Information Technology Reference
In-Depth Information
Route Maps for Controlling Upstream Prefix Advertisement (Continued)
Example 9-7
!
route-map peer_outbound_AS1000 permit 50
match community 24
set as-path prepend 100 100 100 100
!
route-map peer_outbound_AS1000 permit 60
match community 25
set as-path prepend 100 100 100 100 100
!
route-map peer_outbound_AS1000 permit 70
match community 100:3000
!
route-map peer_outbound_AS1000 deny 80
!
ip community-list 20 permit 65000:1000
ip community-list 20 permit 100:220
ip community-list 20 deny
!
ip community-list 21 permit 65100:1000
ip community-list 21 deny
!
ip community-list 22 permit 65200:1000
ip community-list 22 deny
!
ip community-list 23 permit 65300:1000
ip community-list 23 deny
!
ip community-list 24 permit 65400:1000
ip community list 24 deny
!
ip community-list 25 permit 65500:1000
ip community-list 25 deny
!
These route maps are an extension of the prefix origin route maps defined in Example 9-5.
QoS Policy Propagation with BGP
A popular trend among ISPs is to offer multiple levels of service. These levels of service
are typically differentiated by giving customers with a higher service level priority over
lower service levels using IP precedence. This service level applies across the ISP's net-
work, both inbound and outbound. The QoS Policy Propagation via BGP (QPPB) feature
ensures that traffic in both directions is provided with the QoS level the customer has pur-
chased. The ISP network in this example offers three levels of service: gold, silver, and
bronze. These service levels and their associated communities are listed in Table 9-5.
