TP-Link T3700G-28TQ T3700G-28TQ V1 UG - Page 213

Basic Config, VRRP Configuration, Routing, Basic Config

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A router owns different priority in different backup groups when it participates in multiple VRRP backup groups simultaneously. In Figure 10-57, there exist three backup groups:  Backup Group 1, corresponding to Virtual Router 1. Device A is the master router; Device B and C are backup routers.  Backup Group 2, corresponding to Virtual Router 2. Device B is the master router; Device A and C are backup routers.  Backup Group 3, corresponding to Virtual Router 3. Device C is the master router; Device A and B are backup routers. To realize the workload balancing among Device A, B and C, the default gateway of the hosts associated with the LAN should be set as Virtual Router 1, 2 and 3 respectively. When it comes to priority configuration, it would be better that the VRRP priority values of the three virtual routers are different in order to prevent one router from being more than one master simultaneously.  VRRP Configuration Before configuring VRRP, users should plan well to specify the role and function of the devices in backup groups. Every switch in backup group should be configured, which is the precondition to construct a backup group. 10.10.1 Basic Config VRRP (Virtual Routing Redundancy Protocol) is a function on the Switch that dynamically assigns responsibility for a virtual router to one of the VRRP routers on a LAN. The VRRP router that controls the IP address associated with a virtual router is called the Master, and will forward packets sent to this IP address. This will allow any Virtual Router IP address on the LAN to be used as the default first hop router by end hosts. Choose the menu Routing→VRRP→Basic Config to load the following page. Figure10-58 VRRP Basic Config The following entries are displayed on this screen:  VRRP Basic Config VRID: Interface: Enter the VRID only if you are creating a new VRRP. The VRID ranges from 1 to 255. Select the Interface ID for the new VRRP. 202

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A router owns different priority in different backup groups when it participates in multiple VRRP
backup groups simultaneously.
In Figure 10-57, there exist three backup groups:
Backup Group 1, corresponding to Virtual Router 1. Device A is the master router; Device
B and C are backup routers.
Backup Group 2, corresponding to Virtual Router 2. Device B is the master router; Device
A and C are backup routers.
Backup Group 3, corresponding to Virtual Router 3. Device C is the master router; Device
A and B are backup routers.
To realize the workload balancing among Device A, B and C, the default gateway of the hosts
associated with the LAN should be set as Virtual Router 1, 2 and 3 respectively. When it
comes to priority configuration, it would be better that the VRRP priority values of the three
virtual routers are different in order to prevent one router from being more than one master
simultaneously.
VRRP Configuration
Before configuring VRRP, users should plan well to specify the role and function of the devices in
backup groups. Every switch in backup group should be configured, which is the precondition to
construct a backup group.
10.10.1 Basic Config
VRRP (Virtual Routing Redundancy Protocol) is a function on the Switch that dynamically assigns
responsibility for a virtual router to one of the VRRP routers on a LAN. The VRRP router that
controls the IP address associated with a virtual router is called the Master, and will forward
packets sent to this IP address. This will allow any Virtual Router IP address on the LAN to be
used as the default first hop router by end hosts.
Choose the menu
Routing
VRRP
Basic Config
to load the following page.
Figure10-58
VRRP Basic Config
The following entries are displayed on this screen:
VRRP Basic Config
VRID:
Enter the VRID only if you are creating a new VRRP. The
VRID ranges from 1 to 255.
Interface:
Select the Interface ID for the new VRRP.
202