PBR - Policy Based Routing


When implementing Policy Based Routing, the `set ip default next-hop` and the `set ip next-hop` commands perform two different functions.  These are described in detail below:

The `set ip default next-hop` command verifies the existence of the destination IP address in the routing table, and…

- if the destination IP address exists, the command does not policy route the packet, but forwards the packet based on the routing table.
- if the destination IP address does not exist, the command policy routes the packet by sending it to the specified next hop.

The `set ip next-hop` command verifies the existence of the next hop specified, and…

- if the next hop exists in the routing table, then the command policy routes the packet to the next hop.
- if the next hop does not exist in the routing table, the command uses the normal routing table to forward the packet.


PBR next-hop and default next-hop

OSPF Virtual Link Network Type Considerations

OSPF Why it is not suitable for use on the Internet

OSPF advertising loopback network

OSPF area inactive

OSPF area notation

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 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 Prefix Information Separation

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 - load balancing

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

PPPoE

PSTN

PTP - Best Master Clock Algorithm

PTP - Clock Types

PTP - Interface Roles

PTP - Offset and Delay times

Passive interface

Physical layer - Copper medium

Physical layer - Optical fiber medium

Physical layer - Wireless medium

Physical layer - encoding

Physical layer - media

Physical layer - modem

Physical layer - modulation

Physical layer Carrier Wave

Ping - Specify ToS

Ping - common reasons for failure

Ping - debug commands

Ping - extended feature

Ping - possible ping responses

Ping - specifying size

Ping - sweep range of sizes

Ping - troubleshooting concepts

Ping

PoE - Understanding Maximum Power

PoE Passive

PoE Standards-based

PoE over Gigabit Ethernet

PoE power sourcing equipment (PSE)

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

Public Key Certificate

Public vs Private AS with multiple ISPs

Python - Parsing output of show commands

Python - Performing Tasks Concurrently

Python - viewing code using trinket.io

Python Paramiko SSH

Python stdin, stdout, stderr

PBR next-hop and default next-hop

Links to this page: