H3C S6800 Series Configuration Manual page 17

Step
7. Allow the local AS number
to appear in the AS_PATH
attribute of routes received
from the peer, and set the
maximum number of
repetitions.
8. Redistribute remote site
routes advertised by the PE
into BGP.
9. (Optional.) Configure
filtering of advertised
routes.
10. (Optional.) Configure
filtering of received routes.
2. Configure a VPN site:
Step
1. Enter system view.
2. Enter BGP view.
3. Configure the MCE as an
EBGP peer.
4. Enter BGP-VPN IPv4 unicast
address family view.
5. Enable BGP to exchange
IPv4 unicast routes with the
peer.
6. Redistribute the IGP routes
of the VPN into BGP.
Configuring IBGP between MCE and VPN site
To run IBGP between an MCE and a VPN site, you must configure a BGP peer for each VPN instance on
the MCE, and redistribute the IGP routes of each VPN instance on the VPN site.
Command
peer { group-name | ip-address }
allow-as-loop [ number ]
import-route protocol [ { process-id
| all-processes } [ allow-direct |
med med-value | route-policy
route-policy-name ] * ]
filter-policy { acl-number |
prefix-list prefix-list-name } export
[ protocol process-id ]
filter-policy { acl-number |
prefix-list prefix-list-name } import
Command
system-view
bgp as-number
peer { group-name | ip-address }
as-number as-number
address-family ipv4 [ unicast ]
peer { group-name | ip-address }
enable
import-route protocol
[ { process-id | all-processes }
[ allow-direct | med med-value |
route-policy route-policy-name ]
* ]
10
Remarks
By default, BGP discards
incoming route updates that
contain the local AS number.
BGP detects routing loops by
examining AS numbers. The
routing information the MCE
advertises to a site carries the
local AS number. Therefore, the
route updates that the MCE
receives from the site also
include the local AS number.
This causes the MCE to be
unable to receive the route
updates. In this case, you must
configure this command to
allow routing loops.
By default, no routes are
redistributed into BGP.
By default, BGP does not filter
advertised routes.
By default, BGP does not filter
received routes.
Remarks
N/A
N/A
N/A
N/A
By default, BGP does not
exchange IPv4 unicast routes
with any peer.
By default, no routes are
redistributed into BGP.
A VPN site must advertise the
VPN network addresses it can
reach to the connected MCE.