Policy Framework Configuration Guide - Juniper Networks

Junos 10.4 Policy Framework Configuration Guide
In this example, the ISP policies are configured in an outbound direction; that is, the
example focuses on the routes that the ISP announces to its peers and customers, and
includes the following:
1. The ISP has been assigned AS 1000 and the routing space of 192.168.0/17. With the
exception of the two customer networks shown in Figure 11 on page 83, all other
customer routes are simulated with static routes.
2. The ISP has connectivity to two different exchange peers: AS 11111 and AS 22222. These
peers are used for transit service to other portions of the Internet. This means that the
ISP is accepting all routes (the full Internet routing table) from those BGP peers. To
help maintain an optimized Internet routing table, the ISP is configured to advertise
only two aggregate routes to the transit peers.
3. The ISP also has direct connectivity to two private peers: AS 7000 and AS 8000. The
ISP administrators want all data to the private peers to use this direct link. As a result,
all the customer routes from the ISP are advertised to those private peers. These peers
then advertise all their customer routes to the ISP.
4. Finally, the ISP has two customers with which it communicates using BGP: AS 1234
and AS 2468. Each customer has a different set of requirements.
The following sections discuss the following topics:
• Requesting a Single Default Route on the Customer 1 Router on page 84
• Requesting Specific Routes on the Customer 2 Router on page 85
• Configuring a Peer Policy on ISP Router 3 on page 87
• Configuring Private and Exchange Peers on ISP Router 1 and 2 on page 89
• Configuring Locally Defined Static Routes on the Exchange Peer 2 Router on page 92
• Configuring Outbound and Generated Routes on the Private Peer 2 Router on page 93
Requesting a Single Default Route on the Customer 1 Router
Customer 1 has only a single route to the ISP and is using the ISP for transit service. This
customer has requested a single default route (0.0.0.0/0) from the ISP.
[edit]
interfaces {
so-0/0/1 {
description "Connection to ISP Router 3";
unit 0 {
family inet {
address 10.222.70.1/30;
}
}
}
fxp0 {
description "MGMT INTERFACE - DO NOT DELETE";
unit 0 {
family inet {
address 10.251.0.9/24;
}
}
84
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