HP FlexNetwork 10500 Series Configuration Manual page 216

Step
5. Create the BGP-VPN IPv4
unicast family and enter its
view.
6. Enable IPv4 unicast route
exchange with the
specified peer or peer
group.
7. Redistribute the routes of
the local CE.
8. (Optional.) Allow the local
AS number to appear in the
AS_PATH attribute of a
received route, and set the
maximum number of
repetitions.
2. Configure the CE:
Step
1. Enter system view.
2. Enter BGP instance view.
3. Configure the PE as a BGP
peer.
4. Create the BGP IPv4
unicast family and enter its
view.
5. Enable IPv4 unicast route
exchange with the
specified peer or peer
group.
6. (Optional.) Configure route
redistribution.
Command
address-family ipv4 [ unicast ]
peer { group-name | ip-address
[ mask-length ] } enable
import-route protocol
[ { process-id | all-processes }
[ allow-direct | med med-value
| route-policy
route-policy-name ] * ]
peer { group-name | ip-address
[ mask-length ] } allow-as-loop
[ number ]
Command
system-view
bgp as-number [ instance
instance-name ]
peer { group-name | ip-address
[ mask-length ] } as-number
as-number
address-family ipv4 [ unicast ]
peer { group-name | ip-address
[ mask-length ] } enable
import-route protocol
[ { process-id | all-processes }
[ allow-direct | med med-value
| route-policy
route-policy-name ] * ]
207
Remarks
By default, the BGP-VPN IPv4
unicast family is not created.
By default, BGP does not
exchange IPv4 unicast routes
with any peer.
A PE must redistribute the
routes of the local CE into its
VPN routing table so it can
advertise them to the peer PE.
By default, BGP discards
incoming route updates that
contain the local AS number.
BGP detects routing loops by
examining AS numbers. In a
hub-spoke network where
EBGP is running between a PE
and a CE, the routing
information the PE advertises to
a CE carries the AS number of
the PE. Therefore, the route
updates that the PE receives
from the CE also include the AS
number of the PE. This causes
the PE to be unable to receive
the route updates. In this case,
you must configure this
command to allow routing loops.
Remarks
N/A
N/A
By default, no BGP peers exist.
By default, the BGP IPv4
unicast family is not created.
By default, BGP does not
exchange IPv4 unicast routes
with any peer.
A CE must redistribute its routes
to the PE so the PE can
advertise them to the peer CE.