Netgear M5300-28G (GSM7228S) - ProSAFE 24-port Gigabit L2+ Managed Stackable Switch 管理者ガイド

The same phenomenon applies to ACLs specified in the match clause of PBR. That is, if a 
PBR route map is applied on a VLAN interface, any packet coming with a corresponding 
VLAN ID on any port is matched against PBR rules corresponding to the match ACL clause 
and the corresponding set actions are taken into effect. To perform policy-based routing 
based on VLAN ID as the matching criteria for incoming packets, apply an ACL rule on the 
VLAN interface, but do not configure a rule with the VLAN ID as the match condition. 

PBR supports the preconfiguration of the route map on routing interfaces. If routing is not 
enabled on an interface, the route map can still be applied on that particular interface. When 
routing is not enabled on an interface, route-map configuration is not pushed into hardware. 
Rather, it is maintained only in configuration. As soon as routing is enabled on that particular 
interface, configuration is applied to hardware.

Network administrators can use PBR when load sharing must be done for the incoming traffic 
across multiple paths based on packet entities in the incoming traffic.

Normally, to optimally utilize the data networks of the organization, the bulk traffic associated 
with the company activity must use a higher-bandwidth, high-cost (price of link) link while the 
basic connectivity continues over a lower bandwidth, low-cost link for interactive traffic. For 
such applications, policy-based routing is the right fit. 

Consider the network that is composed of two groups with different IP address ranges. If 
group1 addresses must be routed through ISP1 and group2 addresses must be routed 
through ISP2, the switch that is connected with different groups must be policy routed. 
Configure a match in the route map on the IP address range of different groups. This way, an 
equal access as well as source IP address-sensitive routing is achieved through PBR.