So, the VRRP "owner" will send regular messages to the VRRP "backup" to keep it suppressed.
The Owner has 10.1.1.1 on VLAN 100 and so any device on VLAN100 that uses 10.1.1.1 as a default gateway or router address will get its traffic routed by that address.
The Backup has 10.1.1.2 on VLAN100 and it functions perfectly well as a layer3 device using 10.1.1.2, but it does nothing with packets addressed to 10.1.1.1.
If the Backup stops getting messages from the Owner, it will start responding to packets on VLAN100 aimed at 10.1.1.1 and essentially take over routing for the VLAN.
- The VLAN ID and the VRRP VRID do not have to match. I like it to because I think it looks good. Depends on your VLAN design.
- Your VRRP VRID has to be in the range 1-255, so you can have many more VLANs than VRIDs. You can use a single VRID for all your VLANs, or you can use seperate ones for each VLAN, up to a maximum of 255 VRIDs.