Controlling Route Distribution And Reception - HP 4800G Series Configuration Manual

To do...
Enable route redistribution from
a routing protocol into BGP
Enable default route
redistribution into BGP

Controlling Route Distribution and Reception

Prerequisites
BGP connections have been created.
Configuring BGP Route Summarization
To reduce the routing table size on medium and large BGP networks, you need to configure route
summarization on BGP routers. BGP supports two summarization modes: automatic and manual.
Manual summary routes enjoy a higher priority than automatic ones.
Configure automatic route summarization
After automatic route summarization is configured, BGP summarizes redistributed IGP subnets to
advertise only natural networks. Routes injected with the network command can not be summarized.
Follow these steps to configure automatic route summarization:
To do...
Enter system view
Enter BGP view
Configure automatic route
summarization
Configure manual route summarization
By configuring manual route summarization, you can summarize both redistributed routes and routes
injected using the network command and determine the mask length for a summary route as needed.
Follow these steps to configure BGP manual route summarization:
To do...
Enter system view
Enter BGP view
Configure manual route
summarization
Use the command...
import-route protocol
[ process-id | all-processes ]
[ med med-value |
route-policy
route-policy-name ] *
default-route imported
Use the command...
system-view
bgp as-number
summary automatic
Use the command...
system-view
bgp as-number
aggregate ip-address { mask |
mask-length } [ as-set | attribute-policy
route-policy-name | detail-suppressed |
origin-policy route-policy-name |
suppress-policy route-policy-name ]*
1-21
Remarks
Required
Not redistributed by default
Optional
Not enabled by default
Remarks
—
—
Required
Not configured by default.
Remarks
—
—
Required
Not configured by
default.