3com 8807 Guide De Référence
498
C
HAPTER
27: BGP C
ONFIGURATION
C
OMMANDS
Description
Use the aggregate command to establish an aggregated record in the BGP
routing table.
routing table.
Use the undo aggregate command to disable the function.
By default, there is no route aggregation.
The keywords are explained as follows:
Example
# Create an aggregated record in BGP routing table.
[3Com-bgp] aggregate 168.328.0.0 255.255.0.0
Balance
Syntax
balance balance-number
undo balance
View
BGP view
Parameter
balance-number: Specifies the number of BGP equivalent routes.
Description
Use the balance command to set the number of BGP equivalent routes currently
supported by the system.
supported by the system.
Use the undo balance command to restore the default number of BGP equivalent
routes.
routes.
By default, the system supports one BGP equivalent route.
Table 69 The use of the keywords
Keyword
Use
as-set
Used to produce an aggregated route, whose AS path information
includes detailed routes. Use this keyword carefully when many AS paths
need to be aggregated, for the frequent change of routes may lead to
route vibration.
includes detailed routes. Use this keyword carefully when many AS paths
need to be aggregated, for the frequent change of routes may lead to
route vibration.
detail-suppresse
d
d
This keyword does not suppress any aggregated route, but it restrains the
advertisement of all the specific routes. If only some specific routes are to
be restrained, use the peer filter-policy command carefully.
advertisement of all the specific routes. If only some specific routes are to
be restrained, use the peer filter-policy command carefully.
suppress-policy Create an aggregated route with this keyword. At the same time, the
advertisement of the specified route is restrained. If you want to restrain
some specific routes selectively and leaves other routes still being
advertised, use the if-match sub-statement of the route-policy
command.
some specific routes selectively and leaves other routes still being
advertised, use the if-match sub-statement of the route-policy
command.
origin-policy
Selects only the specific routes that are in accordance with route-policy to
create an aggregated route.
create an aggregated route.
attribute-policy Sets aggregated route attributes. The same work can be done by using the
peer route-policy command, etc.