HP HPE FlexNetwork MSR Router Series Configuration Manual page 226

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Step
1.
Enter system view.
2.
Enable BGP and enter BGP
view.
3.
Enter BGP-VPN instance
view.
4.
Configure the CE as the VPN
EBGP peer.
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 view.
3.
Configure the PE as a BGP
peer.
Command
system-view
bgp as-number
ip vpn-instance
vpn-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 ]
* ]
peer { group-name | ip-address
[ mask-length ] } allow-as-loop
[ number ]
Command
system-view
bgp as-number
peer { group-name | ip-address
[ mask-length ] } as-number
216
Remarks
N/A
N/A
Configuration commands in
BGP-VPN instance view are
the same as those in BGP
view. For more information,
see Layer 3—IP Routing
Configuration Guide.
By default, no BGP peer is
configured.
For more information about
BGP peers and peer groups,
see Layer 3—IP Routing
Configuration Guide.
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 peer is
created.

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