Configure a Simple Routing Policy
Purpose
Routing policy allows you to control the information shared with BGP neighbors and provides the opportunity to filter and modify the information you receive. Typically, a network is injected into BGP using a policy. This may also be done through a static route. In the network in BGP Network Topology, a static route export policy is used to inject routes into BGP.
Action
To configure a simple routing policy, follow these steps:
- In configuration mode, go to the following hierarchy level:[edit]user@host# edit routing-options
- Configure a static route for redistribution to other autonomous systems:[edit routing-options]user@host# set static route destination/24 reject
- Configure a routing policy that matches and accepts the configured
static routes into BGP updates:[edit]user@host# edit policy-options [edit policy-options]user@host# set policy-statement policy-name term term-name from route-filter address exact user@host# set policy-statement policy-name term term-name then accept
- Apply the policy created in Step 3 to all BGP neighbors:[edit]user@host# edit protocols bgp [edit protocols bgp]user@host# set export policy-name
- Verify and commit the configuration:user@host# showuser@host# commit
Sample Output
user@R1> edit
Entering configuration mode
[edit]
user@R1# edit routing-options
[edit routing-options]
user@R1# set static route 100.100.1.0/24 reject
[edit routing-options]
user@R1# show
[...Output truncated...]
route 100.100.1.0/24 reject;
}
router-id 10.0.0.1;
autonomous-system 65432;
[edit routing-options]
user@R1# top
[edit]
user@R1# edit policy-options
[edit policy-options]
user@R1# set policy-statement send-statics term statics from route-filter 100.100.1.0/24 exact
[edit policy-options]
user@R1# set policy-statement send-statics term statics then accept
[edit policy-options]
user@R1# top
[edit]
user@R1# edit protocols bgp
[edit protocols bgp]
user@R1# set export send-statics
[edit protocols bgp]
user@R1# show
export send-statics;
group internal {
type internal;
local-address 10.0.0.1;
neighbor 10.0.0.2;
neighbor 10.0.0.3;
neighbor 10.0.0.5;
neighbor 10.0.0.4;
neighbor 10.0.0.6;
}
[edit protocols bgp]
user@R1# commit
commit complete
Meaning
The sample output shows that routing policy send-statics is configured on the router. The routing policy matches and accepts the configured static routes into the routing table and injects the routes into BGP updates. Typically, a routing policy is applied at the group level, although it can be applied at the global level, as shown in this example.
