PCs can reach destinations outside of their network through the current
master VRRP router. Depending on the accept-data configuration, the PCs may even be
able to ping their default gateway.
The election protocol specified in VRRP uses IP multicast packets to provide the router
with redundancy. Therefore, VRRP can operate over a variety of multiaccess LAN
technologies that support IP multicast. It is important to remember that there is always
one master router for an IP address shared by the redundancy group.
VRRP Overview on page 149
VRRP Implementation in E Series Routers on page 152
VRRP Router Election Rules on page 152
Before You Configure VRRP on page 156
Configuring VRRP on page 157
Before you configure VRRP, you must configure an IP interface and assign a primary IP
address and subnet mask. When the IP address belongs to the owner of the VRID, you
must associate the IP address with the VRID that you create.
To configure the IP interface for VRRP:
Configure an IP interface.
1.
Copyright © 2010, Juniper Networks, Inc.
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