H3C Technologies H3C S7500E Series Switches - Manual (Page 224)

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Controlling Route Generation
Different from IGP, BGP focuses on route generation and advertisement control and optimal route
selection.
There are to ways to generate BGP routes:
z Configure BGP to advertise local networks
z Configure BGP to redistribute routes from other routing protocols, including the default route
Prerequisites
BGP connections have been created.
Injecting a Local Network
In BGP view, you can inject a local network to allow BGP to advertise it to BGP peers. The origin
attribute of routes advertised in this way is IGP. You can also reference a route policy to flexibly control
route advertisement. The network to be injected must be available in the local IP routing table.
Follow these steps to inject a local network:
To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —
Inject a network to the BGP routing
table
network ip-address [ mask |
mask-length ] route-policy
route-policy-name
Optional
Not injected by default
Configuring BGP Route Redistribution
BGP does not find routes by itself. Rather, it redistributes routing information in the local AS from other
routing protocols. During route redistribution, you can configure BGP to filter routing information from
specific routing protocols.
The origin attribute of routes redistributed using the import-route command is Incomplete.
Follow these steps to configure BGP route redistribution:
To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —
Enable route redistribution from a
routing protocol into BGP
import-route protocol [ process-id
| all-processes ] [ med med-value
| route-policy route-policy-name ]
*
Required
Not enabled by default