5000 Series Layer 2/3 Managed Data Center Switch CLI Reference Guide
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11-51 neighbor default-originate (BGP Router Config)
To configure BGP to originate a default route to a specific neighbor, use the
neighbor default-originate
command in BGP router configuration mode. Use the optional
if-default-present
parameter to originate
the default route to a specific neighbor only if the default route exists in the routing table.
By default, a neighbor-specific default has no MED and the Origin is IGP. Attributes may be set using an
optional route map. A neighbor configured with the default-originate is placed in a separate update group
from the neighbors that are not configured with this command which means the global default-originate
command does not affect the neighbors configured with this command. The global default-originate
command is overridden by the default-originate setting for a neighbor if enabled. The AS-PATH sent in
the default route update sent to the neighbor as a result of this command includes only the originator's AS.
Giving the optional if-default-present tells to originate the default route to this neighbor only if the default
route is present in the routing table. This form of default origination does not install a default route in the
Adj RIB Out for the update group of peers so configured (it will not appear in
show ip bgp neighbor
advertised-routes
).
A route map may be configured to set attributes on the default route sent to the neighbor. If the route map
includes a
match ip-address
term, that term is ignored. If the route map includes
match community
or
match as-path
terms, the default route is not advertised. If there is no route map with the route map
name given, the default route is not advertised.
Use the
no
command to prevent BGP from originating a default route to a specific neighbor.
neighbor ip-address default-originate [if-default-present] [route-map map-name]
no neighbor ip-address default-originate [if-default-present] [route-map map-name]
Parameters
ip-address
The neighbor’s IPv4 address.
if-default-present
(Optional) Use to route the originate default route to a specific neighbor
only when the default route exists in the routing table.
route-map map-name
(Optional) A route map may be configured to set attributes on the default
route advertised to the neighbor.
Default
The default is No Default originated.
Command Mode
BGP Router Config
11-52 neighbor default-originate (IPv4 VRF Address Family Config)
To configure BGP to originate a default route to a specific neighbor, use the
neighbor default-originate
command in IPv4 VRF Address Family Config mode. Use the optional
if-default-present
parameter to
originate the default route to a specific neighbor only if the default route exists in the routing table.
By default, a neighbor-specific default has no MED and the Origin is IGP. Attributes may be set using an
optional route map. A neighbor configured with the default-originate is placed in a separate update group
from the neighbors that are not configured with this command which means the global default-originate
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