Understanding Vrrp On Ex Series Switches; Overview Of Vrrp On Ex Series Switches - Juniper JUNOS OS 10.3 - SOFTWARE Manual

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Understanding VRRP on EX Series Switches

Overview of VRRP on EX Series Switches

Copyright © 2010, Juniper Networks, Inc.
model provides a faster response time for protocols that use PPM than the response
time provided by the nondistributed model.
If distributed PPM is disabled, the PPM process runs on the Routing Engine only.
Distributed PPM can be disabled for all protocols that use PPM or for a single protocol
that uses PPM. There is no way to disable PPM entirely.
BEST PRACTICE: We recommend that, generally, you disable distributed
PPM only if Juniper Networks Customer Service advises you to do so. You
should disable distributed PPM only if you have a compelling reason to disable
it.
Configuring Distributed Periodic Packet Management on an EX Series Switch (CLI
Procedure) on page 1697
Juniper Networks EX Series Ethernet Switches support the Virtual Router Redundancy
Protocol (VRRP) and VRRP for IPv6. This topic covers:
Overview of VRRP on EX Series Switches on page 1671
Examples of VRRP Topologies on page 1672
You can configure the Virtual Router Redundancy Protocol (VRRP) or VRRP for IPv6 on
Gigabit Ethernet interfaces, 10-Gigabit Ethernet interfaces, and logical interfaces on EX
Series switches. When VRRP is configured, the switches act as virtual routing platforms.
VRRP enables hosts on a LAN to make use of redundant routing platforms on that LAN
without requiring more than the static configuration of a single default route on the hosts.
The VRRP routing platforms share the IP address corresponding to the default route
configured on the hosts. At any time, one of the VRRP routing platforms is the master
(active) and the others are backups. If the master routing platform fails, one of the backup
routing platforms becomes the new master, providing a virtual default routing platform
and enabling traffic on the LAN to be routed without relying on a single routing platform.
Using VRRP, a backup EX Series switch can take over a failed default switch within a few
seconds. This is done with minimum loss of VRRP traffic and without any interaction
with the hosts.
VRRP for IPv6 provides a much faster switchover to an alternate default routing platform
than IPv6 Neighbor Discovery (ND) procedures. VRRP for IPv6 does not support the
authentication-type or authentication-key
Chapter 70: Layer 3 Protocols—Overview
statements.
1671