Cisco 10000 Series Configuration Manual page 345

Chapter 18 Configuration Examples
Router(config)# router bgp 200
Router(config-router)# network 130.4.0.0
Router(config-router)# end
Router# config terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# router bgp 200
Router(config-router)# network 130.5.0.0
Router(config-router)# end
Router#
Example 3: Quality of Service Policy Propagation Using Border
Gateway Protocol
QoS Policy Propagation using Border Gateway Protocol (QPPB) allows you to classify packets by IP
precedence based on BGP community lists, BGP autonomous system paths, and access lists. After a
packet has been classified, you can use other QoS features such as committed access rate (CAR) and
weighted random early detection (WRED) to specify and enforce policies to fit your business model.
The following example shows how to
1.
2.
In this example, the Cisco 10000 series router learns routes from autonomous system (AS) 10 and AS 60.
QoS policy is applied to all packets that match the defined route maps. Any packets from the Cisco 10000
series router to AS 10 or AS 60 are sent to the appropriate QoS policy
Figure 18-1
Cisco 10000 Series Router Configuration
Router(config)# router bgp 30
Router(config)# table-map precedence-map
Router(config-router)# neighbor 20.20.20.1 remote-as 10
Router(config-router)# neighbor 20.20.20.1 send-community
Router(config-router)# neigh 20.20.20.1 route-map precedence-map out
!
Router(config)# ip bgp-community new-format
Match community 1, set the IP precedence to priority, and set the QoS group to 1.
Router(config)# route-map precedence-map permit 10
Router(config-route-ma)# match community 1
OL-8834-04
Create route maps to match BGP community lists, access lists, and BGP AS paths
Apply IP precedence to routes learned from neighbors
Cisco 10000 Series Router Routes and QoS Policy Application
2. Route arrives
3. QoS policy applied
Cisco
10000
series
Autonomous
system 30
4. Packet sent with QoS policy
Example 3: Quality of Service Policy Propagation Using Border Gateway Protocol
1. Route announced
Router
B
Autonomous
system 10
Cisco 10000 Series Router Line Card Configuaration Guide
(Figure 18-1).
Autonomous
system 60
18-5