•
summary-only
aggregate address are not advertised to neighbors.
Default Configuration
No aggregate addresses are configured by default. Unless the options are
specified, the aggregate is advertised with the ATOMIC_AGGREGATE
attribute and an empty AS path, and the more specific routes are advertised
along with the aggregate.
Command Mode
•
BGP Router Configuration mode
•
IPv6 Address Family Configuration mode
User Guidelines
To be considered a match for an aggregate address, a prefix must be more
specific (i.e., have a longer prefix length) than the aggregate address. A prefix
whose prefix length equals the length of the aggregate address is not
considered a match.
When BGP originates a summary address, it installs a reject route in the
common routing table for the summary prefix. Any received packets that
match the summary prefix but not a more specific route match the reject
route and are dropped.
BGP accepts up to 128 summary addresses for each address family.
Command History
Introduced in version 6.2.0.1 firmware.
Example
console(config-router)#aggregate-address 10.27.21.0 255.255.255.0
bgp aggregate-different-meds (BGP Router
Configuration)
Use the bgp aggregate-different-meds command to control the aggregation of
routes with different multi-exit discriminator (MED) attributes. By default,
BGP only aggregates routes that have the same MED value.
When specified, the more-specific routes within the
–
Layer 3 Routing Commands
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