Cisco ios xe policy based routing how to#
Cisco ios xe policy based routing software#

Has no explicit route for the destination of the packet. Packets that arrive from the source 172.17.2.2 are sent to the device at 192.168.7.7 if the device Interface 1/0/0 from the source 10.1.1.1 are sent to the device at 172.16.6.6 if the device has no explicit route for theДestination of the packet. The following example provides two sources with equal access to two different service providers.

Cisco ios xe policy based routing how to#

How to Configure Policy-Based Routing Default Next-Hop Routes Once the local device finds a next hop and a usable interface, it routes the packet. They are evaluated in the order shown in the previous table. Set commands can be used with each other. The table below lists the possible numbers and their corresponding Set ip precedence route map configuration command to determine precedence. You can change the precedence setting, using either a number or name (the names came from RFC 791). The device does not honor the precedence bits if queueing is not enabled the packets are sent in FIFO Those headers arrive at another device, the packets are ordered for transmission according to the precedence set, if the queueingДЇeature is enabled. The precedence bits in the IP header can be set in the device when policy-based routing is enabled.

Cisco ios xe policy based routing software#

By default, the Cisco software leaves this value untouched the header remains with The precedence setting in the IP header determines whether, during times of high traffic, the packets are treated with more No match clause in the route map indicates all packets.Д®ntries in the policy route cache, use the If they will be policy-based routed, use either theДЄccess-list-name] command or both in route mapД¬onfiguration mode.

To define the criteria by which packets are examined to learn

To define the route map to be used for policy-based routing, use the route-map map-tag [ sequence-name global configuration command. This ip policy route-map command disables fast switching of all packets arriving on this interface. A packet arriving on the specified interface is subject to policy-based routing. To enable policy-based routing on an interface, indicate which route map the device should use by using the ip policy route-map map-tag command in interface configuration mode.

The route map itself specifies the match criteria and the resulting action if all of the match clauses are met. To enable policy-based routing, you must identify which route map to use for policy-based routing and create the route map. Policy-based routing is a more flexible mechanism for routing packets than destination routing. Possible applications for policy-based routing are to provideД®qual access, protocol-sensitive routing, source-sensitive routing, routing based on interactive versus batch traffic, and

To be routed some way other than the obvious shortest path. You might enable policy-based routing if you want certain packets Map determines which packets are routed to which device next. Policy-based routing (PBR) is a process whereby the device puts packets through a route map before routing them.