RuggedCom RuggedRouter RX1100 - Manual (Page 193)

19. Configuring VRRP
Revision 1.14.3 193 RX1000/RX1100™
The VRRP groups under the Group Name column define virtual IP groups. Clicking on a link will allow
you to add members to that group.
19.2.3. Editing A VRRP Instance
Figure 19.5. VRRP Instance
The Name field is purely for informational purposes.
The Interface field configures the interface that VRRP packets are sent upon.
The Virtual Router ID field determines the VRID number. Ensure that all routers supplying the same
VRIP have the same VRID. The value of the VRID varies from 1 to 255.
The Advert Interval field configures the time between VRRP advertisements. Ensure that all routers
supplying the same VRID have the same interval.
Note
The VRRP advertisement interval must be configured to the same value in the master and backup
routers.
The Gratuitous ARP Delay field controls the number of seconds after the router changes between
master and backup state that a second set of gratuitous ARPs are sent. This mechanism offers a
second chance to teach the switching fabric and hosts of the new provider of a gateway address.
The Extra Interface to Monitor field causes VRRP to release control of the VRIP if the specified
interface stops running. This prevents the situation in which a host forwards information to a gateway
router that itself has no way to forward the traffic.
Note
The Extra Interface to Monitor field allows monitoring of both logical and physical network
interfaces. Examples of a physical interface include:
• a WAN port, "w1"
• a channelized interface on a WAN port, "w1c1"
Logical interfaces ultimately provide transport for IP on top of physical interfaces. Examples of
logical interfaces implemented on top of physical interfaces might include:
• a PPP interface on a channelized WAN port, "w1c1ppp"
• a Frame Relay interface on an unchannelized WAN port, "w1fr16"