Information Technology Reference
In-Depth Information
Example 11-6 Configuring FRTS
interface serial 0
encapsulation frame-relay
frame-relay traffic-shaping
!
interface serial 0.1 point-to-point
ip address 192.168.100.5 255.255.255.252
frame-relay interface-dlci 100
frame-relay class 128kb
!
interface serial 0.2 point-to-point
ip address 192.168.100.9 255.255.255.252
frame-relay interface-dlci 200
frame-relay class 512kb
!
map-class frame-relay 128kb
frame-relay traffic-rate 128000 256000
frame-relay adaptive-shaping becn
!
map-class frame-relay 512kb
frame-relay traffic-rate 512000 1024000
frame-relay adaptive-shaping becn
RSVP
For the written test, you must be familiar with RSVP, which is covered in this section.
RSVP is one of the first significant protocols to set up end-to-end QoS over IP. RSVP is a
signaling protocol that enables stations to obtain special qualities of service for their application
data flows. RSVP reserves bandwidth for the network application. RSVP works in conjunction
with routing protocols and installs the equivalent of dynamic access lists along the routes that
routing protocols calculate. RSVP operates in the transport layer of the OSI model. RSVP is
also known as Resource Reservation Setup Protocol. The IETF charter is at the following site:
www.ietf.org/html.charters/rsvp-charter.html. The first standards version of the protocol is in
RFC 2205.
Configuring RSVP
RSVP is enabled with the ip rsvp bandwidth [ interface-kbps ] [ single-flow-kbps ] interface
command. This command starts RSVP and sets the bandwidth and single-flow limits. The
default maximum bandwidth is up to 75 percent of the bandwidth available on the interface. By
default, the amount reservable for a flow can be up to the entire reservable bandwidth of the
interface.
On subinterfaces, the amount reservable for a flow is the most restrictive available bandwidth, which
is the one assigned to the subinterface. A T1 interface that is using Frame Relay has 1.536 Mbps of
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