UMN:CLI User Manual
V5808
512
11.1.1.8 BGP Aggregation
To set the BGP option to perform aggregation only when next-hop matches the specified
IP address, use the following command.
bgp aggregate-nexthop-check
Performs the BGP aggregation only when next-hop
matches the specified IP address.
no bgp aggregate-nexthop-
check
Disables the configured BGP aggregation.
11.1.1.9 BGP Path Selection
To set the RFC1771 compatible path selection mechanism, use the following command.
Sets the RFC1771 compatible path selection
mechanism.
no bgp rfc1771-path-select
Deletes the configured RFC1771 compatible path
selection mechanism.
To configure the strict RFC1771 setting, use the following command.
Sets the strict RFC1771 setting.
Deletes the configured strict RFC1771 setting.
11.1.2 Advanced Configuration
The V5808 is possibly configured for the additional configurations related BGP.
11.1.2.1 Summary of Path
Aggregation combines the characteristics of several different routes and advertises a
single route. In the example of 2 routes information of 172.16.0.0/24 and 172.16.1.0/24,
the as-set parameter creates an aggregate entry advertising the path for a single route of
172.16.0.0/23, consisting of all elements contained in all paths being summarized. Use
this feature to reduce the size of path information by listing the AS number only once,
even if it was included in multiple paths that were aggregated. And it’s useful when
aggregation of information results in incomplete path information.
Using the summary-only parameter transmits the IP prefix only, suppressing the more-
specific routes to all neighbors. Using the as-set parameter transmits a single AS path
information only, one of AS numbers of each path.
To summarize route’s information for the transmission, use the following command.
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