ES-4124 User’s Guide
Chapter 31 VRRP
205
C
H A P T E R
31
VRRP
This chapter shows you how to configure and monitor the Virtual Router Redundancy
Protocol (VRRP) on the switch.
31.1 VRRP Overview
Each host on a network is configured to send packets to a statically configured default gateway
(this switch). The default gateway can become a single point of failure. Virtual Router
Redundancy Protocol (VRRP), defined in RFC 2338, allows you to create redundant backup
gateways to ensure that the default gateway of a host is always available.
In VRRP, a virtual router (VR) represents a number of physical layer-3 devices. An IP address
is associated with the virtual router. A layer-3 device having the same IP address is the
preferred master router while the other Layer-3 devices are the backup routers. The master
router forwards traffic for the virtual router. When the master router becomes unavailable, a
backup router assumes the role of the master router until the master router comes back up and
takes over.
The following figure shows a VRRP network example with the switches (
A
and
B
)
implementing one virtual router
VR1
to ensure the link between the host
X
and the uplink
gateway
G
. Host
X
is configured to use
VR1
(192.168.1.20) as the default gateway. If switch
A
has a higher priority, it is the master router. Switch
B
, having a lower priority, is the backup
router.
Содержание Dimension ES-4124
Страница 1: ...ES 4124 Intelligent Layer 3 Switch User s Guide Version 3 70 8 2006...
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Страница 7: ...ES 4124 User s Guide Safety Warnings 5 This product is recyclable Dispose of it properly...
Страница 36: ...ES 4124 User s Guide 34 Chapter 1 Getting to Know Your Switch...
Страница 40: ...ES 4124 User s Guide 38 Chapter 2 Hardware Installation and Connection...
Страница 48: ...ES 4124 User s Guide 46 Chapter 3 Hardware Overview...
Страница 58: ...ES 4124 User s Guide 56 Chapter 4 The Web Configurator...
Страница 64: ...ES 4124 User s Guide 62 Chapter 5 Initial Setup Example...
Страница 70: ...ES 4124 User s Guide 68 Chapter 6 System Status and Port Statistics...
Страница 82: ...ES 4124 User s Guide 80 Chapter 7 Basic Setting...
Страница 95: ...ES 4124 User s Guide Chapter 8 VLAN 93 Figure 39 Port Based VLAN Setup All Connected...
Страница 96: ...ES 4124 User s Guide 94 Chapter 8 VLAN Figure 40 Port Based VLAN Setup Port Isolation...
Страница 98: ...ES 4124 User s Guide 96 Chapter 8 VLAN...
Страница 107: ...ES 4124 User s Guide Chapter 11 Spanning Tree Protocol 105 Figure 45 RSTP Configuration...
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Страница 126: ...ES 4124 User s Guide 124 Chapter 15 Link Aggregation...
Страница 132: ...ES 4124 User s Guide 130 Chapter 16 Port Authentication...
Страница 136: ...ES 4124 User s Guide 134 Chapter 17 Port Security...
Страница 142: ...ES 4124 User s Guide 140 Chapter 18 Classifier Figure 61 Classifier Example...
Страница 149: ...ES 4124 User s Guide Chapter 19 Policy Rule 147 Figure 64 Policy Example...
Страница 150: ...ES 4124 User s Guide 148 Chapter 19 Policy Rule...
Страница 153: ...ES 4124 User s Guide Chapter 20 Queuing Method 151 Figure 65 Queuing Method...
Страница 160: ...ES 4124 User s Guide 158 Chapter 21 VLAN Stacking...
Страница 236: ...ES 4124 User s Guide 234 Chapter 33 Access Control...
Страница 238: ...ES 4124 User s Guide 236 Chapter 34 Diagnostic...
Страница 242: ...ES 4124 User s Guide 240 Chapter 35 Syslog...
Страница 250: ...ES 4124 User s Guide 248 Chapter 36 Cluster Management...
Страница 258: ...ES 4124 User s Guide 256 Chapter 40 Routing Table...
Страница 306: ...ES 4124 User s Guide 304 Chapter 43 User and Enable Mode Commands...
Страница 320: ...ES 4124 User s Guide 318 Chapter 44 Configuration Mode Commands...
Страница 336: ...ES 4124 User s Guide 334 Chapter 46 IEEE 802 1Q Tagged VLAN Commands...
Страница 340: ...ES 4124 User s Guide 338 Chapter 48 Routing Domain Command Examples...
Страница 350: ...ES 4124 User s Guide 348 Chapter 49 Troubleshooting...
Страница 356: ...ES 4124 User s Guide 354 Appendix A Product Specifications...