PBR - Policy Based Routing


When performing [PBR - Policy Based Routing](/pbr-policy-based-routing), it is possible to assign multiple next hop addresses.  However, PBR will not load balance traffic among those addresses.  Instead, it will use the first valid next-hop in the list and send all the traffic to it.

The router will only move to the next next-hop in the list **if the first one becomes unreachable**. In other words, it works in a **failover manner** rather than load balancing.

This is in contrast to [Equal-cost Multi-path routing](/equal-cost-multi-path-routing) which uses dynamic routing protocols 


## Links

https://forum.networklessons.com/t/how-to-configure-policy-based-routing/945/93?u=lagapides

PBR - load balancing

OSPF TTL Security Check

OSPF Troubleshooting

OSPF Type 3 LSA

OSPF Type 4 LSA

OSPF Type 5 LSA

OSPF Type 7 LSA

OSPF Understanding LSA Aging and Refreshing

OSPF Why it is not suitable for use on the Internet

OSPF advertising loopback network

OSPF area inactive

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OSPF area type mismatch

OSPF backbone area 0

OSPF default metric values

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

OSPF immediate hello packet

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

OSPF network types

OSPF non directly connected neighbor adjacencies

OSPF packet types

OSPF point to point network type for Ethernet

OSPF requirements for forming adjacency

OSPF router ID in an IPv6 environment

OSPF router ID

OSPF sham-link cost

OSPF sham-link

OSPF virtual link and ABRs

OSPF where do you configure a virtual link

OSPF why is a backbone area 0 necessary

OSPF within what area is an OSPF router considered to be

OSPF

OSPFv2 and OSPFv3 comparison

OSPFv3 - router ospfv3 command

OSPFv3 communication between routers and next hop addresses

OSPFv3 instance ID

Offset-list

PAT (overloading) maximum number of translations per inside global address

PAgP

PBR - Transport Layer port number

PBR - matching prefix lists

PBR - route-map and ACL deny statements not supported

PBR - set interface command

PBR next hop recursive

PBR next hop verify availability

PBR next-hop and default next-hop

PPPoE

PSTN

PTP - Best Master Clock Algorithm

PTP - Clock Types

PTP - Interface Roles

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PTP - Precision Time Protocol

Passive interface

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Ping

PoE - Understanding Maximum Power

PoE Passive

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PoE over Gigabit Ethernet

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PoE powered device (PD)

PoE what is it

Point-to-Point Protocol (PPP)

Policy Based Routing acts on incoming traffic

Prefix Lists - Operators

Prefix Lists

Private VLANs - across a trunk

Private VLANs - non-operational type

Private WAN

Protocol Data Unit (PDU)

Protocol Independent Multicast (PIM)

Protocols with LFA support

Proxy ARP Best Practices

Pseudowire

PBR - load balancing

Links

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