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Cisco AVVID Network Infrastructure Enterprise Quality of Service Design
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Chapter 4 QoS in an AVVID-Enabled Wide-Area Network
QoS Recommendations for WAN Aggregation Routers
interface Serial0/0
description MLP GROUP 40 Member
bandwidth 1536
no ip address
encapsulation ppp
ppp multilink
multilink-group 40
The following commands can be used to verify that a voice, video and data QoS policies have been
applied correctly to a MLP interface.
·
show policy
·
show policy interface
·
show interface
·
show queue
For more information, see the
illustrates how MQC policies can be applied to a high-speed PPP link.
Example 4-4
High-Speed PPP Link
interface Serial0/1
description PPP Link to BRANCH#40
bandwidth 1536
ip address 10.200.40.1 255.255.255.252
encapsulation ppp
service-policy output WAN-EDGE
This command applies the MQC policy to the interface.
illustrates how MQC policies can be applied to a high-speed HDLC link.
Example 4-5
High-Speed HDLC Link
interface Serial0/1
description HDLC Link to BRANCH#40
ip address 10.200.40.1 255.255.255.252
service-policy output WAN-EDGE
This command applies the MQC policy to the interface.
Slow-Speed Point-to-Point Links
For slow-speed point-to-point WAN links, link-fragmentation and interleaving is required to minimize
serialization delay. MLP must be used on PPP links below 768 kbps, as MLP LFI is the only mechanism
for reducing serialization delay on point-to-point links.
Enabling LFI on MLP links requires two additional commands, as shown in
.
Note
Optionally, cRTP can be implemented on slow point-to-point links. cRTP is best utilized on slow-speed
links after the CPU performance impact has been evaluated.
For more information on cRTP, see
Provided the bandwidth savings and overall network design justify implementing cRTP, the following
commands can be used.