Cisco Cisco IOS Software Release 12.2(18)S

Your network must support the following Cisco IOS features in order to support guaranteed bandwidth 
services based on DiffServ-aware Traffic Engineering:

MPLS

IP Cisco Express Forwarding (CEF)

OSPF or IS-IS

RSVP-TE

QoS

This section lists the minimum set of commands you need to implement the DiffServ-aware Traffic 
Engineering feature—in other words, to establish a tunnel that reserves bandwidth from the sub-pool.

The 

 presents these same commands in context and shows 

how, by combining them with QoS commands, you can build guaranteed bandwidth services.

DS-TE commands were developed from the existing command set that configures MPLS traffic 
engineering. The only difference introduced to create DS-TE was the expansion of two commands:

ip rsvp bandwidth was expanded to configure the size of the sub-pool on every link.

tunnel mpls traffic-eng bandwidth was expanded to enable a TE tunnel to reserve bandwidth from 
the sub-pool.

The old command was

 x y

where x = the size of the only possible pool, and y = the size of a single traffic flow (ignored by traffic 
engineering)

Now the extended command is

 interface-kbps single-flow-kbps [sub-pool kbps] 

where x = the size of the global pool, and z = the size of the sub-pool.

(Remember, the sub-pool’s bandwidth is less than—because it is part of—the global pool’s bandwidth.)