Multi-domain VRRP example
This example consists of two VRRP domains, and both FortiGates participate in the domains that connect an internal network to the internet. One FortiGate is the primary router of one domain and the other FortiGate is the primary router of the other domain. The network distributes traffic between two different default routes (10.31.101.120 and 10.31.101.130). One VRRP domain is configured with one of the default route IP addresses and the other VRRP domain gets the other default route IP address. During normal operation, both FortiGates process traffic, and the VRRP domains are used to load balance the traffic between the two FortiGates.
If one of the FortiGates fails, the remaining FortiGate becomes the primary router of both VRRP domains. The network sends all traffic for both default routes to this FortiGate. The result is a configuration that (under normal operational load) balances traffic between two FortiGates, but if one of the FortiGates fails, all traffic fails over to the FortiGate that is still operating.
VRRP virtual MAC address are enabled on both FortiGates' port2 interfaces so that the VRRP domains use their VRRP virtual MAC addresses.
|
Device |
VRRP primary |
VRRP backup |
||||
|---|---|---|---|---|---|---|
|
Virtual router IP |
ID |
Priority |
Virtual router IP |
ID |
Priority |
|
|
FortiGate A |
10.31.101.120 |
50 |
255 |
10.31.101.130 |
100 |
50 |
|
FortiGate B |
10.31.101.130 |
100 |
255 |
10.31.101.120 |
50 |
50 |
To configure FortiGate A:
config system interface
edit port2
set vrrp-virtual-mac enable
config vrrp
edit 50
set vrip 10.31.101.120
set priority 255
next
edit 100
set vrip 10.31.101.130
set priority 50
next
end
next
end
To configure FortiGate B:
config system interface
edit port2
set vrrp-virtual-mac enable
config vrrp
edit 50
set vrip 10.31.101.120
set priority 50
next
edit 100
set vrip 10.31.101.130
set priority 255
next
end
next
end