5000 Series Layer 2/3 Managed Data Center Switch CLI Reference Guide
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Default
The default is None.
Command Mode
BGP Router Config
11-9
aggregate-address (IPv4 VRF Address Family)
To configure a summaiy address for BGP, use the
aggregate-address
command in Router Configuration
mode. No aggregate addresses are configured by default.
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 refix 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.
Use the
no
command to delete a summary address for BGP. The
address mask
is a summary prefix and
mask.
aggregate-address address mask [as-set] [summary-only]
no aggregate-address address mask
Parameters
address mask
Summary IPv4 prefix and mask. The default route (0.0.0.0 0.0.0.0)
cannot be configured as an aggregate-address. The mask cannot be a
32-bit mask (255.255.255.255). The combination of prefix and mask
must be a valid unicast destination prefix.
as-set
(Optional) If set, the aggregate is advertised with a non-empty
AS_PATH. If the AS_PATH of all contained routes is the same, the
AS_PATH of the aggregate is the AS_PATH of the contained route.
Otherwise, if the contained routes have different AS_PATHs, the
AS_PATH attribute includes an AS_SET with each of the AS numbers
listed in the AS_PATHs of the aggregate routes.
summary-only
(Optional) When the
summary-only
option is given, the more-specific
routes within the aggregate address are not advertised to neighbors.
Default
The default is None.
Command Mode
IPv4 VRF Address Family Config
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