VRRP can prevent loss of network connectivity to end hosts if the static default IP gateway fails. By implementing VRRP, you can designate a number of routers as backup routers in the event that the default master router fails. VRRP fully supports Virtual Local Area Networks (VLANs) and stacked VLANs (S-VLANs).
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Note: The term virtual router as defined in Configuring Virtual Routers in JUNOSe System Basics Configuration Guide, is different from what is implied by VRRP. In this chapter, the term virtual router always refers to a VRRP router; that is, a router that has enabled VRRP. |
In case of a failure, VRRP dynamically shifts the packet-forwarding responsibility to a backup router. VRRP creates a redundancy scheme which enables hosts to keep a single IP address for the default gateway but maps the IP address to a well-known virtual MAC address. VRRP provides this redundancy without user intervention or additional configuration at the end hosts.
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