3com S7906E 설치 설명서
1-36
Refer to
.
In the inter-provider VPN option A solution, for the same VPN, the VPN targets for the VPN instances of
the PEs must match those for the VPN instances of the ASBR-PEs in the same AS. It is not required for
PEs in different ASs.
Configuring Inter-Provider VPN Option B
Follow these steps to configure inter-provider VPN option B on ASBR PEs:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter interface view for the
interface connecting to the
remote ASBR-PE
interface connecting to the
remote ASBR-PE
interface interface-type
interface-number
interface-number
—
Configure the IP address of the
interface
interface
ip address ip-address { mask |
mask-length }
mask-length }
Required
Return to system view
quit
—
Enter BGP view
bgp as-number
—
Enter BGP-VPNv4 subaddress
family view
family view
ipv4-family vpnv4
—
Disable VPN target filtering for
VPNv4 routes
VPNv4 routes
undo policy vpn-target
Required
By default, PE performs VPN
target filtering of the received
VPNv4 routes.
target filtering of the received
VPNv4 routes.
The routes surviving the
filtering will be added to the
routing table, and the others
are discarded.
filtering will be added to the
routing table, and the others
are discarded.
In the inter-provider VPN option B solution, the ASBR PEs need to maintain all VPNv4 routing
information and advertise the information to peer ASBR PEs. In this case, the ASBR PEs must receive
all VPNv4 routing information without performing VPN target filtering.
In the inter-provider VPN option B solution, for the same VPN, the VPN targets for the VPN instances of
the PEs must match those for the VPN instances of the ASBR-PEs in the same AS. This is true for PEs
in different ASs.