209
To do…
Use the command…
Remarks
Enable route redistribution from a
routing protocol into BGP
import-route
protocol
[ {
process-id
|
all-processes
} [
allow-direct
|
med
med-value
|
route-policy
route-policy-name
] * ]
Required
Not redistributed by default
The
allow-direct
keyword is
available only when the specified
routing protocol is OSPF.
Enable default route redistribution
into BGP
default-route imported
Optional
Not enabled by default
Controlling route distribution and reception
Configuration prerequisites
BGP connections must be 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 automatic and manual summarization modes. Manual
summary routes have 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 cannot be summarized.
Follow these steps to configure automatic route summarization:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter BGP view
bgp
as-number
—
Configure automatic route
summarization
summary automatic
Required
Not configured by
default.
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…
Use the command…
Remarks
Enter system view
system-view
—
Enter BGP view
bgp
as-number
—
