Design Reference

VRF Lite architecture examples
VRF Lite enables a router to act as many routers. This provides virtual traffic separation for
each user and provides security. For example, you can use VRF Lite to
• provide different departments within a company with site-to-site connectivity as well as
Internet access
• provide centralized and shared access to data centers.
The following figure shows how VRF Lite can emulate VPNs.
Figure 14: VRF Lite example
The following figure shows how VRFs can interconnect through an external firewall.
Figure 15: Inter-VRF forwarding based on external firewall
Although customer data separation into Layer 3 virtual routing domains is usually a
requirement, sometimes customers must access a common network infrastructure. For
Layer 3 network design
56 Network Design Reference for Avaya VSP 4000 February 2014
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