PBR - Policy Based Routing


When employing policy-based [routing](/routing) (PBR), the `set ip next-hop verify-availability` command can be used to verify the reachability of the next hop of a [Route-map](/route-map) before the router performs policy routing to that next hop.  This is achieved either using CDP or using object tracking.

## Links

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_pi/command/iri-cr-book/iri-cr-s1.html#wp8093935770

https://forum.networklessons.com/t/how-to-configure-policy-based-routing/945/69?u=lagapides

https://networklessons.com/cisco/ccie-enterprise-infrastructure/how-to-configure-policy-based-routing/

PBR next hop verify availability

OSPF Type 7 LSA

OSPF Understanding LSA Aging and Refreshing

OSPF Why it is not suitable for use on the Internet

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OSPF design - when to create a new area

OSPF does not redistribute default route

OSPF downheap LSA

OSPF duplicate router IDs

OSPF extent of reconvergence process

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OSPF in a GRE multipoint environment

OSPF loop prevention

OSPF message options field

OSPF metric sum of outgoing interface costs

OSPF modifying the router ID

OSPF network command

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OSPF packet types

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OSPF requirements for forming adjacency

OSPF router ID in an IPv6 environment

OSPF router ID

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OSPF sham-link

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OSPF why is a backbone area 0 necessary

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OSPF

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OSPFv3 communication between routers and next hop addresses

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PBR - load balancing

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PBR next hop recursive

PBR next-hop and default next-hop

PPPoE

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PBR next hop verify availability

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