4-23
Cisco AVVID Network Infrastructure Enterprise Quality of Service Design
956467
Chapter 4 QoS in an AVVID-Enabled Wide-Area Network
QoS Recommendations for WAN Aggregation Routers
interface ATM4/0.60 point-to-point
pvc BRANCH#60 0/60
vbr-nrt 256 256
This command sets the high ATM AAL5 traffic contract.
tx-ring-limit 3
This command reduces the delay caused by the TX ring buffer.
protocol ppp Virtual-Template60
This command binds the virtual template to the PVC.
!
interface Virtual-Template60
bandwidth 256
ip address 10.200.60.1 255.255.255.252
service-policy output WAN-EDGE
This command sets the MQC policy for voice and data.
ppp multilink
ppp multilink fragment-delay 10
This command sets the maximum delay.
ppp multilink interleave
This command enables MLP LFI.
Example 4-15 Remote-Branch Router Frame Relay Configuration
ip cef
!
...
!
interface Serial6/0
description Parent FR Link for BRANCH#60
no ip address
encapsulation frame-relay
frame-relay traffic-shaping
!
interface Serial6/0.60 point-to-point
description FR Sub-Interface for BRANCH#60
bandwidth 256
frame-relay interface-dlci 60 ppp Virtual-Template60
class FRTS-256kbps
!
interface Virtual-Template60
bandwidth 256
ip address 10.200.60.2 255.255.255.252
service-policy output WAN-EDGE
This command sets the MQC policies for voice and data.
ppp multilink
ppp multilink fragment-delay 10
This command sets the maximum delay.
ppp multilink interleave
This command enables MLP LFI
.
!
...
!
map-class frame-relay FRTS-256kbps
frame-relay cir 252832
frame-relay bc 2530
frame-relay be 0
frame-relay mincir 252832
no frame-relay adaptive-shaping
Considerations for MLPoATM and MLPoFR
When using MLP over ATM and MLP over Frame Relay, keep the following in mind:
·
MLPoATM can only be supported on platforms that support per-VC traffic shaping (such as ATM
Enhanced Port Adaptors for the 7200/7500 and OC3 Network Modules for the 3600).
·
MLPoATM requires the MLP bundle to classify the outgoing packets before they are sent to the
ATM VC. It also requires that the per-VC queuing strategy for the ATM VC to be FIFO.
·
MLP over Frame Relay relies on the FRTS engine to control the flow of packets from MLP bundle
to FR VC.
·
cRTP is only supported over ATM links as of IOS 12.2(2)T