3Com S7906E - Switch, Руководство по настройке

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Refer to Configuring Basic MPLS L3VPN .
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 interface-type
interface-number
—
Configure the IP address of the
interface ip address ip-address { mask |
mask-length }
Required
Return to system view quit —
Enter BGP view bgp as-number —
Enter BGP-VPNv4 subaddress
family view
ipv4-family vpnv4 —
Disable VPN target filtering for
VPNv4 routes
undo policy vpn-target
Required
By default, PE performs VPN
target filtering of the received
VPNv4 routes.
The routes surviving the
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.