ZyXEL Communications Dimension ES-4124 L3 Support Notes page 86

handles all packets while the others are backup devices. When the master one
fails, the backup device with highest priority will take over the packet handling.
Terminology:
• VRRP Router: A router running the Virtual Router Redundancy
Protocol.
• Virtual Router: An abstract object managed by VRRP that acts as a
default router for hosts on a shared LAN.
Virtual Router Master: VRRP Router with forwarding responsibility of a
•
VR.
Virtual Router Backup: Set of VRRP Routers available to assume
•
forwarding responsibility when VR Master fails.
When do you need it?
VRRP is a L3 virtual routing protocol. For a network administrator, to ensure
serice/network always available without down time at gateway, VRRP can
benefit this and further provide load sharing if more than one uplink is applied.
Scenario 1 -- Redundancy
The network administrator Peter of ZyCompany wants to ensure the high
available of their server farm from LAN users. According to vendor's
recommendation, they buy two ZyXEL ES-4024 switches and have the
configuration step by step as following.
All contents copyright (c) 2006 ZyXEL Communications Corporation.
ES-4124 Support Notes
86