H3C Technologies H3C S10500 Series Switches - Manual (Page 306)

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Configuring inter-AS option B
Network requirements
• Site 1 and Site 2 belong to the same VPN. CE 1 of Site 1 accesses the network through PE 1 in AS
100 and CE 2 of Site 2 accesses the network through PE 2 in AS 600.
• PEs in the same AS run IS-IS.
• PE 1 and ASBR-PE 1 exchange labeled IPv4 routes by MP-iBGP.
• PE 2 and ASBR-PE 2 exchange labeled IPv4 routes by MP-iBGP.
• ASBR-PE 1 and ASBR-PE 2 exchange labeled IPv4 routes by MP-eBGP.
• ASBRs do not perform VPN target filtering of received VPN-IPv4 routes.
Figure 75 Configure inter-AS option B
Loop0 Loop0
Loop0 Loop0
CE 1 CE 2
AS 65001 AS 65002
PE 1 PE 2
ASBR-PE 2 ASBR-PE 1
MPLS backbone MPLS backbone
AS 100 AS 600
Vlan-int12 Vlan-int12
Vlan-int11
Vlan-int11
Vlan-int12 Vlan-int12
Vlan-int11
Vlan-int11
Site 1 Site 2
Device Interface IP address Device Interface IP address
PE 1 Loop0 2.2.2.9/32 PE 2 Loop0 5.5.5.9/32
Vlan-int12 30.0.0.1/8 Vlan-int12 20.0.0.1/8
Vlan-int11 1.1.1.2/8 Vlan-int11 9.1.1.2/8
ASBR-PE 1 Loop0 3.3.3.9/32 ASBR-PE 2 Loop0 4.4.4.9/32
Vlan-int11 1.1.1.1/8 Vlan-int11 9.1.1.1/8
Vlan-int12 11.0.0.2/8 Vlan-int12 11.0.0.1/8
Configuration procedure
1. Configure PE 1
# Run IS-IS on PE 1.
<PE1> system-view
[PE1] isis 1
[PE1-isis-1] network-entity 10.1111.1111.1111.1111.00
[PE1-isis-1] quit
# Configure LSR ID, enable MPLS and LDP.
[PE1] mpls lsr-id 2.2.2.9