Huawei quidway s7700 Configuration Manual page 146

Quidway S7700 Smart Routing Switch
Configuration Guide - VPN
l
Issue 01 (2011-07-15)
Do as follows on the ASBR.
1. Run:
system-view
The system view is displayed.
2. Run:
bgp as-number
The BGP view is displayed.
3. Run:
ipv4-family vpnv4 [ unicast ]
The BGP-VPNv4 address family is displayed.
4. Run:
undo policy vpn-target
The VPN IPv4 routes are not filtered by the VPN target.
By default, the PE performs VPN target filtering on the received IPv4 VPN routes.
The routes passing the filter is added to the routing table, and the others are discarded.
If the PE is not configured with VPN instance, or the VPN instance is not configured
with the VPN target, the PE discards all the received VPN IPv4 routes.
In the Inter-AS VPN Option B mode, if the ASBR does not store information about
the VPN instance, the ASBR must save all the VPNv4 routing information and
advertise it to the peer ASBR. In this case, the ASBR should receive all the VPNv4
routing information without the VPN target filtering.
VPN Target Filtering
Do as follows on the ASBR.
1. Run:
system-view
The system view is displayed.
2. Run:
ip extcommunity-filter extcomm-filter-number { permit | deny } { rt { as-
number:nn | ipv4-address:nn } } &<1-16>
The extended community filter is configured.
3. Run:
route-policy route-policy-name permit node node
The routing policy is configured.
4. Run:
if-match extcommunity-filter extcomm-filter-number &<1-16>
A matching rule based on the extended community filter is configured.
5. Run:
quit
Return to the system view.
6. Run:
bgp as-number
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3 BGP MPLS IP VPN Configuration
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