Note Regarding Disabling Vrrp Or Vrrp-E; Basic Vrrp Parameter Configuration; Configuration Rules For Vrrp - Brocade Communications Systems FastIron SX 800 Configuration Manual

Basic VRRP parameter configuration

TABLE 103 VRRP and VRRP-E parameters (continued)
Parameter

Note regarding disabling VRRP or VRRP-E

NOTE
Disabling VRRP or VRRP-E is supported by IPv4 VRRP v2, and IPv6 VRRP and IPv6 VRRP-E v3.
If you disable VRRP or VRRP-E, the Layer 3 switch removes all the configuration information for the disabled protocol from the running-
config file. Moreover, when you save the configuration to the startup-config file after disabling one of these protocols, all the configuration
information for the disabled protocol is removed from the startup-config file.
The CLI displays a warning message such as the following.
Brocade Router1(config-vrrp-router)#no router vrrp
router vrrp mode now disabled. All vrrp config data will be lost when writing to flash!
If you have disabled the protocol but have not yet saved the configuration to the startup-config file and reloaded the software, you can
restore the configuration information by re-entering the command to enable the protocol (for example, router vrrp ). If you have already
saved the configuration to the startup-config file and reloaded the software, the information is gone.
If you are testing a VRRP or VRRP-E configuration and are likely to disable and re-enable the protocol, you may want to make a backup
copy of the startup-config file containing the protocol configuration information. This way, if you remove the configuration information by
saving the configuration after disabling the protocol, you can restore the configuration by copying the backup copy of the startup-config
file onto the flash memory.
Basic VRRP parameter configuration
To implement a simple VRRP configuration using all the default values, enter the commands shown in the following sections.

Configuration rules for VRRP

• The interfaces of all routers in a VRID must be in the same IP subnet.
• The IP addresses associated with the VRID must already be configured on the router that will be the Owner.
• An IP address associated with the VRID must be on only one router.
• The Hello interval must be set to the same value on the Owner and Backup routers for the VRID.
• The dead interval must be set to the same value on the Owner and Backup routers for the VRID.
• The track priority on a router must be lower than the router VRRP priority. Also, the track priority on the Owner must be higher
than the track priority on the Backup routers.
NOTE
When you use the router vrrp or the ipv6 router vrrp command to enter the VRRP configuration mode, the command prompt
does not change and results in the following general configuration command prompt: (config)# . This differs from entering
the VRRP extended mode, where entering the router vrrp-extended command results in a command prompt such as the
following: (config-vrrpe-router)#. For IPv6 VRRP extended mode, when entering the ipv6 router vrrp-extended
command, this results in a command prompt such as the following: (config-ipv6-vrrpe-router)#.
518
Description
directly forward packets to their destinations
through interfaces on the Backup router if it is
the shortest path to the destination.
Default
FastIron Ethernet Switch Layer 3 Routing
53-1003627-04