Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 431)

Brocade ICX 6650 Layer 3 Routing Configuration Guide 413
53-1002603-01
VRRP and VRRP-E overview
If Switch 1 fails, you could configure Host1 to use Switch 2. Configuring one host with a different
default gateway might not require too much extra administration. However, consider a more
realistic network with dozens or even hundreds of hosts per subnet; reconfiguring the default
gateways for all the hosts is impractical. It is much simpler to configure a VRRP virtual router on
Switch 1 and Switch 2 to provide a redundant path for the hosts.
Figure 31 shows the same example network shown in Figure 30 , but with a VRRP virtual router
configured on Switch 1 and Switch 2.
FIGURE 31 Switch 1 and Switch 2 configured as VRRP virtual routers for redundant network access for Host1
The dashed box in Figure 31 represents a VRRP virtual router. When you configure a virtual router,
one of the configuration parameters is the virtual router ID (VRID), which can be a number from 1
through 255. In this example, the VRID is 1.
NOTE
You can provide more redundancy by also configuring a second VRID with Switch 2 as the Owner and
Switch 1 as the Backup. This type of configuration is sometimes called Multigroup VRRP.
Internet
or
enterprise Intranet
Internet
or
enterprise Intranet
Host1
Default Gateway
192.168.5.1
192.168.5.1 e 1/1/6 e 1/1/5 192.168.5.3
e 1/1/3 e 1/1/2
VRID1
Switch1 = Master
IP address = 192.168.5.1
MAC address = 00-00-00-00-01-01
Priority = 255 VRID1
Switch2 = Backup
IP address = 192.168.5.1
MAC address = 00-00-00-00-01-01
Priority = 100
Owner
Switch1 Switch2