Configuring Virtual Router Redundancy Protocol (Vrrp); Understanding Vrrp On Acx Series Routers - Juniper ACX1000 Configuration Manual

CHAPTER 21
Configuring Virtual Router Redundancy
Protocol (VRRP)

Understanding VRRP on ACX Series Routers

Copyright © 2017, Juniper Networks, Inc.
Understanding VRRP on ACX Series Routers on page 651
Configuring Basic VRRP Support on page 653
Configuring the Advertisement Interval for the VRRP Master Router on page 655
Configuring a Backup Router to Preempt the Master Router on page 656
Modifying the Preemption Hold-Time Value on page 657
Configuring Asymmetric Hold Time for VRRP Routers on page 657
Configuring an Interface to Accept Packets Destined for the Virtual IP
Address on page 658
Configuring a Logical Interface to Be Tracked on page 659
Configuring a Route to Be Tracked on page 661
Configuring the Silent Period on page 663
Tracing VRRP Operations on page 664
Example: Configuring VRRP on page 665
Configuring VRRP for IPv6 on page 667
For Ethernet, Fast Ethernet, Gigabit Ethernet, 10-Gigabit Ethernet, and logical interfaces,
you can configure Virtual Router Redundancy Protocol (VRRP). VRRP enables hosts on
a LAN to make use of redundant routers on that LAN without requiring more than the
static configuration of a single default route on the hosts. The routers running VRRP share
the IP address corresponding to the default route configured on the hosts. At any time,
one of the routers running VRRP is the master (active) and the others are backups. If the
master fails, one of the backup routers becomes the new master router, providing a virtual
default router and enabling traffic on the LAN to be routed without relying on a single
router. Using VRRP, a backup router can take over a failed default router within a few
seconds. This is done with minimum VRRP traffic and without any interaction with the
hosts.
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