Configuring inter-as option b, Network requirements, Configuration procedure – H3C Technologies H3C S10500 Series Switches User Manual
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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] 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