D-Link DGS-6600-48T Configuration Guide - Page 331

Volume 4-Layer 3 Configurations / Chapter 31-Policy Based Route Map (PBR) Chapter Overview Chapter 31 Policy Based Route Map (PBR) Chapter Overview The following topics are included in this chapter, please go to the topic for more detailed information: • Chapter Overview • Usage Guideline • The Benefits of Policy-Based Routing • Cost Savings • Load Sharing • Differentiation between PBR and Static Route • PBR Configuration Commands • The Concept of Policy base route • Configuration example • PBR Configuration Example An Introduction to Policy Based Route Map Policy-Based Routing (PBR) provides a mechanism for expressing and implementing forwarding / routing /deny of data packets based on the policies defined by the network administrators. Example: User want a packet with a destination of 10.1.1.1 should go out interface eth1/0. You could create a policy so that packets destined to 10.1.1.1, instead, go out interface eth1/0. Or, you could make this happen ONLY when the source of that packet was 192.168.1.1. With PBR you get the option to implement policies that selectively cause packets to take different paths. Additionally, PBR can mark packets so that certain types of traffic get prioritized. Policy Base Route is a kind of static route.The different is static route is base on "destination" but policy base route is base on "source". The Benefits of Policy-Based Routing PBR have following benefits: Source-Based Transit Provider Selection. Internet service provider (ISP) can use policy-based routing to route traffic originating from different sets of users through different Internet connections across the policy routers DGS-6600 Configuration Guide 331