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Policy-based Routing (PBR)Policy-based Routing is supported on the MXL platform.
This chapter covers the following topics:
• Overview
• Implementing Policy-based Routing with Dell Networking OS
• Configuration Task List for Policy-based Routing
• Sample Configuration
Overview
Policy-based Routing (PBR) enables you to make routing decisions based on policies applied to a specific
interface. When a router receives a packet it normally decides where to forward it based on the
destination address in the packet, which is used to look up an entry in a routing table. However, in some
cases, there may be a need to forward the packet based on other criteria: size, source, protocol type,
destination, etc. For example, a network administrator might want to forward a packet that uses TCP
across a different next-hop than packets using ICMP.
Rules for PBR can also be a combination of things:
When the packet comes from this source and wants to go to that destination then route it to next-hop or
onto that specific interface. This permits routing over different links or towards different networks even
while the destination is the same but depending on where the packet originates.
658 Policy-based Routing (PBR)