3Com 8807 Configuration Manual page 374

374 C 33: BGP C
HAPTER ONFIGURATION
Configuring BGP Route
Filtering
Automatic aggregation (by means of the summary command): The
■
aggregation of IGP subnet routes imported by the BGP. With automatic
aggregation enabled, the BGP will not receive subnet routes imported from the
IGP, and routes on natural network segments will be aggregated;
Manual aggregation (by means of the aggregate command): The aggregation
■
of the BGP local routes. In general, the preference of manual aggregation is
higher than that of automatic aggregation.
Perform the following configuration in BGP view.
Table 372 Configure BGP route aggregation
Operation
Enable automatic aggregation
of subnet routes
Disable automatic aggregation
of subnet routes
Enable local route aggregation
Disable local route aggregation
By default, the BGP does not perform local route aggregation.
Configuring BGP to filter the received route information
The routes received by the BGP can be filtered, and only those routes that meet
the certain conditions will be received by the BGP.
Perform the following configuration in BGP view.
Table 373 Configure imported route filtering
Operation
Filter received routing information advertised
by specified address
Disable filtering of received routing
information advertised by specified address
Filter received global routing information
Disable filtering of received global routings
information
By default, the BGP does not filter the received routes.
Configuring to filter the routes advertised by other protocols
Perform the following configuration in the BGP view.
Table 374 Configure to filter the routes advertised by other routing protocols
Operation
Configure to filter the routes advertised by
other routing protocols
Command
summary
undo summary
aggregate address mask [ as-set | attribute-policy
route-policy-name | detail-suppressed | origin-policy
route-policy-name | suppress-policy route-policy-name ]*
undo aggregate address mask [ as-set | attribute-policy
route-policy-name | detail-suppressed | origin-policy
route-policy-name | suppress-policy route-policy-name ]*
Command
filter-policy gateway ip-prefix-name import
undo filter-policy gateway ip-prefix-name
import
filter-policy { acl-number | ip-prefix
ip-prefix-name } import
undo filter-policy { acl-number | ip-prefix
ip-prefix-name } import
Command
filter-policy { acl-number | ip-prefix
ip-prefix-name } export [ routing-protocol ]