RUGGEDCOM ROX II
User Guide
Chapter 5
Setup and Configuration
VRRP Terminology
581
On RX1500 devices with ROX II v2.3 or higher installed, if the router with the highest priority is in a fault state,
the backup VRRP Router can delay its transition to becoming the Master router. The length of the delay is user-
defined.
VRRP can also monitor a specified interface and give up control of a gateway IP to another VRRP Router if that
interface goes down.
An Example of VRRP
In the following example, host 1 uses a gateway of 1.1.1.253 and host 2 uses a gateway of 1.1.1.252. The
1.1.1.253 gateway is provided by VRID 10. In normal practice, router 1 will provide this virtual IP since its priority
for VRID 10 is higher than that of router 2. If router 1 becomes inoperative or if its w1ppp link fails, it will relinquish
control of gateway IP 1.1.1.253 to router 2.
In a similar fashion host 2 can use the VRID 11 gateway address of 1.1.1.252, which will normally be supplied by
router 2.
1.1.1.200
1.1.1.201
w1ppp
w2ppp
2
3
4
5
6
4
1
Figure 674: VRRP Example
1.
Network
2.
Remote Router 1
3.
Remote Router 2
4.
Switch
5.
Host 1
6.
Host 2
In this example, the remote routers are configured as follows:
Remote Router 1
Remote Router 2
• VRID 10 Gateway IP: 1.1.1.253
• VRID 10 Priority: 100
• VRID 10 Monitor Interface: w1ppp
• VRID 11 Gateway IP: 1.1.1.252
• VRID 11 Priority: 50
• VRID 10 Gateway IP: 1.1.1.253
• VRID 10 Priority: 50
• VRID 11 Gateway IP: 1.1.1.252
• VRID 11 Priority: 100
• VRID 11 Monitor Interface: w2ppp
Traffic from host 1 is sent through router 1, and traffic from host 2 is sent through router 2. A failure of either
router or their WAN link will be recovered by the other router.
Note that both routers can always be reached by the hosts at their
real
IP addresses.
Содержание RUGGEDCOM RX1510
Страница 32: ...RUGGEDCOM ROX II User Guide Preface Customer Support xxxii ...
Страница 44: ...RUGGEDCOM ROX II User Guide Chapter 1 Introduction User Permissions 12 ...
Страница 62: ...RUGGEDCOM ROX II User Guide Chapter 2 Using ROX II Using the Command Line Interface 30 ...
Страница 268: ...RUGGEDCOM ROX II User Guide Chapter 4 System Administration Deleting a Scheduled Job 236 ...
Страница 852: ...RUGGEDCOM ROX II User Guide Chapter 5 Setup and Configuration Enabling Disabling an LDP Interface 820 ...