D-Link DBG-2000 Product Manual 1 - Page 80

Virtual router A.

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DBG-2000 User Guide In VRRP, instead of having only one router, a group of virtual routers is provided; If one fails, the other will take over the failed router and its IP addresses and provides uninterrupted service to the hosts. In the above configuration, the end-hosts install a default route to the IP address of the virtual router A, and all the three routers run VRRP. Router A becomes the Master Virtual router, and the other two routers become the backup routers. If the master virtual router A fails, it passes the packets to the backup virtual router, selected based on the priority given to the backup routers. The backup router (let's say 'Virtual router B') becomes the master immediately and maintains the connectivity between the hosts. Once the failed master virtual router becomes functional, the backup router (Virtual router B) forwards the packets through the recovered Virtual router A. DBG-2000 supports the VRRP feature, and it has been described in detail using the following two test cases and their topologies: 1. Test case 1 The routers (DBG1 and DBG2) have been configured with the VRRP feature for the LAN interface and are given priority numbers. For example, let's say the priority of DBG1 is 200 and DBG2 is 100. Then, when the client tries to connect to the Internet, it follows the DBG with a higher priority number. Here, it follows DBG1. But, if DBG1 gets disconnected or not reachable, it connects with the second router DBG2, and when DBG1 regains its functionality, it switches to DBG1. 2. Test case 2 80

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1.
In VRRP, instead of having only one router, a group of virtual routers is provided; If one fails, the other will take over the failed router and its IP
addresses and provides uninterrupted service to the hosts. In the above configuration, the end-hosts install a default route to the IP address of
the virtual router A, and all the three routers run VRRP. Router A becomes the Master Virtual router, and the other two routers become the
backup routers. If the master virtual router A fails, it passes the packets to the backup virtual router, selected based on the priority given to the
backup routers. The backup router (let's say 'Virtual router B') becomes the master immediately and maintains the connectivity between the
hosts. Once the failed master virtual router becomes functional, the backup router (Virtual router B) forwards the packets through the recovered
Virtual router A.
DBG-2000 supports the VRRP feature, and it has been described in detail using the following two test cases and their topologies:
Test case 1
The routers (DBG1 and DBG2) have been configured with the VRRP feature for the LAN interface and are given priority numbers. For example,
let’s say the priority of DBG1 is 200 and DBG2 is 100. Then, when the client tries to connect to the Internet, it follows the DBG with a higher
priority number. Here, it follows DBG1. But, if DBG1 gets disconnected or not reachable, it connects with the second router DBG2, and when
DBG1 regains its functionality, it switches to DBG1.
2. Test case 2
DBG-2000 User Guide
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