Advanced Routing Engine - BGP: How to configure route summarization

• This summarization is explained using an example.
• In the network below, the objective is to summarize the BGP advertised routes from 256 subnets (192.168.0.0/24 - 192.168.255.0/24) into a single super network (192.168.0.0/16) for announcement to the ISPs.

• Palo Alto Firewalls
• Supported PAN-OS
• Advanced Routing Engine
• BGP
• Route Redistribution

1. Before summarizing the above routes, we need to configure redistribution. To do so, follow the procedure under  Advanced Routing Engine - BGP: How to configure route redistribution for the necessary steps. 
2. To summarize the route, navigate to Network > Routing > Logical Router > [Logical_Router_Name] > BGP > Aggregate Route > Add, and use the following parameters:
   1. Name: Supernet_192.168
   2. Enable: check
   3. Summary Only: check
   4. Aggregate Same MED Only: check
   5. Summary Prefix: 192.168.0.0/16

3. Click OK twice and then Commit to save.
4. To verify, go to the firewall's CLI and execute the following command:

admin@PA-3250-ENT> show advanced-routing bgp peer advertised-routes peer-name ISP1 | match 192.168
*> 192.168.0.0/16       0.0.0.0                        100  32768  ?
admin@PA-3250-ENT>