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main iface vs. sub-iface

Hello,

what is the difference between applying policy-map on main interface or sub-interface? We are using frame relay encapsulation with several PVCs.

2 REPLIES
Blue

Re: main iface vs. sub-iface

if applied on the subInterfaces, policy-maps can set different properties for different PVCs. (multiple policyMaps for multiple subInterfaces)

if a policyMap is applied at the interface level, the entire interface is considered to use that policyMap.

Silver

Re: main iface vs. sub-iface

With frame-relay, the best way to apply service-policies is on the frame-relay shaper.

IE.

map-class frame-relay T1shaper

frame-relay cir 1544000

frame-relay mincir 1544000

frame-relay bc 15440

service-policy output MyPolicy

int s0/0.1 point

frame-relay interface-dlci 201

class T1shaper

Take a look at this doc:

http://www.cisco.com/en/US/tech/tk543/tk545/technologies_tech_note09186a008009489a.shtml

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